├── Sony_IMX219.png ├── Omnivision_OV5647.jpg ├── est-nir-response ├── CMOS1280b1.png ├── SonyIMX178qe.jpg ├── Bfilter_NIRsketch.png ├── Gfilter_NIRsketch.png ├── Rfilter_NIRsketch.png ├── SonyIMX219_v_randomCMOS.png ├── SonyIMX219withNIRestimate_v_similarCMOS.png ├── Notes │ └── EstimatingNIRResponseForPiCamV2 │ │ ├── Estimating NIR response of PiCam v2.resources │ │ ├── SonyIMX219_v_randomCMOS.png │ │ ├── 98646A95-3BB8-4F2F-832D-B247F92C1256.png │ │ ├── AEDCEF28-C3F9-403C-B558-39FEA993E0BD.png │ │ ├── FB060B6C-5394-48FE-BE0A-50E72F284296.png │ │ └── SonyIMX219withNIRestimate_v_similarCMOS.png │ │ └── Estimating NIR response of PiCam v2.html ├── Rfilter_NIRsketch.csv ├── Gfilter_NIRsketch.csv ├── R_similar.csv ├── B_similar.csv ├── Bfilter_NIRsketch.csv ├── G_similar.csv ├── SonyIMX178qe_extracted.csv ├── estimateNIRresponse.py └── Sony_IMX219_NIRESTIMATE_spectral_response.csv ├── README.md ├── Omnivision_OV5647_spectral_response.csv ├── Sony_IMX219_spectral_response.csv └── LICENSE 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A physical measurement will still be needed to quantify the remaining near infrared spectrum (> 700 nm). 4 | 5 | Missing or uncertain edge values, at the beginning and end of each curve, were carried forward or backward when missing (2 values at most). Note that these values are scaled between 0-100%, and true quantum efficiency (QE) will be lower for each sensor. 6 | 7 | A true response curve measured using a monochromator has been described in [Pagnutti et al. 2017](https://www.spiedigitallibrary.org/journals/journal-of-electronic-imaging/volume-26/issue-01/013014/Laying-the-foundation-to-use-Raspberry-Pi-3-V2-camera/10.1117/1.JEI.26.1.013014.full?SSO=1). 8 | 9 | ### Raspberry pi camera v1 - Omnivisoin OV5647 10 | 11 | ![](https://raw.githubusercontent.com/khufkens/pi-camera-response-curves/master/Omnivision_OV5647.jpg) 12 | 13 | ### Raspberry pi camera v2 - Sony IMX219 14 | 15 | ![](https://raw.githubusercontent.com/khufkens/pi-camera-response-curves/master/Sony_IMX219.png) 16 | -------------------------------------------------------------------------------- /est-nir-response/Rfilter_NIRsketch.csv: -------------------------------------------------------------------------------- 1 | 702.32, 49.42 2 | 705.33, 49.30 3 | 708.88, 49.15 4 | 712.49, 48.98 5 | 715.58, 48.85 6 | 718.94, 48.65 7 | 722.44, 48.46 8 | 725.55, 48.21 9 | 728.56, 47.95 10 | 732.11, 47.61 11 | 735.39, 47.25 12 | 738.61, 46.87 13 | 741.78, 46.48 14 | 745.22, 46.03 15 | 748.55, 45.59 16 | 751.78, 45.13 17 | 755.22, 44.65 18 | 758.28, 44.22 19 | 761.67, 43.79 20 | 764.94, 43.43 21 | 768.33, 43.14 22 | 771.31, 42.83 23 | 775.27, 42.38 24 | 779.10, 41.88 25 | 782.37, 41.40 26 | 785.65, 40.88 27 | 788.93, 40.29 28 | 792.20, 39.70 29 | 795.48, 39.02 30 | 798.76, 38.39 31 | 801.76, 37.72 32 | 804.49, 37.05 33 | 807.49, 36.36 34 | 810.49, 35.61 35 | 813.22, 34.94 36 | 815.95, 34.26 37 | 818.68, 33.55 38 | 821.68, 32.91 39 | 824.96, 32.45 40 | 828.24, 31.95 41 | 831.51, 31.36 42 | 834.79, 30.71 43 | 838.07, 29.99 44 | 841.07, 29.30 45 | 843.80, 28.60 46 | 846.53, 27.89 47 | 849.26, 27.20 48 | 851.98, 26.47 49 | 854.71, 25.75 50 | 857.44, 25.09 51 | 860.45, 24.39 52 | 863.72, 23.75 53 | 867.00, 23.17 54 | 870.27, 22.59 55 | 873.55, 22.03 56 | 876.83, 21.49 57 | 880.11, 20.92 58 | 883.38, 20.40 59 | 886.66, 19.87 60 | 889.94, 19.34 61 | 893.21, 18.81 62 | 896.49, 18.28 63 | 899.77, 17.78 64 | 903.05, 17.25 65 | 906.16, 16.79 66 | 909.60, 16.25 67 | 912.88, 15.75 68 | 916.15, 15.25 69 | 919.43, 14.75 70 | 922.71, 14.25 71 | 925.99, 13.72 72 | 928.99, 13.28 73 | 932.54, 12.72 74 | 935.82, 12.24 75 | 939.10, 11.72 76 | 942.37, 11.22 77 | 945.65, 10.72 78 | 948.93, 10.22 79 | 952.15, 9.81 80 | 955.48, 9.41 81 | 958.63, 9.05 82 | 962.04, 8.63 83 | 965.26, 8.25 84 | 968.60, 7.85 85 | 971.74, 7.49 86 | 975.15, 7.07 87 | 978.02, 6.74 88 | 981.71, 6.29 89 | 984.82, 5.94 90 | 988.27, 5.50 91 | 991.13, 5.17 92 | 994.82, 