| 摘要 |
<p>PROBLEM TO BE SOLVED: To highly efficiently output image information with high image quality representing a difference between patterns of divided areas of coded image information consisting of three primary colors in the case of sending the coded image information via a telephone line or the like to a decoding section and decoding the information. SOLUTION: An image information coding section 2-3 extracts image information Yr in R color of image information Y and the information area is divided into two triangles by one diagonal line. Image information Hs of one point S is read for one triangle A'. Let approximated image information at the point S be H's, image information sets of three apexes L, M, N be Hl, Hm, Hn and an area of a triangle beΔLMN, then the approximated image information is expressed in equation. Then a square error of a difference between the information Hs and the approximated image information H's is obtained. The coding section 2-3 obtains the sum of square errors for all points included in the triangle A' and divides the triangle when the sum exceeds a threshold level to continue the comparison and the processing is terminated when the sum does not exceed the threshold level. Then the image is decoded by an image decoding section 2-5 and displayed by a display section 2-6.</p> |
