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公开(公告)号：US4736315A
公开(公告)日：1988-04-05
申请号：US722559
申请日：1985-04-12
申请人： Tohru Ozaki , Takashi Toriu , Hiromichi Iwase
发明人： Tohru Ozaki , Takashi Toriu , Hiromichi Iwase
CPC分类号： G06T7/401 , G06T7/0002 , G06T2207/30168
摘要： An apparatus for evaluating density-evenness of patterns printed on an article includes a circuit for calculating density distribution of the image data in each segment; a circuit for normalizing the density distribution with an area of effective image data in each segment; and a circuit for quantifying the density and evenness of the patterns.
摘要翻译： 用于评估印刷在物品上的图案的密度均匀性的装置包括用于计算每个片段中的图像数据的浓度分布的电路; 用于在每个段中用有效图像数据的区域归一化密度分布的电路; 以及用于量化图案的密度和均匀性的电路。
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2.发明授权
公开(公告)号：US4908872A
公开(公告)日：1990-03-13
申请号：US153426
申请日：1988-02-05
申请人： Takashi Toriu , Hiromichi Iwase
发明人： Takashi Toriu , Hiromichi Iwase
CPC分类号： G06T7/0083 , G06K9/4609 , G06K9/56 , G06T2200/28
摘要： This invention relates to a method and apparatus for extracting contour lines from a pattern obtained in image processing. The disclosed method and apparatus makes it possible to obtain the contour lines in real-time and, moreover, can be easily incorporated into hardware. To achieve these objects, a invention applies the simplified discrimination method for selecting pixels, which form the pattern contour, wherein each pixel is examined within groups of pixel, i.e. X-axis and Y-axis groups. The magnitude of a gray level gradient of each pixel is compared with those of neighboring pixels located in either direction of X-axis group or Y-axis. The pixel which has the maximum magnitude of gray level gradient among those of adjacent pixels is discriminated from each group as contour date. This discrimination method is simple and remarkably improved. When contour lines for two groups are combined, the pattern contours can be easily obtained.
摘要翻译： 用于从图像处理中获得的图案中提取轮廓线的方法和装置，这使得可以高速实时地获得轮廓线，并且还可以容易地利用硬件。 在本发明的实施例中，采用用于选择形成图案轮廓的那些像素的简化识别方法。 像素被分成两组，分别是X轴和Y轴组，或者换句话说，给出两个表示，X轴表示和Y轴表示。 关于每个组或表示，将每个像素的灰度级梯度的大小与相对于所考虑的像素处于X轴方向或Y轴方向的相邻像素的大小进行比较，并且具有最大值的像素 区分相邻像素之间的灰度梯度的大小。 这种辨别方法简单，可以提供显着的改进处理。 当对于两组确定轮廓线进行组合时，可以容易地获得图案轮廓。
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公开(公告)号：US4791678A
公开(公告)日：1988-12-13
申请号：US161274
申请日：1988-02-22
申请人： Hiromichi Iwase , Shigeru Sasaki , Toshiyuki Gotoh , Takashi Toriu , Tohru Ozaki
发明人： Hiromichi Iwase , Shigeru Sasaki , Toshiyuki Gotoh , Takashi Toriu , Tohru Ozaki
CPC分类号： G06T5/20
摘要： An image processing system mainly used in an image verification system for detecting and correcting distortion of an input image includes the following devices; an image memory for storing a digitized image before, during, and after correction, a working memory for temporarily storing intermediate data of the image on correction, density level extension devices for extending the density level or gradation of the image by repeatedly reading out the contents of the image memory and the working memory by using a matrix window containing picture elements of the image, a density slope detection device for detecting the extended density level and calculating a density slope or gradient by using the matrix window, and a correction device for correcting density distribution and line width of the image based on the extended density level and the calculated density slope.
摘要翻译： 主要用于检测和校正输入图像失真的图像验证系统中的图像处理系统包括以下装置; 用于在校正之前，之中和之后存储数字化图像的图像存储器，用于临时存储修正图像的中间数据的工作存储器，用于通过重复读出内容来扩展图像的浓度级或灰度级的浓度级扩展装置 通过使用包含图像的图像的矩阵窗口的图像存储器和工作存储器，密度斜率检测装置，用于通过使用矩阵窗口来检测扩展密度级别并计算密度斜率或梯度;以及校正装置， 基于扩展密度水平和计算密度斜率的图像的密度分布和线宽。
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