4.74 93 | 998.70, 4.47 94 | 1002.47, 4.24 95 | 1006.30, 4.00 96 | 1010.07, 3.77 97 | 1013.90, 3.53 98 | 1017.07, 3.34 99 | 1020.24, 3.15 100 | 1023.74, 2.93 101 | 1027.56, 2.69 102 | 1030.73, 2.50 103 | 1033.90, 2.30 104 | 1037.40, 2.09 105 | 1041.23, 1.85 106 | 1045.05, 1.61 107 | 1047.84, 1.44 108 | -------------------------------------------------------------------------------- /est-nir-response/Gfilter_NIRsketch.csv: -------------------------------------------------------------------------------- 1 | 700.76, 23.59 2 | 704.05, 24.09 3 | 707.33, 24.35 4 | 710.61, 24.39 5 | 713.89, 24.38 6 | 717.17, 24.21 7 | 720.45, 23.93 8 | 723.73, 23.52 9 | 727.01, 23.24 10 | 730.29, 23.19 11 | 733.57, 23.19 12 | 736.85, 23.26 13 | 740.13, 23.45 14 | 743.42, 23.72 15 | 746.70, 24.08 16 | 749.99, 24.52 17 | 753.27, 25.15 18 | 756.56, 25.78 19 | 759.84, 26.46 20 | 763.13, 27.16 21 | 766.42, 27.88 22 | 769.70, 28.60 23 | 772.99, 29.27 24 | 776.27, 29.99 25 | 779.56, 30.60 26 | 782.84, 31.14 27 | 786.13, 31.57 28 | 789.41, 31.87 29 | 792.69, 32.04 30 | 795.98, 32.09 31 | 799.26, 32.08 32 | 802.54, 31.97 33 | 805.82, 31.97 34 | 809.10, 31.88 35 | 812.38, 31.74 36 | 815.66, 31.55 37 | 818.94, 31.29 38 | 822.22, 30.98 39 | 825.49, 30.60 40 | 828.77, 30.12 41 | 832.05, 29.57 42 | 835.32, 28.99 43 | 838.60, 28.55 44 | 841.88, 28.03 45 | 845.16, 27.39 46 | 848.16, 26.73 47 | 850.89, 26.05 48 | 853.62, 25.36 49 | 856.35, 24.61 50 | 859.35, 24.02 51 | 862.63, 23.47 52 | 865.90, 22.94 53 | 869.18, 22.39 54 | 872.46, 21.87 55 | 875.73, 21.32 56 | 879.01, 20.78 57 | 882.29, 20.24 58 | 885.56, 19.70 59 | 888.84, 19.17 60 | 892.12, 18.63 61 | 895.40, 18.10 62 | 898.67, 17.54 63 | 901.95, 17.01 64 | 905.23, 16.46 65 | 908.50, 15.95 66 | 911.78, 15.47 67 | 915.06, 14.98 68 | 918.34, 14.48 69 | 921.61, 13.99 70 | 924.89, 13.50 71 | 928.17, 13.01 72 | 931.45, 12.51 73 | 934.72, 12.02 74 | 938.00, 11.54 75 | 941.28, 11.04 76 | 944.56, 10.55 77 | 947.83, 10.06 78 | 951.11, 9.57 79 | 954.39, 9.07 80 | 957.67, 8.67 81 | 960.94, 8.27 82 | 964.22, 7.91 83 | 967.50, 7.51 84 | 970.78, 7.13 85 | 974.06, 6.76 86 | 977.33, 6.36 87 | 980.61, 5.98 88 | 983.89, 5.60 89 | 987.17, 5.20 90 | 990.45, 4.84 91 | 993.73, 4.44 92 | 997.01, 4.22 93 | 1000.28, 4.02 94 | 1003.56, 3.86 95 | 1006.84, 3.66 96 | 1010.12, 3.50 97 | 1013.40, 3.30 98 | 1016.68, 3.14 99 | 1019.96, 2.94 100 | 1023.24, 2.78 101 | 1026.52, 2.58 102 | 1029.80, 2.42 103 | 1033.08, 2.22 104 | 1036.36, 2.05 105 | 1039.64, 1.85 106 | 1042.92, 1.69 107 | 1046.20, 1.48 108 | 1048.39, 1.38 109 | -------------------------------------------------------------------------------- /est-nir-response/R_similar.csv: -------------------------------------------------------------------------------- 1 | 393.73, 8.09 2 | 402.34, 7.08 3 | 410.95, 6.03 4 | 419.56, 5.03 5 | 428.17, 4.16 6 | 436.78, 3.43 7 | 444.68, 2.91 8 | 458.31, 2.30 9 | 466.92, 2.25 10 | 475.53, 2.36 11 | 484.14, 2.28 12 | 492.75, 2.25 13 | 501.36, 2.34 14 | 509.97, 2.89 15 | 518.58, 4.00 16 | 527.19, 4.81 17 | 535.81, 4.55 18 | 544.42, 3.81 19 | 553.03, 3.39 20 | 559.96, 3.79 21 | 565.22, 5.23 22 | 568.81, 6.67 23 | 570.49, 8.18 24 | 571.68, 10.16 25 | 572.40, 11.43 26 | 573.36, 12.65 27 | 573.84, 14.31 28 | 574.79, 15.60 29 | 575.27, 17.41 30 | 576.23, 18.92 31 | 576.71, 20.95 32 | 577.66, 22.31 33 | 578.14, 24.27 34 | 579.10, 25.52 35 | 579.58, 27.37 36 | 580.53, 28.88 37 | 581.01, 30.91 38 | 581.97, 31.98 39 | 582.45, 34.89 40 | 582.45, 33.56 41 | 583.40, 35.89 42 | 583.88, 38.88 43 | 583.88, 37.55 44 | 584.84, 39.98 45 | 586.27, 44.59 46 | 586.75, 46.40 47 | 587.71, 47.66 48 | 588.19, 49.50 49 | 589.14, 51.01 50 | 590.34, 53.26 51 | 591.77, 54.98 52 | 593.45, 56.58 53 | 596.08, 58.41 54 | 601.82, 60.72 55 | 609.71, 60.08 56 | 616.17, 58.55 57 | 621.91, 57.05 58 | 627.65, 55.81 59 | 633.39, 54.56 60 | 639.13, 53.24 61 | 644.87, 51.74 62 | 653.48, 49.61 63 | 659.22, 48.28 64 | 664.96, 46.84 65 | 670.70, 45.43 66 | 676.44, 43.97 