Optical Instruments, Volume. 45, Issue 2, 1(2023)
Measurement and analysis of the focal plane opto-electronic conversion functions for digital single lens reflex cameras
Figures & Tables(7)
Fig. 3. Deviation analysis of digital camera focal plane OECF measurement data（using JPEG format）
Fig. 4. Camera focal plane OECF and measurement deviation under different sizes of pixel areas（using JPEG format）
Fig. 5. linear response of camera raw data to focal plane exposure
Table 1. OECF of digital camera focal plane（with the camera lens removed, JPEG format）
View tableView in ArticleTable 1. OECF of digital camera focal plane（with the camera lens removed, JPEG format）
对数曝光量 lg(Hm/H0)/lg(lx·s) 数字输出值 V R G B −2.65 3.4 3.2 2.7 −2.35 6.6 6.3 5.5 −2.05 14.9 12.6 10.6 −1.74 30.3 24.5 21.0 −1.44 58.1 46.6 39.9 −1.14 102.8 85.1 75.7 −0.82 160.2 138.5 126.1 −0.52 215.6 192.4 180.0 −0.25 254.5 234.6 225.3 0.05 255.0 255.0 253.0
Table 2. Deviation analysis of G-channel digital output in di–gital camera focal plane OECF measurement（using JPEG format）
View tableView in ArticleTable 2. Deviation analysis of G-channel digital output in di–gital camera focal plane OECF measurement（using JPEG format）
快门时间/s 测量均值 最大正偏差 最大负偏差 平均偏差 单次测量标准偏差 算术平均值标准偏差 相对平均偏差 相对标准偏差 1/4000 3.22 0.24 −0.45 0.16 0.05 0.02 5.01% 6.71% 1/2000 6.34 0.49 −0.37 0.24 0.08 0.03 3.71% 4.54% 1/1000 12.62 1.02 −0.73 0.38 0.27 0.09 3.03% 4.08% 1/500 24.47 1.67 −1.43 0.81 1 0.33 3.31% 4.08% 1/250 46.63 2.5 −2.25 1.15 2.23 0.77 2.47% 3.20% 1/125 85.06 1.19 −2.64 0.93 1.56 0.52 1.09% 1.47% 1/60 138.55 2.91 −3.9 1.81 5.04 1.68 1.31% 1.62% 1/30 192.42 1.48 −2.73 1.14 1.96 0.65 0.59% 0.73% 1/16 234.56 0.82 −1.74 0.65 0.72 0.24 0.28% 0.36% 1/8 255 0 −0.01 0 0 0 0.00% 0.00% 平均值 0.727 1.291 0.433 2.08% 2.68%
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Weige LYU, Ke FENG, Xiaodong ZHENG. Measurement and analysis of the focal plane opto-electronic conversion functions for digital single lens reflex cameras[J]. Optical Instruments, 2023, 45(2): 1
Paper Information
Category: TESTING TECHNOLOGY
Received: Mar. 21, 2022
Accepted: --
Published Online: Jun. 12, 2023
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