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    • 2. 发明授权
    • Graphics processing apparatus for smoothing edges of images
    • 用于平滑图像边缘的图形处理装置
    • US5357583A
    • 1994-10-18
    • US914746
    • 1992-07-16
    • Takashi SatoHiroki KubozonoHitomi KumazakiMasaki SanoKan TomitaYoshiaki Hanyu
    • Takashi SatoHiroki KubozonoHitomi KumazakiMasaki SanoKan TomitaYoshiaki Hanyu
    • G06K15/12H04N1/409G06K9/00
    • H04N1/4092G06K15/1223
    • A graphics processing apparatus includes a first detection part for detecting, with respect to each pixel of an image, whether or not an edge of the image starts on a scanline, and for setting a control data depending on whether or not the edge starts on the scanline, a second detection part for detecting a duration of beam power modulation corresponding to one or plural edge pixels being intersected by a line defined in the image, and for setting a duration data, a third detection part for detecting an outermost edge pixel in the edge pixels, a part for generating a beam power data indicating an intensity level of light beam power corresponding to the outermost edge pixel, an output part for outputting the image by means of a printer having a light source for emitting a light beam, and a control means for continuously modulating light beam power of the light source from the intensity level to a predetermined level with respect to the edge pixels, so that an image with smooth edges is generated by modulating the light beam power of the light source in accordance with the control data and the duration data.
    • 图形处理装置包括第一检测部分,用于相对于图像的每个像素检测图像的边缘是否在扫描线上开始,并且根据边缘是否开始在扫描线上开始来设置控制数据 扫描线,第二检测部分,用于检测对应于由图像中定义的线相交的一个或多个边缘像素的波束功率调制的持续时间,以及用于设置持续时间数据;第三检测部分,用于检测第一检测部分中的最外边缘像素 边缘像素,用于产生指示与最外边缘像素对应的光束功率的强度水平的光束功率数据的部分,用于通过具有用于发射光束的光源的打印机输出图像的输出部分,以及 用于将光源的光束功率从强度水平相对于边缘像素连续调制到预定水平的控制装置,使得具有平滑边缘的图像是 通过根据控制数据和持续时间数据调制光源的光束功率而产生。