67 | 682.18, 42.67 68 | 688.64, 41.38 69 | 695.82, 40.01 70 | 702.28, 38.54 71 | 707.30, 37.07 72 | 711.60, 35.78 73 | 715.91, 34.56 74 | 720.93, 33.29 75 | 728.11, 32.05 76 | 736.72, 31.54 77 | 745.33, 31.44 78 | 753.94, 31.04 79 | 762.55, 30.24 80 | 771.16, 29.73 81 | 779.77, 29.29 82 | 788.38, 28.75 83 | 796.99, 28.01 84 | 804.89, 26.84 85 | 811.34, 25.49 86 | 817.08, 24.05 87 | 823.54, 22.74 88 | 830.72, 21.74 89 | 832.87, 21.11 90 | 841.48, 20.54 91 | 852.24, 19.07 92 | 863.72, 17.07 93 | 871.62, 15.64 94 | 876.64, 14.86 95 | 882.38, 14.49 96 | 890.27, 13.20 97 | 898.88, 11.97 98 | 907.49, 11.06 99 | 916.10, 10.34 100 | 924.72, 9.53 101 | 933.33, 8.52 102 | 941.94, 7.52 103 | 950.55, 6.58 104 | 959.16, 5.77 105 | 967.77, 5.03 106 | 976.38, 4.37 107 | 984.99, 3.76 108 | 993.60, 3.28 109 | 1002.21, 2.85 110 | 1010.82, 2.43 111 | 1019.43, 2.02 112 | 1028.04, 1.60 113 | 1036.65, 1.29 114 | 1045.26, 0.99 115 | 1050.29, 0.92 116 | 117 | -------------------------------------------------------------------------------- /est-nir-response/B_similar.csv: -------------------------------------------------------------------------------- 1 | 391.22, 17.19 2 | 392.30, 18.62 3 | 393.73, 20.06 4 | 395.17, 21.39 5 | 396.60, 22.72 6 | 398.75, 24.34 7 | 399.47, 25.60 8 | 401.62, 27.39 9 | 404.49, 29.86 10 | 407.36, 32.07 11 | 410.23, 34.12 12 | 413.10, 35.81 13 | 415.97, 37.33 14 | 418.13, 38.77 15 | 421.24, 40.09 16 | 423.87, 41.42 17 | 426.74, 42.75 18 | 429.61, 44.08 19 | 432.48, 45.41 20 | 436.07, 46.92 21 | 440.37, 48.62 22 | 445.39, 50.16 23 | 452.57, 51.35 24 | 461.18, 51.29 25 | 468.36, 50.30 26 | 473.38, 48.95 27 | 476.97, 47.62 28 | 479.60, 46.14 29 | 481.99, 44.63 30 | 484.86, 42.72 31 | 487.73, 40.54 32 | 490.60, 38.32 33 | 492.75, 36.61 34 | 494.19, 35.34 35 | 495.62, 34.01 36 | 497.78, 32.31 37 | 498.49, 30.80 38 | 500.65, 28.81 39 | 501.36, 29.47 40 | 503.52, 27.29 41 | 504.95, 25.74 42 | 506.39, 23.88 43 | 508.78, 22.05 44 | 511.17, 20.43 45 | 513.56, 18.40 46 | 516.43, 16.41 47 | 519.30, 14.53 48 | 522.17, 13.02 49 | 526.48, 11.36 50 | 530.78, 9.81 51 | 535.81, 8.41 52 | 542.26, 7.00 53 | 549.44, 5.59 54 | 557.33, 4.40 55 | 565.94, 3.61 56 | 574.55, 3.28 57 | 583.16, 3.24 58 | 591.77, 3.22 59 | 600.38, 2.95 60 | 608.99, 2.58 61 | 617.61, 2.32 62 | 626.22, 2.19 63 | 634.83, 2.36 64 | 643.44, 2.65 65 | 652.05, 2.98 66 | 660.66, 3.43 67 | 668.55, 3.77 68 | 679.31, 4.11 69 | 687.92, 4.38 70 | 696.54, 4.61 71 | 705.15, 4.68 72 | 713.76, 4.46 73 | 722.37, 4.07 74 | 730.98, 3.91 75 | 739.59, 3.91 76 | 748.20, 3.98 77 | 756.81, 4.24 78 | 765.42, 4.79 79 | 773.31, 5.85 80 | 779.05, 7.26 81 | 783.36, 8.58 82 | 786.23, 9.99 83 | 789.10, 11.54 84 | 791.97, 13.20 85 | 794.84, 14.92 86 | 797.71, 16.49 87 | 799.86, 17.96 88 | 803.45, 19.36 89 | 808.47, 20.75 90 | 815.65, 21.69 91 | 824.26, 21.58 92 | 832.87, 21.11 93 | 841.48, 20.54 94 | 850.09, 19.79 95 | 857.98, 18.62 96 | 865.88, 17.19 97 | 874.49, 15.86 98 | 882.38, 14.49 99 | 890.27, 13.20 100 | 898.88, 11.97 101 | 907.49, 11.06 102 | 916.10, 10.34 103 | 924.72, 9.53 104 | 933.33, 8.52 105 | 941.94, 7.52 106 | 950.55, 6.58 107 | 959.16, 5.77 108 | 967.77, 5.03 109 | 976.38, 4.37 110 | 984.99, 3.76 111 | 993.60, 3.28 112 | 1002.21, 2.85 113 | 1010.82, 2.43 114 | 1019.43, 2.02 115 | 1028.04, 1.60 116 | 1036.65, 1.29 117 | 1045.26, 0.99 118 | 1050.29, 0.92 119 | -------------------------------------------------------------------------------- /est-nir-response/Bfilter_NIRsketch.csv: -------------------------------------------------------------------------------- 1 | 701.45, 11.03 2 | 704.46, 11.20 3 | 708.29, 11.32 4 | 712.11, 11.17 5 | 715.39, 10.97 6 | 718.26, 10.71 7 | 722.12, 10.28 8 | 725.23, 9.93 9 | 728.46, 9.60 10 | 731.79, 9.33 11 | 735.07, 9.10 12 | 738.30, 8.98 13 | 741.64, 8.90 14 | 744.92, 8.90 15 | 748.36, 9.00 16 | 752.03, 9.20 17 | 755.31, 9.50 18 | 758.59, 9.96 19 | 761.33, 10.58 20 | 763.24, 11.49 21 | 764.89, 12.39 22 | 766.26, 13.14 23 | 