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1. 发明授权

US5125045A Image processing system 失效
标题翻译：图像处理系统
公开(公告)号：US5125045A
公开(公告)日：1992-06-23
申请号：US272447
申请日：1988-11-17
申请人： Tatsuya Murakami , Masaaki Fujinawa , Hiromichi Fujisawa , Hidefumi Masuzaki , Yasuo Kuroshu
发明人： Tatsuya Murakami , Masaaki Fujinawa , Hiromichi Fujisawa , Hidefumi Masuzaki , Yasuo Kuroshu
IPC分类号： G06T3/40 , H04N1/40 , H04N1/405
CPC分类号： H04N1/40075 , G06T3/40 , G06T3/4023 , H04N1/40062 , H04N1/4053
摘要： An image processing system wherein for an inputted composite image composed of a line image and a dither image, both a line image processing and a dither image processing are carried out in parallel, and one of the processed results is selected in accordance with the image region discrimination result. The dither image processing is carried out through data conversion for calculating multivalued gray scale image from the inputted image data, grey scale data conversion for adjusting the gray scale image data so as to match an output device and obtaining such adjusted gray scale image data, and re-binarization for re-binarizing the gray scale image data after subjected to the grey scale conversion. The image region discrimination for discriminating if an image region is of a line image or a dither image is carried out based on a ratio of the number of black or white pixels within the region to the contour line length within the range. An ordered dither image through a screened type dither matrix is discriminated in accordance with a corelation between adjacent pixel trains each having a predetermined number of pixels.
摘要翻译：一种图像处理系统，其中对于由行图像和抖动图像组成的输入合成图像并行地执行行图像处理和抖动图像处理，并且根据图像区域选择一个处理结果歧视结果。通过用于从输入的图像数据计算多值灰度图像的数据转换来执行抖动图像处理，灰度数据转换用于调整灰度图像数据，以匹配输出装置并获得这样调整的灰度图像数据;以及重新二值化，用于灰度转换后灰度图像数据的二次化。基于区域内的黑色或白色像素的数量与该范围内的轮廓线长度的比例来执行用于鉴别图像区域是线图像还是抖动图像的图像区域辨别。通过屏蔽型抖动矩阵的有序抖动图像根据每个具有预定数量像素的相邻像素列之间的对齐来区分。

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