Patent ID: 9197871
Filing Date: 2015-11-24
Classification: H04N

Abstract:
1. A signal processing device comprising a correction processing unit configured to (i) acquire pixel signals from a sensor on which pixels are disposed in an array in which a spatial frequency of color pixels of a first color which are pixels acquiring color components via first filters is lower than a spatial frequency of luminance pixels which are pixels acquiring luminance components via second filters, and (ii) correct a pixel signal from a defective pixel out of the pixels of the sensor, the correction processing unit including: (a) a correction reference decision unit configured to decide to use a maximum value of the pixel signals of the luminance pixels that are located one-pixel pitch away from the color pixel to be processed or a maximum value of the pixel signals of a pair of nearest color pixels of the first color among pixel signals of pixels within a predetermined range from the color pixel to be processed as a correction reference value that serves as a reference when the pixel signal of the color pixel to be processed is corrected, (b) a luminance fluctuation width decision unit configured to decide to use a maximum value among an absolute value of a difference of the pixel signals of the pair of nearest color pixels of the first color, an increased amount of the plurality of luminance pixels disposed on one side of the color pixel to be processed, and an increased amount of the plurality of luminance pixels disposed on another side of the color pixel to be processed as a luminance fluctuation width, and (c) a defect correction value computation unit configured to compute a defect correction value to correct the pixel signal of the defective pixel by adding the luminance fluctuation width decided by the luminance fluctuation width decision unit to the correction reference value decided by the correction reference value decision unit.