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1. 发明授权

US4878125A Method and apparatus for image processing with fed-back error correction 失效
标题翻译：具有反馈误差校正的图像处理方法和装置
公开(公告)号：US4878125A
公开(公告)日：1989-10-31
申请号：US140029
申请日：1987-12-31
申请人： Akihiro Katayama , Hidefumi Ohsawa , Izuru Sunohara , Hiroshi Hosokawa , Masahiko Yoshimoto
发明人： Akihiro Katayama , Hidefumi Ohsawa , Izuru Sunohara , Hiroshi Hosokawa , Masahiko Yoshimoto
IPC分类号： G06T5/00 , H04N1/405 , H04N1/52 , H04N7/26
CPC分类号： H04N19/90 , G06T7/0083 , H04N1/4052 , H04N1/52 , G06T2207/10008
摘要： There is an image processing apparatus for digitally processing an image. This apparatus comprises: a binarization circuit to binarize image data by a predetermined threshold value; a processor to correct errors generated in binarization; a first detector to detect an edge direction of the image from the image data; and a second detector to detect an edge quantum of the image from the image data. The process corrects the error data in accordance with the edge direction detected by the first detector or the edge quantum detected by the second detector. The errors to be corrected by the processor are the errors between the output concentration data after the binarization and the image concentration data. The processor adds weight coefficients to the error data in a predetermined range stored in a memory and then adds the weighted error data to image data to be newly binarized. The sum of the weight coefficients which are used in the weighting process is set to "1". With this apparatus, a high quality apparatus can be reproduced with a high fidelity from an original including many edges.
摘要翻译：存在用于数字处理图像的图像处理装置。该装置包括：将图像数据二值化预定阈值的二值化电路; 处理器，用于校正二值化中产生的错误; 第一检测器，用于从图像数据检测图像的边缘方向; 以及第二检测器，用于从图像数据检测图像的边缘量子。该过程根据由第一检测器检测到的边缘方向或由第二检测器检测到的边缘量子来校正误差数据。处理器要纠正的错误是二值化后的输出浓度数据与图像浓度数据之间的误差。处理器将加权系数加到存储在存储器中的预定范围内的误差数据上，然后将加权的误差数据加到新二进制化的图像数据上。在加权处理中使用的加权系数的和被设置为“1”。利用该装置，可以从包括许多边缘的原稿以高保真度再现高质量的装置。

2. 发明授权

US5068746A Image processing apparatus 失效
公开(公告)号：US5068746A
公开(公告)日：1991-11-26
申请号：US394865
申请日：1989-08-17
申请人： Hidefumi Ohsawa , Akihiro Katayama , Hiroshi Hosokawa , Izuru Sunohara , Masahiko Yoshimoto
发明人： Hidefumi Ohsawa , Akihiro Katayama , Hiroshi Hosokawa , Izuru Sunohara , Masahiko Yoshimoto
IPC分类号： G06K9/38 , H04N1/405 , H04N1/52
CPC分类号： H04N1/52 , G06K9/38 , H04N1/4052 , G06K2209/01
摘要： An image processing apparatus for digitizing an analog image by dispersing the digitizing error to the surrounding areas. The characteristics or edge of the analog imnage are identified, and the error dispersing area is varied according to the result of identification, thus enabling reproduction of the image with high quality regardless of the nature of the original image.

3. 发明授权

US4876610A Image processing apparatus with binarization-error dispersal 失效
标题翻译：具有二值化误差分散的图像处理装置
公开(公告)号：US4876610A
公开(公告)日：1989-10-24
申请号：US137439
申请日：1987-12-23
申请人： Hidefumi Ohsawa , Akihiro Katayama , Hiroshi Hosokawa , Izuru Sunohara , Masahiko Yoshimoto
发明人： Hidefumi Ohsawa , Akihiro Katayama , Hiroshi Hosokawa , Izuru Sunohara , Masahiko Yoshimoto
IPC分类号： G06K9/38 , H04N1/405 , H04N1/52
CPC分类号： H04N1/52 , G06K9/38 , H04N1/4052 , G06K2209/01
摘要： An image processing apparatus for digitizing an analog image by dispersing the digitizing error to the surrounding areas. The characteristics or edge of the analog image are identified, and the error dispersing area is varied according to the result of identification, thus enabling reproduction of the image with high quality regardless of the nature of the original image.
摘要翻译：一种图像处理装置，用于通过将数字化误差分散到周围区域来数字化模拟图像。识别模拟图像的特征或边缘，并且根据识别结果改变误差分散区域，从而能够以高质量再现图像，而与原始图像的性质无关。

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