[1] Cauwerts C, Deneyer A, Bodart M. Comparison of the vignetting effects of two identical fisheye lenses[J]. Leukos, 2012, 8(3): 181-203.
[2] Yu W. Practical anti-vignetting methods for digital cameras[J]. IEEE Trans. on Consumer Electronics, 2004, 50(4): 975-983.
[3] Zheng Y, Lin S, Kang S B, et al. Single-image vignetting correction from gradient distribution symmetries[J]. IEEE Trans. on Pattern Analysis and Machine Intelligence, 2012, 35(6): 1480-1494.