Patent ID: 8335372

Claim:
An image enlargement method, comprising: a) an input step of inputting a pixel signal of a predetermined color space, which has one color component per pixel; b) a correlation direction calculation step of obtaining a correlation direction of each pixel; c) a color component interpolation step of interpolating a signal of other color component in said predetermined color space for each pixel by using pixels relating to said correlation direction; d) an image enlargement step of generating an enlarged image by interpolating a pixel signal for enlargement; e) a correlation direction interpolation step of interpolating said correlation direction on each pixel generated by interpolation for enlargement by using said correlation direction obtained in said correlation direction calculation step b); and f) a filtering step of performing a filtering process on a pixel existing before execution of said image enlargement step d) in consideration of said correlation direction obtained in said correlation direction calculation step b) or on a pixel generated in said image enlargement step d) in consideration of said correlation direction interpolated in said correlation direction interpolation step e).