An image processing apparatus includes: a pattern identification unit configured to perform pattern identification for first image data; a first data conversion unit configured to perform first data conversion for the first image data, after a pattern of the first image data is identified, to generate second image data; a second data conversion unit configured to perform second data conversion for the second image data to generate third image data; and a process selection unit configured to determine whether or not to perform at least one of the pattern identification, the first data conversion, or the second data conversion according to a measured value that is input from an outside or an on/off state of a call mode.