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1. 发明公开

EP0469835A3 Image processing apparatus and method 失效
标题翻译：图像处理设备和方法
公开(公告)号：EP0469835A3
公开(公告)日：1994-01-05
申请号：EP91306942.3
申请日：1991-07-29
申请人： CANON KABUSHIKI KAISHA
发明人： Honma, Hideo , Ishikawa, Hisashi , Miyake, Nobutaka , Nagashima, Yoshitake , Saito, Takashi
IPC分类号： G06F15/64 , H04N7/133
CPC分类号： H04N19/436 , H04N19/124 , H04N19/126 , H04N19/13 , H04N19/146 , H04N19/15 , H04N19/152 , H04N19/164 , H04N19/176 , H04N19/192 , H04N19/196 , H04N19/197 , H04N19/60 , H04N19/91
摘要： This disclosure relates to an apparatus and method for orthogonally transforming and quantizing, in block units, inputted image data, and subsequently performing image compression by variable-length coding the data. In particular, control is performed in such a manner that the compressed information quantity attains a predetermined quantity when variable-length coding is carried out. Optimum image compression and expansion are performed by scanning data quantized upon taking into consideration the output characteristics of an image output unit and human visual characteristics. Further, by selecting an optimum quantization table in coding or selecting optimum results from a plurality of coded results, management of the image memory is facilitated, and image compression and expansion featuring ease of image editing and treatment can be performed while image quality is maintained. Furthermore, control is executed in such a manner that data access to the image memory attains a predetermined value so as to make possible the combining of images in the image memory.
摘要翻译：本公开涉及用于以块为单位对输入的图像数据进行正交变换和量化并随后通过对数据进行可变长度编码来执行图像压缩的设备和方法。特别是，当执行可变长度编码时，以压缩信息量达到预定量的方式进行控制。考虑到图像输出单元的输出特性和人类视觉特性，通过对量化的扫描数据进行最佳图像压缩和扩展。另外，通过在编码选择最佳的量化表或来自多个标记的结果的选择最佳结果，图像存储器的管理变得容易，并且可以在图像质量被保持来进行图像的压缩和膨胀设有便于图像编辑和处理的。此外，以这样的方式执行控制，即对图像存储器的数据访问达到预定值，从而使图像存储器中的图像组合成为可能。

2. 发明授权

EP0469835B1 Image processing apparatus and method 失效
公开(公告)号：EP0469835B1
公开(公告)日：1998-09-30
申请号：EP91306942.3
申请日：1991-07-29
申请人： CANON KABUSHIKI KAISHA
发明人： Honma, Hideo , Ishikawa, Hisashi , Miyake, Nobutaka , Nagashima, Yoshitake , Saito, Takashi
IPC分类号： G06T9/00 , H04N7/30 , H04N1/415
CPC分类号： H04N19/436 , H04N19/124 , H04N19/126 , H04N19/13 , H04N19/146 , H04N19/15 , H04N19/152 , H04N19/164 , H04N19/176 , H04N19/192 , H04N19/196 , H04N19/197 , H04N19/60 , H04N19/91

3. 发明公开

EP0469835A2 Image processing apparatus and method 失效
标题翻译： Verfahren undGerätzur Bildverarbeitung。
公开(公告)号：EP0469835A2
公开(公告)日：1992-02-05
申请号：EP91306942.3
申请日：1991-07-29
申请人： CANON KABUSHIKI KAISHA
发明人： Honma, Hideo , Ishikawa, Hisashi , Miyake, Nobutaka , Nagashima, Yoshitake , Saito, Takashi
IPC分类号： G06F15/64 , H04N7/133
CPC分类号： H04N19/436 , H04N19/124 , H04N19/126 , H04N19/13 , H04N19/146 , H04N19/15 , H04N19/152 , H04N19/164 , H04N19/176 , H04N19/192 , H04N19/196 , H04N19/197 , H04N19/60 , H04N19/91
摘要： This disclosure relates to an apparatus and method for orthogonally transforming and quantizing, in block units, inputted image data, and subsequently performing image compression by variable-length coding the data. In particular, control is performed in such a manner that the compressed information quantity attains a predetermined quantity when variable-length coding is carried out. Optimum image compression and expansion are performed by scanning data quantized upon taking into consideration the output characteristics of an image output unit and human visual characteristics. Further, by selecting an optimum quantization table in coding or selecting optimum results from a plurality of coded results, management of the image memory is facilitated, and image compression and expansion featuring ease of image editing and treatment can be performed while image quality is maintained. Furthermore, control is executed in such a manner that data access to the image memory attains a predetermined value so as to make possible the combining of images in the image memory.
摘要翻译：本公开涉及以块为单位对输入的图像数据进行正交变换和量化的装置和方法，并且随后通过对数据进行可变长度编码来执行图像压缩。具体而言，在进行可变长度编码时，以压缩信息量达到规定量的方式进行控制。考虑到图像输出单元的输出特性和人类视觉特性，通过扫描量化的数据来执行最佳图像压缩和扩展。此外，通过从多个编码结果中选择最佳量化表或选择最佳结果，便于图像存储器的管理，并且可以在保持图像质量的同时执行图像编辑和处理容易的图像压缩和扩展。此外，以这样的方式执行控制，使得对图像存储器的数据访问达到预定值，使得可以在图像存储器中组合图像。

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