| 摘要 |
<p>An optimal image-quality selection apparatus includes a quantizer (2) to quantize the image from a scanner. The quantizer outputs video signals (b1, b2) representing the image at different depth levels. Graphic blocks are extracted by extractors (3, 4) and counters (5 - 8) count for each video signal the total number of graphic blocks (e1 and e2) and the number (f1 and f2) of graphics blocks having a predetermined size. Dividers (9, 10) calculate the ratio (f1/e1 and f2/e2 respectively) of the number of graphic blocks having a predetermined size to the number of all graphic blocks of the image for each of the depth levels of colour, and a comparator (11) selects the image having the largest of the ratios as an image of optimal quality.</p> |