767.63, 13.93 24 | 769.00, 14.67 25 | 770.37, 15.45 26 | 772.01, 16.36 27 | 773.38, 17.11 28 | 774.75, 17.90 29 | 776.40, 18.82 30 | 778.04, 19.72 31 | 779.68, 20.63 32 | 781.33, 21.53 33 | 782.97, 22.47 34 | 784.34, 23.21 35 | 785.71, 23.99 36 | 787.35, 24.84 37 | 789.00, 25.66 38 | 790.64, 26.40 39 | 792.28, 27.12 40 | 794.20, 27.84 41 | 796.39, 28.55 42 | 798.85, 29.26 43 | 801.59, 30.07 44 | 804.60, 30.81 45 | 807.88, 31.41 46 | 811.17, 31.81 47 | 814.45, 32.07 48 | 817.73, 32.11 49 | 820.85, 32.08 50 | 824.46, 31.84 51 | 827.57, 31.39 52 | 830.58, 30.77 53 | 833.31, 30.11 54 | 836.31, 29.40 55 | 839.32, 28.64 56 | 842.05, 27.99 57 | 844.78, 27.30 58 | 847.51, 26.62 59 | 850.24, 25.93 60 | 853.25, 25.21 61 | 856.53, 24.64 62 | 859.81, 24.10 63 | 863.09, 23.55 64 | 866.37, 22.98 65 | 869.64, 22.45 66 | 872.92, 21.89 67 | 876.20, 21.35 68 | 879.48, 20.79 69 | 882.76, 20.24 70 | 886.04, 19.70 71 | 889.32, 19.13 72 | 892.60, 18.60 73 | 895.88, 18.04 74 | 899.16, 17.50 75 | 902.43, 16.94 76 | 905.71, 16.39 77 | 908.99, 15.85 78 | 912.27, 15.29 79 | 915.55, 14.74 80 | 918.83, 14.18 81 | 922.11, 13.65 82 | 925.39, 13.10 83 | 928.67, 12.63 84 | 931.95, 12.15 85 | 935.22, 11.67 86 | 938.50, 11.19 87 | 941.78, 10.71 88 | 945.06, 10.23 89 | 948.34, 9.74 90 | 951.62, 9.28 91 | 954.90, 8.81 92 | 958.18, 8.34 93 | 961.46, 7.86 94 | 964.74, 7.41 95 | 968.02, 7.05 96 | 971.30, 6.69 97 | 974.58, 6.33 98 | 977.86, 5.97 99 | 981.14, 5.61 100 | 984.25, 5.27 101 | 987.97, 4.88 102 | 991.69, 4.50 103 | 994.80, 4.16 104 | 997.92, 3.89 105 | 1001.42, 3.73 106 | 1004.64, 3.56 107 | 1007.92, 3.37 108 | 1011.07, 3.22 109 | 1014.43, 3.02 110 | 1017.93, 2.86 111 | 1021.04, 2.67 112 | 1024.33, 2.51 113 | 1028.10, 2.30 114 | 1031.60, 2.13 115 | 1034.71, 1.95 116 | 1037.99, 1.78 117 | 1041.77, 1.58 118 | 1045.26, 1.41 119 | 1047.83, 1.26 120 | -------------------------------------------------------------------------------- /est-nir-response/G_similar.csv: -------------------------------------------------------------------------------- 1 | 393.73, 2.10 2 | 402.34, 1.88 3 | 410.95, 1.78 4 | 419.56, 1.73 5 | 428.17, 1.86 6 | 436.78, 2.04 7 | 445.39, 2.25 8 | 454.00, 2.80 9 | 461.18, 3.85 10 | 466.92, 5.23 11 | 472.66, 6.67 12 | 478.40, 8.11 13 | 484.14, 9.36 14 | 489.16, 10.77 15 | 493.47, 12.83 16 | 495.86, 14.57 17 | 498.25, 16.34 18 | 499.93, 18.18 19 | 501.36, 19.90 20 | 502.80, 21.61 21 | 504.23, 23.33 22 | 507.10, 27.37 23 | 508.78, 29.73 24 | 510.21, 31.76 25 | 511.65, 33.86 26 | 513.08, 36.07 27 | 514.52, 38.40 28 | 515.95, 40.57 29 | 517.39, 42.71 30 | 518.58, 44.85 31 | 520.02, 46.68 32 | 521.45, 48.39 33 | 522.89, 50.00 34 | 524.32, 51.71 35 | 525.76, 53.21 36 | 527.19, 54.54 37 | 528.87, 56.14 38 | 531.26, 57.69 39 | 535.09, 59.83 40 | 541.55, 61.47 41 | 549.44, 61.21 42 | 555.18, 59.83 43 | 558.77, 58.46 44 | 561.64, 57.25 45 | 564.51, 55.92 46 | 567.38, 54.48 47 | 570.25, 52.93 48 | 573.12, 51.33 49 | 575.99, 49.72 50 | 578.14, 48.01 51 | 580.53, 46.25 52 | 582.92, 44.74 53 | 584.60, 43.41 54 | 586.03, 42.14 55 | 587.47, 40.81 56 | 588.90, 39.65 57 | 590.34, 38.38 58 | 591.77, 37.05 59 | 593.21, 35.67 60 | 594.64, 34.23 61 | 596.08, 32.73 62 | 597.51, 31.41 63 | 598.95, 30.02 64 | 600.38, 28.42 65 | 601.82, 27.09 66 | 603.25, 25.60 67 | 604.69, 24.21 68 | 606.12, 22.72 69 | 607.56, 21.34 70 | 608.99, 20.01 71 | 610.43, 18.73 72 | 612.10, 17.19 73 | 614.50, 15.64 74 | 616.41, 13.90 75 | 619.04, 12.54 76 | 621.91, 10.99 77 | 625.50, 9.51 78 | 629.80, 8.15 79 | 636.26, 6.82 80 | 644.87, 5.75 81 | 653.48, 5.16 82 | 662.09, 5.01 83 | 671.42, 5.45 84 | 679.31, 6.30 85 | 687.21, 7.78 86 | 693.67, 9.08 87 | 700.84, 10.43 88 | 709.45, 11.32 89 | 718.06, 11.49 90 | 726.67, 11.28 91 | 735.28, 11.25 92 | 743.89, 11.73 93 | 752.50, 12.81 94 | 760.40, 14.09 95 | 767.57, 15.44 96 | 774.75, 16.79 97 | 782.64, 18.18 98 | 791.25, 19.40 99 | 799.86, 20.16 100 | 812.78, 20.03 101 | 821.39, 19.32 102 | 830.00, 18.75 103 | 838.61, 