| 摘要 |
PURPOSE:To improve density conversion processing performance, and to make processing time constant in a double image data density conversion processing system to be used in an electronic sentence filing system, etc. CONSTITUTION:At the time of processing data on an input image data storage area 2-1 by a designated density conversion scale factor, in the case that the scale factor of a vertical direction is enlargement, one line of input image data is density-converted by the scale factor of a horizontal direction, and a result is inputted once to a work buffer 2-2, and the portion of the scale factor of the vertical direction is copied from the work buffer 2-2 to an output area 2-3. In the case of reduction, one line of the input image data is density- converted by the scale factor of the horizontal direction, and the result is outputted directly to the output area 2-3, and at the time of setting a next input image data storage area address, the address is determined by skipping some number of the lines of the portion of the scale factor. The processing at the time of the enlargement and at the time of the reduction is executed differently in this way. |
