Patent ID: 7729547

Claim:
An image forming apparatus comprising: a decompression unit including circuitry for decompressing image data, the decompression unit configured to decompress first compressed image data; an image processing unit including circuitry for processing image data, the image processing unit configured to process image data decompressed by the decompression unit; a plurality of quantization tables; a quantization table selection unit including circuitry for selecting a quantization table, the quantization table selection unit configured to select, from among the plurality of quantization tables, a quantization table providing a compression ratio lower than a compression ratio of the first compressed image data; and a compression unit including circuitry for compressing image data, the compression unit configured to compress image data processed by the image processing unit, wherein the compression unit forms image data by compressing an image using the quantization table selected by the quantization table selection unit, and wherein the image processing unit executes at least one of rotating and resizing of an image.