18.51 104 | 847.22, 18.13 105 | 855.83, 17.31 106 | 864.44, 16.19 107 | 873.05, 14.99 108 | 881.66, 13.75 109 | 890.27, 12.48 110 | 898.88, 11.45 111 | 907.49, 10.66 112 | 915.96, 9.95 113 | 924.72, 9.11 114 | 934.04, 8.06 115 | 941.94, 7.52 116 | 950.55, 6.58 117 | 959.16, 5.77 118 | 966.09, 4.83 119 | 974.23, 4.13 120 | 982.84, 3.57 121 | 993.60, 3.28 122 | 1002.21, 2.85 123 | 1010.82, 2.43 124 | 1019.43, 2.02 125 | 1028.04, 1.60 126 | 1036.65, 1.29 127 | 1045.26, 0.99 128 | 1050.29, 0.92 129 | -------------------------------------------------------------------------------- /est-nir-response/SonyIMX178qe_extracted.csv: -------------------------------------------------------------------------------- 1 | 401.67, 0.71 2 | 405.16, 0.73 3 | 408.34, 0.75 4 | 411.52, 0.76 5 | 414.70, 0.77 6 | 418.02, 0.79 7 | 421.76, 0.80 8 | 425.83, 0.82 9 | 430.60, 0.83 10 | 435.37, 0.84 11 | 440.14, 0.86 12 | 444.91, 0.87 13 | 449.68, 0.88 14 | 454.45, 0.90 15 | 459.22, 0.91 16 | 463.99, 0.92 17 | 468.76, 0.93 18 | 473.53, 0.94 19 | 478.31, 0.96 20 | 483.08, 0.96 21 | 487.85, 0.97 22 | 492.62, 0.97 23 | 497.39, 0.98 24 | 502.16, 0.98 25 | 506.93, 0.98 26 | 511.70, 0.99 27 | 516.47, 0.99 28 | 521.24, 1.00 29 | 526.01, 1.00 30 | 530.78, 1.00 31 | 535.55, 1.00 32 | 540.32, 1.00 33 | 545.09, 1.00 34 | 549.86, 0.99 35 | 554.63, 0.99 36 | 559.40, 0.99 37 | 564.17, 0.98 38 | 568.94, 0.98 39 | 573.71, 0.97 40 | 578.48, 0.96 41 | 583.25, 0.95 42 | 588.02, 0.94 43 | 592.79, 0.92 44 | 597.56, 0.91 45 | 602.33, 0.90 46 | 607.10, 0.90 47 | 611.87, 0.89 48 | 616.64, 0.88 49 | 621.41, 0.88 50 | 626.18, 0.87 51 | 630.95, 0.86 52 | 635.72, 0.85 53 | 640.49, 0.84 54 | 645.26, 0.83 55 | 650.03, 0.82 56 | 654.80, 0.81 57 | 659.57, 0.80 58 | 664.34, 0.80 59 | 669.11, 0.79 60 | 673.88, 0.78 61 | 678.65, 0.77 62 | 683.42, 0.77 63 | 688.19, 0.76 64 | 692.22, 0.74 65 | 694.61, 0.73 66 | 698.92, 0.72 67 | 701.94, 0.71 68 | 705.94, 0.70 69 | 708.26, 0.69 70 | 711.91, 0.67 71 | 715.22, 0.66 72 | 718.40, 0.65 73 | 723.17, 0.64 74 | 727.94, 0.63 75 | 732.71, 0.61 76 | 737.48, 0.61 77 | 742.25, 0.60 78 | 747.02, 0.60 79 | 751.79, 0.59 80 | 756.56, 0.58 81 | 761.33, 0.57 82 | 766.10, 0.56 83 | 770.87, 0.55 84 | 774.68, 0.54 85 | 779.62, 0.53 86 | 784.39, 0.51 87 | 789.16, 0.50 88 | 793.93, 0.49 89 | 798.70, 0.48 90 | 803.47, 0.46 91 | 808.24, 0.45 92 | 813.01, 0.45 93 | 817.78, 0.44 94 | 822.55, 0.43 95 | 827.32, 0.43 96 | 832.09, 0.42 97 | 836.86, 0.41 98 | 841.63, 0.40 99 | 846.40, 0.39 100 | 851.17, 0.39 101 | 855.94, 0.38 102 | 860.71, 0.37 103 | 863.99, 0.35 104 | 867.91, 0.34 105 | 871.84, 0.33 106 | 876.61, 0.32 107 | 881.38, 0.31 108 | 886.15, 0.30 109 | 890.92, 0.28 110 | 895.16, 0.27 111 | 897.81, 0.26 112 | 901.08, 0.25 113 | 906.02, 0.23 114 | 910.79, 0.22 115 | 915.56, 0.22 116 | 920.33, 0.21 117 | 925.10, 0.20 118 | 929.87, 0.20 119 | 934.64, 0.19 120 | 939.41, 0.18 121 | 944.18, 0.17 122 | 948.96, 0.16 123 | 953.73, 0.16 124 | 958.50, 0.15 125 | 963.27, 0.14 126 | 968.04, 0.14 127 | 972.81, 0.13 128 | 977.58, 0.12 129 | 982.35, 0.11 130 | 987.12, 0.10 131 | 991.89, 0.10 132 | 996.66, 0.09 133 | 1000.23, 0.09 134 | -------------------------------------------------------------------------------- /est-nir-response/estimateNIRresponse.py: -------------------------------------------------------------------------------- 1 | import numpy as np 2 | import matplotlib.pyplot as plt 3 | 4 | # Data from a probably-similar-enough CMOS sensor that goes into the NIR to ~1050nm where CMOS all peter out 5 | # Extracted from the file CMOS1280b1.png 6 | simRlam, simRval = np.genfromtxt("R_similar.csv", delimiter=", ", unpack=True) 7 | simGlam, simGval = np.genfromtxt("G_similar.csv", delimiter=", ", unpack=True) 8 | simBlam, simBval = np.genfromtxt("B_similar.csv", delimiter=", ", unpack=True) 9 | 10 | # Data from RasPiCam-v2(like) sensor (Sony IMX111), extracted from digitized plot data by khufkens 11 | lam, Rval, Gval, Bval = np.genfromtxt("../Sony_IMX219_spectral_response.csv", delimiter=",", unpack=True, skip_header=1) 12 | 13 | # Sensor QE data from another in the Sony Exmor R sensor line, to use as a 14 | # guideline for the overall CMOS sensitivity envelope from 300-1100nm 15 | #exmorQElam, exmorQE = np.genfromtxt("SonyIMX178qe_extracted.csv", delimiter=", ", unpack=True) 16 | # 17 | #plt.plot(exmorQElam, exmorQE*100, "--k") 18 | # doesn't look like it describes the envelope of the IMX219 very well...forget it. 19 | 20 | scale = np.max(Gval) / np.max(simGval) 21 | squish = 1.0 #0.98 22 | plt.plot(simRlam*squish, simRval*scale, ':k') 23 | plt.plot(simGlam*squish, simGval*scale, ':k') 24 | plt.plot(simBlam*squish, simBval*scale, ':k') 25 | plt.plot(lam, Rval, '-r') 26 | plt.plot(lam, Gval, '-g') 27 | plt.plot(lam, Bval, '-b') 28 | 29 | plt.xlabel("Wavelength [nm]") 30 | plt.ylabel("Relative Response [%]") 31 | plt.title("Sony-IMX219 (Vis) and Random CMOS sensor (to NIR)") 32 | plt.show() 33 | # Save file interactively, as "SonyIMX219_v_randomCMOS.png" 34 | 35 | ########################################################################################## 36 | # Add Bezier curves of new estimates by eye in Inkscape 37 | # (original curves in file RGB_NIRsketches.svg) 38 | #************************************************************************************************************* 39 | #****IF YOU THINK THE CURVES SHOULD BE TWEAKED, GO IN THERE, AND MODIFY THEM, THEN FOLLOW THE NEXT STEPS!!**** 40 | #************************************************************************************************************* 41 | # Turn on mask layer and R, G, or B layer, then export to 3 PNGs named [x]filter_NIRsketch.png 42 | # Import estimated curves to WebPlotDigitizer, extract data 43 | # Generate new CSV files, and plot these here 44 | 45 | # Data from a probably-similar-enough CMOS sensor that goes into the NIR 46 | estRlam, estRval = np.genfromtxt("Rfilter_NIRsketch.csv", delimiter=", ", unpack=True) 47 | estGlam, estGval = np.genfromtxt("Gfilter_NIRsketch.csv", delimiter=", ", unpack=True) 48 | estBlam, estBval = np.genfromtxt("Bfilter_NIRsketch.csv", delimiter=", ", unpack=True) 49 | 50 | plt.plot(simRlam*squish, simRval*scale, ':r') 51 | plt.plot(simGlam*squish, simGval*scale, ':g') 52 | plt.plot(simBlam*squish, simBval*scale, ':b') 53 | plt.plot(lam, Rval, '-r', linewidth=2.0) 54 | plt.plot(lam, Gval, '-g', linewidth=2.0) 55 | plt.plot(lam, Bval, '-b', linewidth=2.0) 56 | plt.plot(estRlam, estRval, "--r", linewidth=2.0) 57 | plt.plot(estGlam, estGval, "--g", linewidth=2.0) 58 | plt.plot(estBlam, estBval, "--b", linewidth=2.0) 59 | plt.xlabel("Wavelength [nm]") 60 | plt.ylabel("Relative Response [%]") 61 | plt.title("Sony-IMX219 (Vis w/ NIR est'd) and Random CMOS sensor (Vis-NIR)") 62 | plt.show() 63 | # Save interactively as "SonyIMX219withNIRestimate_v_randomCMOS.png" 64 | 65 | ######################################################################################### 66 | 67 | # Finally, do a simple linear interpolation at the regularly-spaced 1nm step values, 68 | # and roll into a single file like khufkens did originally 69 | reglam = np.arange(701,1051) 70 | 71 | Rinterp = np.interp(reglam, estRlam, estRval) 72 | Ginterp = np.interp(reglam, estGlam, estGval) 73 | Binterp = np.interp(reglam, estBlam, estBval) 74 | 75 | with open("Sony_IMX219_NIRESTIMATE_spectral_response.csv", 'w') as fout: 76 | fout.write("wavelength,red_est,green_est,blue_est\n") 77 | for i, rl in enumerate(reglam): 78 | fout.write("%d,%.3f,%.3f,%.3f\n" % (rl, Rinterp[i], Ginterp[i], Binterp[i])) 79 | 80 | # Fin. 81 | 82 | 83 | 84 | -------------------------------------------------------------------------------- /est-nir-response/Notes/EstimatingNIRResponseForPiCamV2/Estimating NIR response of PiCam v2.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | Estimating NIR response of PiCam v2 4 |
There are no published response curves in the NIR for the Sony IMX219 sensor.
5 |

