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1. 发明授权

US06633343B2 Dynamic gamma correction apparatus 失效
标题翻译：动态伽马校正装置
公开(公告)号：US06633343B2
公开(公告)日：2003-10-14
申请号：US09803660
申请日：2001-03-12
申请人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
发明人： Keiichi Ito , Atsuhisa Kageyama , Nobutaka Okada , Katsuya Ishikawa , Hidetoshi Suzuki , Hisao Kunitani , Yuki Kakuya
IPC分类号： H04N5202
CPC分类号： H04N5/202
摘要： An appropriate correction quantity is obtained for a video luminance signal on an individual video basis with a characteristic value, like the maximum or average value, of the luminance signal taken into account, thereby performing gray scale correction more effectively. A dynamic gamma correction apparatus for performing a correction on a video luminance signal includes: a correction start point control section for obtaining a correction start point, which is a lower limit of a given correction range, in accordance with a characteristic value of the luminance signal; a gamma correction quantity calculating section for obtaining a provisional correction quantity for the luminance signal to be corrected using the correction start point and the luminance signal; a gamma correction gain control section for obtaining a gain for the provisional correction quantity in accordance with the characteristic value of the luminance signal; a multiplier for obtaining a product of the provisional correction quantity and the gain as a gamma correction quantity; and an adder for obtaining a sum of the luminance signal and the gamma correction quantity and outputting the sum. The correction start point and the gain for the provisional correction quantity are controllable in accordance with the characteristic value of the luminance signal. Thus, an appropriate gamma correction quantity can be obtained as a final correction quantity.
摘要翻译：通过考虑到亮度信号的特性值（如最大值或平均值），在单个视频基础上获得适当的校正量，从而更有效地执行灰度校正。用于对视频亮度信号执行校正的动态伽马校正装置包括：校正开始点控制部分，用于根据亮度信号的特征值获得作为给定校正范围的下限的校正开始点 ; 伽马校正量计算部分，用于使用校正开始点和亮度信号获得要校正的亮度信号的临时校正量; 伽马校正增益控制部分，用于根据亮度信号的特征值获得临时校正量的增益; 用于获得临时校正量和增益的乘积作为伽马校正量的乘法器; 以及用于获得亮度信号和伽马校正量之和并输出该和的加法器。校正开始点和临时校正量的增益根据亮度信号的特征值是可控的。因此，可以获得适当的伽马校正量作为最终校正量

2. 发明授权

US06967692B1 Apparatus for processing luminance signal 失效
标题翻译：用于处理亮度信号的装置
公开(公告)号：US06967692B1
公开(公告)日：2005-11-22
申请号：US10130624
申请日：2000-11-24
申请人： Yuki Kakuya , Atsuhisa Kageyama , Nobutaka Okada , Keiichi Ito
发明人： Yuki Kakuya , Atsuhisa Kageyama , Nobutaka Okada , Keiichi Ito
IPC分类号： G09G5/10 , H04N5/20 , H04N5/46 , H04N5/57 , H04N9/77 , H04N5/14 , H04N9/64
CPC分类号： G09G5/10 , H04N5/20 , H04N5/46 , H04N5/57 , H04N21/44008
摘要： A luminance signal processing apparatus that detects an average luminance level, adaptively to various video signal formats. This luminance signal processing apparatus includes a window pulse generation unit 101 for generating a window pulse signal S110 that indicates a period during which a luminance signal of an input video signal is sampled; a luminance value addition unit 102 for obtaining a total sum of luminance values of the luminance signal in the period indicated by the window pulse signal S110; a number-of-pixel addition unit 103 for obtaining the number of pixels in the period indicated by the window pulse signal S110; a bit shift unit 104 for bit-shifting an output signal of the luminance value addition unit 102 and an output signal of the number-of-pixel addition unit 103, respectively; and a division unit 105 for dividing the bit-shifted output signal of the luminance value addition unit 102 by the bit-shifted output signal of the number-of-pixel addition unit 103, thereby obtaining an average luminance level.
摘要翻译：一种自适应地检测各种视频信号格式的平均亮度级的亮度信号处理装置。该亮度信号处理装置包括窗口脉冲产生单元101，用于产生指示输入视频信号的亮度信号被采样的周期的窗口脉冲信号S110; 亮度值相加单元102，用于获得由窗口脉冲信号S110指示的时段中的亮度信号的亮度值的总和; 用于获得由窗口脉冲信号S110指示的周期中的像素数量的像素数加法单元103; 位移单元104，用于分别对亮度值相加单元102的输出信号和像素数加法单元103的输出信号进行位移位; 以及分割单元105，用于将亮度值相加单元102的位移输出信号除以像素数加法单元103的位移输出信号，从而获得平均亮度级。

3. 发明授权

US07113227B1 Gradation correcting apparatus gradation correcting method and video display apparatus 有权
标题翻译：梯度校正装置灰度校正方法和视频显示装置
公开(公告)号：US07113227B1
公开(公告)日：2006-09-26
申请号：US10129541
申请日：2000-11-24
申请人： Yuki Kakuya , Atsuhisa Kageyama , Katsuya Ishikawa , Hidetoshi Suzuki
发明人： Yuki Kakuya , Atsuhisa Kageyama , Katsuya Ishikawa , Hidetoshi Suzuki
IPC分类号： H04N5/14 , H04N5/20 , H04N5/52 , H04N9/64 , H04N9/69 , H04N9/77 , G06K9/00 , G03F3/08
CPC分类号： H04N5/20 , G09G5/10
摘要： The present invention has an object to provide a gradation correcting apparatus for correcting the gradation of the white side of a video luminance signal.The gradation correcting apparatus is provided with a maximum value detector 101 for detecting a maximum value of a luminance signal S101, a white comparator 102 for comparing the luminance signal S101, a maximum luminance value S111 detected by the maximum value detector 101, and a first white threshold value S103, a white linear converter 103 for performing linear conversion on the luminance signal S101 on the basis of the maximum luminance value S111, the first white threshold value S103, and a second white threshold value S104, and a white controller 104 for correcting the luminance signal S101 on the basis of the result of the comparison in the white comparator 102, the output of the white linear converter 103, and the second white threshold value S104.
摘要翻译：本发明的目的是提供一种用于校正视频亮度信号的白色侧的灰度的灰度校正装置。灰度校正装置设置有用于检测亮度信号S 101的最大值的最大值检测器101，用于比较亮度信号S 101的白色比较器102，由最大值检测器101检测的最大亮度值S111，和第一白色阈值S103，用于基于最大亮度值S 111，第一白色阈值S 103和第二白色阈值S，对亮度信号S 101进行线性转换的白色线性转换器103 以及白色控制器104，用于根据白色比较器102中的比较结果，白色线性转换器103的输出和第二白色阈值S 104来校正亮度信号S 101。

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