Patent ID: 8736719

Claim:
An image processing apparatus for applying recursive noise reduction to a moving image having a predetermined frame rate, the image processing apparatus comprising; a computation unit that computes information indicating at degree of correlation between a current frame and a previous frame that is one frame before the current frame, using a pixel value of the current frame to which the recursive noise reduction is to be applied and a pixel value of the previous frame to which the recursive noise reduction has been applied; a determination unit that determines a recursive coefficient, which is a weight of the previous frame, based on the degree of correlation and the frame rate; a first combination unit that combines pixels in the previous frame and the current frame using the recursive coefficient; and an output unit that outputs the frame obtained by the first combination unit as the current frame to which the recursive noise reduction has been applied, wherein for the same degree of correlation indicated by the information computed by the computation unit, the determination unit determines the recursive coefficient of a first value if the frame rate is a first frame rate, and determines the recursive coefficient of a second value being smaller than the first value if the frame rate is a second frame rate being lower than the first frame rate.