Method of processing pixels with binary or multibit error diffusion
    21.
    发明授权
    Method of processing pixels with binary or multibit error diffusion 失效
    用二进制或多位错误扩散处理像素的方法

    公开(公告)号:US06552824B2

    公开(公告)日:2003-04-22

    申请号:US09213636

    申请日:1998-12-17

    IPC分类号: G06F1500

    摘要: A method is described of processing image data of pixels to be rendered. In the method, image data representing a pixel to be rendered is provided. Criteria or tests are established for processing the pixel in accordance with binary error diffusion or multibit error diffusion. In response to examination of the pixel in accordance with the criteria, a decision is made as to whether the pixel is to be rendered in accordance with binary error diffusion or multibit error diffusion. The pixel is then rendered in accordance with the decision.

    摘要翻译: 描述了处理要渲染的像素的图像数据的方法。 在该方法中,提供表示要渲染的像素的图像数据。 根据二进制误差扩散或多位误差扩散来建立标准或测试来处理像素。 响应于根据标准检查像素,作出关于是否根据二进制误差扩散或多位误差扩散来渲染像素的决定。 然后根据该决定渲染像素。

    Method and apparatus for increasing compressibility of multibit image
data with the LSB value determined in the thresholding operation based
on pixel position
    22.
    发明授权
    Method and apparatus for increasing compressibility of multibit image data with the LSB value determined in the thresholding operation based on pixel position 失效
    基于像素位置在阈值操作中确定的LSB值增加多位图像数据的压缩性的方法和装置

    公开(公告)号:US5689588A

    公开(公告)日:1997-11-18

    申请号:US582319

    申请日:1996-01-03

    CPC分类号: H04N19/184 H04N19/30

    摘要: A method and apparatus for processing image data of pixels to be rendered for efficient storage in a memory or efficient transmission wherein a grey level value of a rendered pixel is represented by multiple bits including a most significant bit (MSB) and a least significant bit (LSB). The method and apparatus provide for modifying of the density values of successive pixels in accordance with an error diffusion operation. The modified density values are then subject to a thresholding operation wherein the thresholding operation employs position of a pixel to determine the digital value of the LSB of the rendered pixel. There is thereby provided a pattern structure to the LSB data. The rendered pixel values may then be compressed to provide for efficient storage in a memory or for efficient transmission over a communication pathway. The invention thus relates to improving the compressibility of the total image data by imparting structure to at least rendered image data where the error diffusion process would normally remove any structure to the LSB's of the image.

    摘要翻译: 一种用于处理要渲染以用于在存储器或有效传输中有效存储的像素的图像数据的方法和装置,其中渲染像素的灰度级值由包括最高有效位(MSB)和最低有效位 LSB)。 该方法和装置提供了根据误差扩散操作来修改连续像素的浓度值。 修改的浓度值然后进行阈值操作,其中阈值操作使用像素的位置来确定渲染像素的LSB的数字值。 从而为LSB数据提供了一种模式结构。 然后可以将渲染的像素值压缩以提供存储器中的有效存储器或通过通信路径的有效传输。 因此,本发明涉及通过将结构赋予至少渲染图像数据来提高总图像数据的可压缩性,其中误差扩散处理通常将任何结构去除到图像的LSB。