Patent ID: 9740958
Date: 2017-08-22
CPC Classifications: G06K,G06T

Claim:
1. A method for vignetting correction on an image, performed in an apparatus for correcting vignetting effects of the image, the method comprising: receiving a two-dimensional (2D) image; calculating a radial bright channel representing intensity of the 2D image; estimating a vignetting function of the 2D image having similarity to the calculated radial bright channel; and correcting the vignetting effects of the 2D image by using the estimated vignetting function, wherein the estimating a vignetting function comprises: estimating an one-dimensional (1D) vignetting function having maximum similarity to the intensity which the radial bright channel represents; obtaining values corresponding to a plurality of parameters included in the 1D vignetting function by analyzing the radial bright channel; and estimating the vignetting function of the 2D image by inputting the obtained values into the respective plurality of parameters of the 1D vignetting function.