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热词
    • 2. 发明授权
    • Picture coding and/or decoding equipment
    • 图像编码和/或解码设备
    • US4319267A
    • 1982-03-09
    • US116713
    • 1980-01-30
    • Eiji MitsuyaShinichi MurakamiKatsumi MoriTomio KishimotoTakahiko Kamae
    • Eiji MitsuyaShinichi MurakamiKatsumi MoriTomio KishimotoTakahiko Kamae
    • G06T9/40H04N1/64H04N7/24H04N7/26H04N1/46H04N1/41
    • G06T9/40H04N1/64H04N1/646H04N19/96H04N19/98H04N7/24
    • A color picture is separated into three color component pictures, which are divided respectively by first, second and third block coding means into blocks and encoded. In the first block coding means, one of the color component pictures is encoded, for each block, into gray level codes representing gray level components in the block and a resolution code representing the distribution of the gray level codes in the block. In this case, when the gray level in the block undergoes a little change, an average gray level can be used as the gray level code and the resolution code can be omitted. The second and third block coding means may be identical in construction with the first block coding means. The resolution code of the block obtained by the first block coding means can also be employed in the coding of the corresponding blocks by the second and third block coding means. In the first block coding means, the size of the blocks into which the color component picture is divided is altered locally in accordance with the state of the color component picture. The block size thus changed in the first block coding means can also be used in the coding by the second and third block coding means.
    • 将彩色图像分成三个颜色分量图片,它们分别由第一,第二和第三块编码装置划分成块并被编码。 在第一块编码装置中,对于每个块,颜色分量图像中的一个被编码为表示块中的灰度分量的灰度代码,以及表示块中的灰度级代码的分布的分辨率代码。 在这种情况下,当块中的灰度级稍微改变时,可以使用平均灰度级作为灰度级代码,并且可以省略分辨率代码。 第二和第三块编码装置在结构上可以与第一块编码装置相同。 由第一块编码装置获得的块的分辨率码也可以用于第二和第三块编码装置对相应块的编码。 在第一块编码装置中,根据颜色分量图像的状态,局部地改变分割颜色分量图像的块的尺寸。 在第一块编码装置中由此改变的块大小也可以用于第二和第三块编码装置的编码。