6 |
Most CMOS imaging sensors have a similar-enough sensitivity function. They turn on around 300nm, peak in sensitivity at about 500-600nm, and then peter out just past 1000nm (aka 1 micron). The nitty-gritty details vary from sensor to sensor, but schematically they have a very standard shape.
7 |

8 |
9 |
(source: random pic I found through a google image search for schematic purposes, but it does just happen to show a variety of Sony sensors (ICX and IMX lines) as well as some other brands?)
10 |

11 |
Then we have the actual response functions of the Red, Green, and Blue filters overlaid on the sensor array to give us color information. When we are shown a color response curve, it is almost always the true response of the filters multiplied by the overall sensor response. Just like with the overall response, the details are different here and there, but generically, most have quite similar features.
12 |

13 |
So, in the case of incomplete information, we can use response curves from other sensors to make informed guesses.
14 |

15 |
shapes are similar to other curves I’ve run across in image searches, so we can probably take that one as a decent estimate of what’s going on with the Sony sensor of interest. At any rate, it’s something rather than nothing. Still need someone to do a good measurement of this in real life with one of the unfiltered RasPi Cam v2 sensors.
16 |

17 |

18 |
This curve is pretty close to the visible range shape and relative scales of the RGB visible light response functions
19 |
https://www.matrix-vision.com/manuals/mvBlueCOUGAR-X/CMOS1280b1.png
20 |
https://www.matrix-vision.com/GigE-Vision-camera-mvbluecougar-x.html
21 |

22 |
23 |

24 |
and also similar to other vis/NIR response functions in terms of general spectral shape, but not the relative heights of the RGB curves. Here’s one example.
25 |
26 |

27 |

28 |

29 |
Ok, so since that first plot looks decently similar in character, I ran it through the http://arohatgi.info/WebPlotDigitizer/. Used the automatic tool to extract based on colors, and then hand-modified the CSV tables to copy B points into R and G where those were missing because B was plotted on top. Not a big deal.
30 |

31 |
Then, suck into python and plot these two together…hmm, seems like the characteristics are a little bit different. Instead of trying to spend a lot of time modeling this, we could probably do just as well sketching out the ends of those solid curves by hand. 
32 |
33 |

34 |
Used a nice smooth curve-drawing tool in Inkscape (instead of ugly freehand) to sketch guesses for the NIR parts, export to an image, extract data from these, and make new CSV tables!
35 |

