Patent ID: 7321452

Claim:
An image processing apparatus which carries out the processing of generating, from analog image signals inputted for individual lines in a main scanning direction, binary image data in which the lines are sequentially arranged in a sub-scanning direction, comprising: analog/digital conversion means for converting analog image signals of each individual line to a plurality of predetermined bits of multivalued digital signals; multivalued image storing means for storing one line of image data at a time, the multivalued image storing means being configured to store the multivalued digital signals of each individual line of image data obtained by conversion of the analog image signals of said each individual line by the analog/digital conversion means; and binarization processing means which is capable of binarization processing of image data of one line, said one line being obtained from one of the analog/digital conversion means and the multivalued image storing means, the multivalued digital signals of the one line of image data stored in the multivalued image storing means being used when interpolation processing between lines is performed.