| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of realizing a high-speed electronic sorting function at a low cost without incurring performance degradation to be a problem at the time of executing the electronic sorting function in a color digital copying machine or a high-speed monochromatic digital copying machine. SOLUTION: The color digital copying machine is provided with the electronic sorting function; for reading the images of an original by a scanner 21, inputting them as image data, compressing the inputted image data in a compression/ expansion part 17, storing them in a hard disk device 14, then reading compressed data from the hard disk device 14, expanding them to the image data in the compression/expansion part 17, developing them in a page memory 16, then sending them to a printer engine 22 and forming the images. In the case that the volume of the compressed data after a compression processing in the compression/expansion part 17 exceeds a prescribed capacity, affecting the performance of the electronic sorting function, the compressed data are not stored in the hard disk device 14 but are stored in a semiconductor memory 12. |
