| 摘要 |
PURPOSE:To reduce the number of times of accessing an image memory and to speed up image expansion processing in affine conversion by storing a frequency of using input image data in a data memory of a pipe line processor. CONSTITUTION:From an input magnification ratio, the number of times of accessing the same address by image memory 1 is calculated and stored in a data memory 34 of a pipe line processor 3. Next, an address of image memory 1 in which output data is to be written is calculated. Further, data is read from image memory 1, and a processing unit 36 converts read data into output data nd is stored in image memory 1. Furthermore, input data read out in advance is used to prepare output data, the average value of the data is used to correct the data repeatedly. With this, the number of times of accessing the image memory is reduced and image expansion processing in affine conversion is speeded up. |
