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    • 1. 发明申请
    • IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD
    • 图像处理装置和图像处理方法
    • US20120050815A1
    • 2012-03-01
    • US13208716
    • 2011-08-12
    • Shigeo KodamaHisashi Ishikawa
    • Shigeo KodamaHisashi Ishikawa
    • H04N1/40
    • H04N1/4052
    • When the pixel of interest exists at a pixel position where reference of an error buffer is necessary, a quantization error generated in a region having undergone error diffusion processing is obtained from the error buffer. A quantization error generated in error diffusion processing in a region containing the pixel of interest is obtained from an error memory. Diffusion errors are calculated from the quantization errors using an error diffusion matrix. The value of the pixel of interest and the diffusion errors are added, and the addition value is quantized into the quantization value of the pixel of interest. The difference between the quantization value and the addition value is calculated as a quantization error to be stored in the error memory. When the pixel of interest exists at a pixel position where write in the error buffer is necessary, the quantization error is stored in the error buffer.
    • 当感兴趣像素存在于需要误差缓冲器的基准的像素位置时,从误差缓冲器获得在经过误差扩散处理的区域中产生的量化误差。 从错误存储器获得在包含感兴趣像素的区域中的误差扩散处理中产生的量化误差。 使用误差扩散矩阵从量化误差计算扩散误差。 增加感兴趣像素的值和扩散误差,并将相加值量化为感兴趣像素的量化值。 计算量化值与相加值之间的差值作为量化误差被存储在误差存储器中。 当感兴趣的像素存在于需要在错误缓冲器中写入的像素位置时,量化误差被存储在误差缓冲器中。
    • 2. 发明授权
    • Image processing apparatus and image processing method for performing error diffusion processing for each region of an image
    • 用于对图像的每个区域进行误差扩散处理的图像处理装置和图像处理方法
    • US08947735B2
    • 2015-02-03
    • US13208716
    • 2011-08-12
    • Shigeo KodamaHisashi Ishikawa
    • Shigeo KodamaHisashi Ishikawa
    • G06K15/00H04N1/405
    • H04N1/4052
    • When the pixel of interest exists at a pixel position where reference of an error buffer is necessary, a quantization error generated in a region having undergone error diffusion processing is obtained from the error buffer. A quantization error generated in error diffusion processing in a region containing the pixel of interest is obtained from an error memory. Diffusion errors are calculated from the quantization errors using an error diffusion matrix. The value of the pixel of interest and the diffusion errors are added, and the addition value is quantized into the quantization value of the pixel of interest. The difference between the quantization value and the addition value is calculated as a quantization error to be stored in the error memory. When the pixel of interest exists at a pixel position where write in the error buffer is necessary, the quantization error is stored in the error buffer.
    • 当感兴趣像素存在于需要误差缓冲器的基准的像素位置时,从误差缓冲器获得在经过误差扩散处理的区域中产生的量化误差。 从错误存储器获得在包含感兴趣像素的区域中的误差扩散处理中产生的量化误差。 使用误差扩散矩阵从量化误差计算扩散误差。 增加感兴趣像素的值和扩散误差,并将相加值量化为感兴趣像素的量化值。 计算量化值与相加值之间的差值作为量化误差被存储在误差存储器中。 当感兴趣的像素存在于需要在错误缓冲器中写入的像素位置时,量化误差被存储在误差缓冲器中。