Shiwei Wang, Guixiang Zhang, Wei Xu, Yongjie Wu, Shuping Tao. Adaptive Moving Window-Based Non-Uniformity Correction of CMOS Image[J]. Laser & Optoelectronics Progress, 2021, 58(14): 1401003
- Laser & Optoelectronics Progress
- Vol. 58, Issue 14, 1401003 (2021)
Fig. 1. Structure of the CMOS image sensor
Fig. 2. Image collected by the sensor under uniform illumination
Fig. 3. Gray curve of the image. (a) Gray mean value curve of the column; (b) gray curve of the pixels in the column
Fig. 4. Response curve of the image block
Fig. 5. Flow chart of our method
Fig. 6. Principle of the image acquisition system
Fig. 7. Image corrected by our method. (a) Original image; (b) corrected image
Fig. 8. Statistic result of the column gray variance. (a) Before correction; (b) after correction
Fig. 9. Correction results of different window widths. (a) Original image; (b) W=2; (c) W=4; (d) W=8; (e) W=16; (f) W=32
Fig. 10. Correction results of the Fig. 9 (a) by different methods. (a) TPC method; (b) LSFOFC method; (c) our method
Fig. 11. PRNU of the image corrected by different methods
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Table 1. Test indicators of different window widths
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Table 2. Performance parameters of different calibration methods
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