36 |
Hey, I think that looks pretty decent! So, until someone out there makes a real measurement of the NIR response for this sensor, please RELY ON THESE VALUES AT YOUR PERIL.
37 |
38 | -------------------------------------------------------------------------------- /est-nir-response/Sony_IMX219_NIRESTIMATE_spectral_response.csv: -------------------------------------------------------------------------------- 1 | wavelength,red_est,green_est,blue_est 2 | 701,49.420,23.626,11.030 3 | 702,49.420,23.778,11.061 4 | 703,49.393,23.930,11.118 5 | 704,49.353,24.082,11.174 6 | 705,49.313,24.165,11.217 7 | 706,49.272,24.245,11.248 8 | 707,49.229,24.324,11.280 9 | 708,49.187,24.358,11.311 10 | 709,49.144,24.370,11.292 11 | 710,49.097,24.383,11.253 12 | 711,49.050,24.389,11.214 13 | 712,49.003,24.386,11.174 14 | 713,48.959,24.383,11.116 15 | 714,48.916,24.374,11.055 16 | 715,48.874,24.322,10.994 17 | 716,48.825,24.271,10.915 18 | 717,48.765,24.219,10.824 19 | 718,48.706,24.139,10.734 20 | 719,48.647,24.054,10.628 21 | 720,48.592,23.968,10.516 22 | 721,48.538,23.861,10.405 23 | 722,48.484,23.736,10.293 24 | 723,48.415,23.611,10.181 25 | 724,48.335,23.497,10.068 26 | 725,48.254,23.412,9.956 27 | 726,48.171,23.326,9.851 28 | 727,48.085,23.241,9.749 29 | 728,47.998,23.225,9.647 30 | 729,47.908,23.210,9.556 31 | 730,47.812,23.194,9.475 32 | 731,47.716,23.190,9.394 33 | 732,47.621,23.190,9.315 34 | 733,47.512,23.190,9.245 35 | 734,47.403,23.199,9.175 36 | 735,47.293,23.221,9.105 37 | 736,47.178,23.242,9.065 38 | 737,47.060,23.269,9.028 39 | 738,46.942,23.327,8.991 40 | 739,46.822,23.385,8.963 41 | 740,46.699,23.442,8.939 42 | 741,46.576,23.521,8.915 43 | 742,46.451,23.603,8.900 44 | 743,46.320,23.686,8.900 45 | 744,46.190,23.784,8.900 46 | 745,46.059,23.893,8.902 47 | 746,45.927,24.003,8.931 48 | 747,45.795,24.120,8.960 49 | 748,45.663,24.254,8.990 50 | 749,45.526,24.388,9.035 51 | 750,45.383,24.522,9.089 52 | 751,45.241,24.714,9.144 53 | 752,45.099,24.906,9.198 54 | 753,44.960,25.098,9.289 55 | 754,44.820,25.290,9.380 56 | 755,44.681,25.481,9.472 57 | 756,44.540,25.673,9.597 58 | 757,44.400,25.871,9.737 59 | 758,44.259,26.079,9.877 60 | 759,44.129,26.286,10.053 61 | 760,44.002,26.494,10.279 62 | 761,43.875,26.707,10.505 63 | 762,43.754,26.920,10.899 64 | 763,43.644,27.132,11.376 65 | 764,43.533,27.350,11.905 66 | 765,43.425,27.569,12.450 67 | 766,43.339,27.788,12.998 68 | 767,43.254,28.007,13.567 69 | 768,43.168,28.227,14.130 70 | 769,43.070,28.446,14.670 71 | 770,42.966,28.661,15.239 72 | 771,42.862,28.865,15.800 73 | 772,42.752,29.068,16.354 74 | 773,42.638,29.272,16.902 75 | 774,42.524,29.492,17.468 76 | 775,42.411,29.711,18.039 77 | 776,42.285,29.931,18.597 78 | 777,42.154,30.125,19.149 79 | 778,42.024,30.311,19.698 80 | 779,41.893,30.496,20.253 81 | 780,41.748,30.672,20.805 82 | 781,41.601,30.837,21.350 83 | 782,41.454,31.002,21.914 84 | 783,41.300,31.161,22.486 85 | 784,41.142,31.292,23.026 86 | 785,40.983,31.422,23.586 87 | 786,40.817,31.553,24.140 88 | 787,40.637,31.650,24.659 89 | 788,40.457,31.741,25.163 90 | 789,40.277,31.833,25.660 91 | 790,40.097,31.901,26.111 92 | 791,39.917,31.952,26.558 93 | 792,39.736,32.004,26.997 94 | 793,39.534,32.045,27.390 95 | 794,39.327,32.060,27.765 96 | 795,39.120,32.075,28.099 97 | 796,38.920,32.090,28.424 98 | 797,38.728,32.087,28.726 99 | 798,38.536,32.084,29.015 100 | 799,38.336,32.081,29.304 101 | 800,38.113,32.055,29.600 102 | 801,37.890,32.022,29.896 103 | 802,37.661,31.988,30.171 104 | 803,37.416,31.970,30.417 105 | 804,37.170,31.970,30.662 106 | 805,36.933,31.970,30.883 107 | 806,36.703,31.965,31.066 108 | 807,36.473,31.938,31.249 109 | 808,36.233,31.910,31.425 110 | 809,35.983,31.883,31.546 111 | 810,35.733,31.842,31.668 112 | 811,35.485,31.799,31.789 113 | 812,35.239,31.756,31.876 114 | 813,34.994,31.704,31.955 115 | 814,34.746,31.646,32.034 116 | 815,34.497,31.588,32.077 117 | 816,34.247,31.523,32.089 118 | 817,33.987,31.444,32.101 119 | 818,33.727,31.365,32.107 120 | 819,33.482,31.284,32.098 121 | 820,33.268,31.190,32.088 122 | 821,33.055,31.095,32.070 123 | 822,32.865,31.001,32.004 124 | 823,32.725,30.889,31.937 125 | 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690,50.9475572252111,19.970669663394,9.67689164820247 293 | 691,50.6613047572747,20.2670093164138,9.7577186298403 294 | 692,50.401351511732,20.5661568351549,9.85159156423523 295 | 693,50.1705309325364,20.8679561134716,9.95156740092325 296 | 694,49.9677013580626,21.1722510452182,10.0569460451381 297 | 695,49.7899672593982,21.4788855242491,10.1690124005925 298 | 696,49.6383260560272,21.7877307206402,10.2890513709992 299 | 697,49.5137799064947,22.0988531121176,10.4174428734162 300 | 698,49.4172375952242,22.4124007467864,10.5535315810667 301 | 699,49.3485974702028,22.7285217166711,10.6970662185512 302 | 700,49.3073444636775,22.7285217166711,10.6970662185512 303 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | --------------------------------------------------------------------------------