Patent ID: 8335376

Claim:
An image processing apparatus that corrects an image signal including a plurality of color signals, comprising: a separation unit that separates the image signal into two or more subband signals including a first subband signal and a second subband signal; a selection unit that selects a correction processing subject color signal from the plurality of color signals; a noise estimation unit that estimates a noise amount relative to either one of the image signal and the first subband signal; an S/N estimation unit that estimates a signal to noise ratio in relation to the first subband signal of the correction processing subject color signal selected by the selection unit, wherein the S/N estimation unit estimates the signal to noise ratio based on the noise amount; a coefficient setting unit that sets a coefficient based on the estimated signal to noise ratio; and a correction unit that performs correction processing on the first subband signal of the selected correction processing subject color signal by adding the first subband signal of the selected correction processing subject color signal to the second subband signal of another color signal not subject to the correction processing based on the coefficient.