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公开(公告)号：US5808697A
公开(公告)日：1998-09-15
申请号：US663659
申请日：1996-06-14
申请人： Naohiro Fujimura , Hitoshi Hasegawa , Takuji Kurashita , Hiroshi Onishi , Masayuki Tsuji , Yuuji Yamamoto , Shinji Takeuchi
发明人： Naohiro Fujimura , Hitoshi Hasegawa , Takuji Kurashita , Hiroshi Onishi , Masayuki Tsuji , Yuuji Yamamoto , Shinji Takeuchi
CPC分类号： H04N5/57 , G09G2320/066 , G09G2320/0673 , G09G2360/16
摘要： A video contrast enhancer enhances luminance contrast by dividing each video frame or field into blocks, calculating a mean luminance level for each block, selecting mapping functions on the basis of these mean luminance levels over a series of frames or fields, and mapping the video luminance levels according to the selected mapping functions. Color-saturation contrast is enhanced by modifying the amplitude of the modulated chrominance signal by the histogram equalization method, preferably by making a single linear modification in each period of the chrominance signal, so that color phase is not affected. For video signals with non-picture bands, these enhancements are preferably restricted to the picture area. If a black offset is present, it is preferably removed.
摘要翻译： 视频对比度增强器通过将每个视频帧或场划分为块来增强亮度对比度，计算每个块的平均亮度水平，基于这些平均亮度级别在一系列帧或场上选择映射函数，以及映射视频亮度 根据所选择的映射函数。 通过直方图均衡方法修改调制色度信号的幅度，优选地通过在色度信号的每个周期中进行单次线性修改来增强色饱和度的对比度，使得色相不受影响。 对于具有非图像频带的视频信号，这些增强优选地限于图像区域。 如果存在黑色偏移，则优选地被去除。
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2.发明授权Chrominance-luminance separation method and filter performing selective spatial filter based on detected spatial correlation 失效色度 - 亮度分离方法和滤波器基于检测到的空间相关性执行选择性空间滤波
公开(公告)号：US5502509A
公开(公告)日：1996-03-26
申请号：US263198
申请日：1994-06-21
申请人： Takuji Kurashita , Noriyuki Yamaguchi , Mitsuru Ishizuka , Junko Kijima , Hitoshi Hasegawa , Masaharu Yao
发明人： Takuji Kurashita , Noriyuki Yamaguchi , Mitsuru Ishizuka , Junko Kijima , Hitoshi Hasegawa , Masaharu Yao
IPC分类号： H04N9/78
CPC分类号： H04N9/78
摘要： Motion-adaptive chrominance-luminance separation of a composite video signal is accomplished by comb-filtering the video signal on the time axis, bandpass-filtering the video signal on at least one spatial axis selected according to spatial correlation detected in the video signal, and combining the two filtered results in proportion to motion detected in the video signal. Motion is detected in part by obtaining a one-frame difference signal that has been filtered to eliminate chrominance information; here too the filtering is performed on at least one spatial axis selected according to spatial correlation. Selecting the spatial filtering axes according to spatial correlation enables chrominance and luminance to be separated effectively without unnecessary information loss.
摘要翻译： 复合视频信号的运动自适应色度 - 亮度分离是通过对时间轴上的视频信号进行梳状滤波来对在视频信号中检测到的空间相关性所选择的至少一个空间轴上的视频信号进行带通滤波来实现的，以及 将两个滤波结果与视频信号中检测到的运动成比例地组合。 通过获得已被滤波以消除色度信息的一帧差分信号，部分地检测运动; 这里也根据空间相关性选择的至少一个空间轴进行滤波。 根据空间相关性选择空间滤波轴可以实现色度和亮度的有效分离，无需不必要的信息丢失。
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公开(公告)号：US06590601B2
公开(公告)日：2003-07-08
申请号：US09788451
申请日：2001-02-21
IPC分类号： H04N714
摘要： A videophone takes a live picture of the user, sends the live picture during part of a call, generates a processed picture different from the live picture, and sends the processed picture during another part of the call. The processed picture may be prepared in advance, or may be generated by combining the live picture with a prepared picture. Alternatively, the processed picture may be obtained by increasing a quantization coefficient of the live picture, producing a mosaic effect that disguises the live picture. The processed picture can be sent to protect the privacy of the videophone user, or to provide appropriate transition at the beginning or end of the call. The processed picture can also be sent when the call is placed on hold.
