Fig. 1. Relative positions of adjacent pixels in 4 cases. (a) Horizontal direction; (b) vertical direction; (c) right diagonal direction; (d) left diagonal direction

Fig. 2. Cumulative strip-type non-uniform noise

Fig. 3. Function diagram of β(C)

Fig. 4. Comparison of images before and after adding noise. (a) Original image; (b) noisy image

Fig. 5. Correction effects of different methods on simulated non-uniformity. (a) Noisy images; (b) SLTH method; (c) CSAR method; (d) proposed method

Fig. 6. Performance curves of different methods on simulated non-uniformity. (a) RMSE; (b) roughness

Fig. 7. Correction effects of different methods on actual non-uniformity. (a) Noisy images; (b) SLTH method; (c) CASR method; (d) proposed method

Fig. 8. Roughness comparison of different methods on actual non-uniformity