Image analysis – Image compression or coding – Quantization
Patent
1996-01-19
2000-09-12
Lee, Thomas D.
Image analysis
Image compression or coding
Quantization
382162, 358447, 358448, 358530, G06K 936, G06K 938, G06K 946
Patent
active
061189057
ABSTRACT:
An image processing apparatus detects, in step 1, whether or not differences between currently supplied image data and image data of a previous pixel are more than a predetermined value m, and identifies a border of a computer-created image or a natural image, where a brightness level differs from the remaining area of the image, when the differences are more than the predetermined value m. Conversely, when the differences are less than the predetermined value m, the image processing apparatus checks, in step 2, whether image data at a pixel before and a pixel two before the current pixel are identical with respect to the color components constituting the color image. When the differences are not all zero, it is checked whether or not the image data at a pixel before the current pixel and the image data at the current pixel are all zero. When the image data are not identical, the color image is identified as being a natural image. When the image data are identical, the color image is identified as being a computer-created image. In step 3, the computer-created image is checked as to whether it is a 2-pixel checkered image.
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Fujioka Makoto
Kitagawa Makoto
Kobayashi Mitsugu
Saiki Kenji
Tsutsui Yusuke
Lee Thomas D.
Sanyo Electric Co,. Ltd.
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