Patent ID: 7911514
Filing Date: 2011-03-22
Classification: H04N

Abstract:
1. A defective pixel correction device comprising: a circuit for receiving pixel data from a sensor; a circuit for obtaining an estimated pixel value of a pixel of interest from pixel data of neighboring pixels of said pixel of interest; a circuit for obtaining a differential value between a sensor-input pixel value of said pixel of interest and said estimated pixel value; a modulation circuit for modulating said differential value by said estimated pixel value, thereby obtaining a modulated differential value; and a circuit for comparing said modulated differential value and a predetermined threshold value, and when said modulated differential value is greater than said threshold value, outputting said estimated pixel value as a pixel value of said pixel of interest instead of said sensor-input pixel value, wherein said modulation circuit contains a circuit for calculating a coefficient using said estimated pixel and a predetermined function of brightness versus pixel value, and said modulation circuit modulating said differential value by said coefficient.