Acta Optica Sinica, Volume. 44, Issue 4, 0411001(2024)
Calibration Method of Camera Response Function Based on Multi-Exposure Image Sequence
Figures & Tables(10)
Fig. 2. CRF calibration results for Office data set. (a) Traditional calibration method; (b) improved calibration method
Fig. 4. CRF calibration results for Window data set. (a) Traditional calibration method; (b) improved calibration method
Fig. 5. Relative quantum absorptivity versus wavelength for three color channels of Sony IMX265 color CMOS
Table 1. Partial calibration data sets resulting from three data selection methods
View tableTable 1. Partial calibration data sets resulting from three data selection methods
Regular Grossberg Random 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 — — — 36 91 194 — — — — 24 81 — — — 36 117 219 — — 31 87 189 — — — — — 25 83 — 32 102 217 — — — — — 28 89 185 — — — 21 71 171 — 83 178 — — — — — 22 77 177 — — — — 21 72 173 — — 85 136 228 — — — — 22 79 181 — — 21 71 169 — — — 61 158 — — — — — 27 101 201 — 21 70 172 — — — — 54 146 — — — — 25 89 189 — 23 109 209 — — — — — 66 167 — — — — — 39 125 216 33 139 232 — — — — 29 89 186 — —
Table 2. Selected data sets for improved calibration method
View tableTable 2. Selected data sets for improved calibration method
Adjacent exposure level 1-2 2-3 3-4 4-5 5-6 53 101 33 77 64 97 101 147 145 226 21 64 27 69 66 99 96 143 139 229 42 93 43 92 67 102 110 157 97 173 55 107 38 84 85 128 146 191 137 224 51 103 106 178 92 133 67 99 84 160 46 96 37 78 42 76 181 225 123 201 20 53 48 100 92 136 54 85 96 172 22 65 63 118 169 212 62 93 54 107
Table 3. Exposure ratio between images of different exposure levels for Office data set
View tableTable 3. Exposure ratio between images of different exposure levels for Office data set
Method Channel Exposure ratio 1/2 2/3 3/4 4/5 5/6 Traditonal
method
B-channel 0.3194 0.3568 0.6374 0.6684 0.5174 G-channel 0.2652 0.3576 0.6115 0.6130 0.4455 R-channel 0.1688 0.3066 0.5618 0.5549 0.4098 Improved
method
B-channel 0.4953 0.5344 0.6804 0.6840 0.5119 G-channel 0.4734 0.4933 0.6488 0.6553 0.5319 R-channel 0.4455 0.4741 0.6247 0.6386 0.4931
Table 4. Exposure ratio between images of different exposure levels for Window data set
View tableTable 4. Exposure ratio between images of different exposure levels for Window data set
Method Channel Exposure ratio 1/2 2/3 3/4 4/5 5/6 Traditonal
method
B-channel 0.6013 0.5420 0.5360 0.5260 0.5417 G-channel 0.4818 0.4670 0.4898 0.4923 0.4930 R-channel 0.5339 0.4952 0.5187 0.5066 0.5054 Improved
method
B-channel 0.5510 0.5329 0.5470 0.5429 0.5327 G-channel 0.5176 0.4996 0.5117 0.5021 0.4889 R-channel 0.5218 0.5100 0.5181 0.5106 0.5104
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Liuzheng Gao, Banglei Guan, Ang Su, Zhang Li, Qifeng Yu. Calibration Method of Camera Response Function Based on Multi-Exposure Image Sequence[J]. Acta Optica Sinica, 2024, 44(4): 0411001
Paper Information
Category: Imaging Systems
Received: Oct. 23, 2023
Accepted: Dec. 11, 2023
Published Online: Feb. 23, 2024
The Author Email: Guan Banglei (banglei.guan@hotmail.com), Su Ang (suang2008@126.com)
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