| 摘要 |
<p>PURPOSE:To hold the number of static images to be recorded always to a fixed value by reducing the quantity of information in a peripheral high frequency component and reducing the number of compressively coded codes less than a prescribed value when the number of codes obtained by compressing static image data exceeds the prescribed number of codes. CONSTITUTION:The number of codes obtained from a Huffman coding circuit is measured by a system controller 12, and when the number of codes abtained after compressing an objective image exceeds the prescribed number of codes, arithmetic processing is applied to the peripheral part of the image in stages through a digital filter 8 and a high spatial frequency component is weakened in stages to reduce the quantity of information in the objective image and to adjust the number of codes. In order to execute step-like arithmetic processing, addresses on the screen of an image to be processed are detected, the sort of the filter is changed in accordance with the detected addresses and selected so that the high spatial frequency component is weakened in the outside direction of the image. Consequently, the number of static images to be recorded in a recording medium with prescribed recording capacity can be held always at the fixed value independently of the contents of the static images to be recorded.</p> |
