Patent ID: 8405743

Claim:
An image-data processing apparatus, comprising: a writer which writes image data into a memory in a manner according to one of a non-interlaced scanning and an interlaced scanning of each N line (N: an integer of two or more); an updater which updates a cumulative zoom coefficient by accumulating, for each line, a decimal portion of the cumulative zoom coefficient to a first numerical value corresponding to the zoom coefficient; an accumulator which accumulates, for each line, a second numerical value corresponding to an integer portion of the cumulative zoom coefficient; a reader which reads out data in a line corresponding to an accumulated value of said accumulator, out of the image data accommodated in the memory by the writer; a first setter which sets N times of the zoom coefficient to the first numerical value, corresponding to the non-interlaced scanning, and which sets the zoom coefficient to the first numerical value, corresponding to the interlaced scanning; and a second setter which sets the integer portion to the second numerical value, corresponding to the non-interlaced scanning, and sets N times of the integer portion to the second numerical value, corresponding to the interlaced scanning.