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1. 发明授权

US06774943B1 Method and apparatus for edge enhancement in digital images 有权
标题翻译：数字图像边缘增强的方法和装置
公开(公告)号：US06774943B1
公开(公告)日：2004-08-10
申请号：US09386256
申请日：1999-08-31
申请人： Sophia Wei-Chun Kao , Der-Ren Chu , Ren-Yuh Wang
发明人： Sophia Wei-Chun Kao , Der-Ren Chu , Ren-Yuh Wang
IPC分类号： H04N5208
CPC分类号： H04N9/045 , H04N5/208 , H04N9/646 , H04N11/20
摘要： An apparatus for edge enhancement of a digital image provided as raw digital image data to an input terminal and for providing processed image data to an output terminal. An offset processing circuit is coupled to the input terminal and configured to receive the raw data and generate offset data. An interpolation circuit is coupled to the offset processing circuit and configured to receive the offset data and to provide interpolated data. A color processing circuit is coupled to the interpolation circuit and configured to process the interpolated data to generate color data. An edge enhancement circuit is coupled to the interpolation circuit and the color processing circuit and configured to enhance the edges of the image based on the interpolated data and the color data to generate enhanced data. A lookup table is coupled to the color processing circuit and the edge enhancement circuit and configured to lookup the color data and the enhanced data to generate lookup data. A conversion circuit is coupled to the lookup table circuit and configured to convert the lookup data to generate the processed image data to the output terminal. In one aspect of the invention the processing is performed with RGB data, and in another aspect of the invention the processing is performed with YUV data. In another embodiment of the invention the edge enhancement circuit includes an edge extraction circuit, a cut-off level adjustment circuit and an edge gain scaling circuit. These circuits are used to define the edge of objects in the image and to enhance their respective edges. Advantages of the present invention include correctly locating object edges, and avoiding artifacts when the edges are enhanced. Consequently, the invention provides an improved image edge enhancement technique over conventional edge processors.
摘要翻译：一种用于将作为原始数字图像数据提供给数字图像的边缘增强的装置，用于向输入端子提供处理的图像数据到输出端子。偏移处理电路耦合到输入端并被配置为接收原始数据并产生偏移数据。内插电路耦合到偏移处理电路并且被配置为接收偏移数据并提供内插数据。颜色处理电路耦合到内插电路并且被配置为处理内插数据以生成颜色数据。边缘增强电路耦合到内插电路和颜色处理电路，并且被配置为基于内插数据和颜色数据来增强图像的边缘以生成增强数据。查找表耦合到颜色处理电路和边缘增强电路，并且被配置为查找颜色数据和增强数据以生成查找数据。转换电路耦合到查找表电路并且被配置为转换查找数据以将经处理的图像数据生成到输出终端。在本发明的一个方面，用RGB数据进行处理，在本发明的另一方面，用YUV数据进行处理。在本发明的另一个实施例中，边缘增强电路包括边缘提取电路，截止电平调整电路和边缘增益缩放电路。这些电路用于定义图像中物体的边缘并增强其各自的边缘。本发明的优点包括正确定位物体边缘，并且当边缘增强时避免伪影。因此，本发明提供了相对于常规边缘处理器的改进的图像边缘增强技术。

2. 发明授权

US06353685B1 Method and apparatus for image compression 失效
标题翻译：图像压缩方法和装置
公开(公告)号：US06353685B1
公开(公告)日：2002-03-05
申请号：US09386251
申请日：1999-08-31
申请人： Tony Hung-Yao Wu , Wei-Chun Lee , Chia-Hung Chen , Der-Ren Chu , Sophia Wei-Chun Kao , Kang-Huai Wang , Ren-Yuh Wang
发明人： Tony Hung-Yao Wu , Wei-Chun Lee , Chia-Hung Chen , Der-Ren Chu , Sophia Wei-Chun Kao , Kang-Huai Wang , Ren-Yuh Wang
IPC分类号： G06K946
CPC分类号： G06T9/007
摘要： An image compression apparatus for compressing image data provided to an input terminal and providing compressed data to an output terminal includes a 4×4 weighted digital cosine transformer (DCT) coupled to the input terminal and configured to convert the image data into weighted frequency data. A zigzag circuit is coupled to the DCT and configured to zigzag process the frequency data and generate create zigzag data. A Q-factor estimator is coupled to the DCT and configured to estimate the frequency data and generate a Q-factor. A DC coding circuit is coupled to the zigzag circuit and configured to code the zigzag data and generate a DC code. A quantization circuit is coupled to the zigzag circuit and the Q-factor estimator and configured to quantize the zigzag data based on the Q-factor and generate quantized data. A run-length coding circuit coupled to the DC coding circuit and the quantization circuit and configured to encode the quantized data to create variable length data as the compressed data to the output terminal. In this manner, the original image is compressed. While the invention is described with reference to specific hardware, the invention can also be implemented in software employing the functions as described herein. Advantages of the present invention include an image compression technique that is both fast and efficient. Additionally, the invention provides a fast and efficient image compression technique that can be applied to moving images.
摘要翻译：用于压缩提供给输入端的图像数据并向输出端提供压缩数据的图像压缩装置包括耦合到输入端并被配置为将图像数据转换成加权频率数据的4×4加权数字余弦变换器（DCT）。锯齿形电路耦合到DCT并且被配置为之字形处理频率数据并生成创建曲折数据。 Q因子估计器耦合到DCT并且被配置为估计频率数据并产生Q因子。 DC编码电路耦合到Z字形电路并且被配置为对Z形数据进行编码并生成DC代码。量化电路耦合到Z字形电路和Q因子估计器，并且被配置为基于Q因子量化Z字形数据并产生量化数据。一种游程长度编码电路，其耦合到DC编码电路和量化电路，并且被配置为对量化的数据进行编码，以将可变长度数据作为压缩数据创建到输出端子。以这种方式，原始图像被压缩。尽管参考特定硬件描述了本发明，但是本发明也可以采用如本文所述的功能的软件来实现。本发明的优点包括快速有效的图像压缩技术。此外，本发明提供了可以应用于运动图像的快速且高效的图像压缩技术。

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