Seiko Epson Corporation

Mariko Watanabe

Toshiaki Isobe

An image forming apparatus for compressing image data, includes: a compression unit that reduces data into a predetermined bit number per band of image data so as to satisfy a condition related to a predetermined compression and compresses the reduced data; a specifying unit that specifies a minimum bit number among the predetermined bit numbers applied to the bands and specifies bands which are not compressed by the minimum bit number; and a re-compression unit that performs re-compression on the specified bands so that the data is compressed by the minimum bit number.

Image forming apparatus

An image processing device configured to compress image data to be used for printing with a plurality of compression levels having different compression rates includes a former stage compression unit, a storing unit and a latter stage compression unit. The latter stage compression unit is configured, after the former stage compression unit finishes compressing all of the areas, to recompress each of areas of a latest compression level at the moment being different from a compression level stored in the storing unit with the latest compression level.

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Shiojiri, Japan

Mariko Watanabe