摘要翻译： 视频电话拍摄用户的实时图像，在呼叫的一部分期间发送实况图像，生成与实况图片不同的处理图像，并且在呼叫的另一部分期间发送处理的图像。 经处理的图像可以预先准备，或者可以通过将实时图像与准备的图像组合来生成。 或者，可以通过增加实时图像的量化系数来获得处理后的图像，从而产生掩盖实时图像的马赛克效果。 可以发送处理的图像以保护视频电话用户的隐私，或者在呼叫的开始或结束时提供适当的转换。 当呼叫置于保持状态时，也可以发送处理后的图像。
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4.发明授权
公开(公告)号：US5500686A
公开(公告)日：1996-03-19
申请号：US255797
申请日：1994-06-07
CPC分类号： H04N9/78
摘要： A filter for motion adaptive Y/C separation, which is capable of obtaining image of high resolution and little picture quality degradation in the case where an image is switched from static one to motion one or vice-versa, is provided with a filter for extracting Y signal outputting Y signal and a filter for extracting C signal outputting C signal, by detecting whether image is motion one or static one by a motion detecting unit, and when motion image is detected, by detecting partially interframe correlation or correlation in three fields, and according to the detection result, by adaptively switching a plurality of processings for extracting intraframe Y signal and a plurality of processings for extracting intraframe C signal.
摘要翻译： 一种用于运动自适应Y / C分离的滤波器，其提供了一种用于提取的滤波器，该滤波器能够在图像从静态切换到运动自适应Y / C分离的情况下获得高分辨率和小图像质量劣化的图像 Y信号输出Y信号和滤波器，用于提取C信号输出C信号，通过检测图像是运动检测单元是运动图像还是静态图像，并且当检测到运动图像时，通过检测三个场中的部分帧间相关性或相关性， 并且根据检测结果，通过自适应地切换用于提取帧内Y信号的多个处理和用于提取帧内C信号的多个处理。
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公开(公告)号：US5541669A
公开(公告)日：1996-07-30
申请号：US387632
申请日：1995-02-13
IPC分类号： H04N9/78
CPC分类号： H04N9/78
摘要： A filter is used for separating luminance and color signals from a composite color television signal in which the frequency of the color signal is multiplexed over the high-frequency region of the luminance signal. When a picture is detected with respect to its motion under frame correlation and if that motion is relatively small, the separation of luminance and color signals is performed based on the interframe correlation. If the motion is relatively large, the separation of luminance and color signals is made based on the interfield correlation. The luminance and color signal separation based on the interfield correlation is attained from a correlation with signals in a field spaced forwardly away from the subject field by one field. This is accomplished by selecting a calculation having the highest correlation in calculations for an objective sample point and a plurality of sample points located about the objective sample point. Such a correlation is determined by checking the correlation of image signals in the set of sample points which are spaced apart from one another by one frame and located around the objective sample point.
摘要翻译： 滤波器用于从彩色信号的频率在亮度信号的高频区域上复用的复合彩色电视信号中分离亮度和颜色信号。 当相对于帧相关下的运动检测到图像时，如果该运动相对较小，则基于帧间相关性执行亮度和颜色信号的分离。 如果运动相对较大，则基于场间相关性来进行亮度和色彩信号的分离。 基于场间相关性的亮度和颜色信号分离是从与目标场间隔开一个场的场中的信号的相关性获得的。 这通过选择在客观采样点的计算中具有最高相关性的计算和围绕客观采样点定位的多个采样点来实现。 这样的相关性通过检查彼此间隔开一帧并且位于物镜采样点周围的采样点集合中的图像信号的相关性来确定。
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6.发明授权Luminance and chrominance signals separating filter adaptive to movement of image 失效亮度和色度信号分离过滤器适应图像的运动
公开(公告)号：US5585861A
公开(公告)日：1996-12-17
申请号：US344640
申请日：1994-11-09
CPC分类号： H04N9/78
摘要： A luminance (Y) and chrominance (C) signals separating filter includes a motion detecting circuit which partially detects a movement of an image utilizing a correlation between frames; an inter-frame YC separating circuit which performs a separation utilizing the inter-frame correlation when the motion detecting circuit detects a still image, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; an intra-frame YC separating circuit which partially detects a correlation between fields or between frames and a correlation in a field when the motion detecting circuit detects a moving image, performs a separation utilizing the correlations, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; a C signal mixing circuit which mixes the inter-frame YC separated C signals and the intra-frame YC separated C signals in accordance with an output of the motion detecting circuit and outputs motion adaptive YC separated C signals; and a Y signal mixing circuit which mixes the inter-frame YC separated Y signals and the intra-frame YC separated Y signals in accordance with the output of the motion detecting circuit and outputs motion adaptive YC separated Y signals.
摘要翻译： 亮度（Y）和色度（C）信号分离滤波器包括运动检测电路，其利用帧之间的相关性部分地检测图像的移动; 帧间YC分离电路，当运动检测电路检测到静止图像时，利用帧间相关性进行分离，并输出帧内YC分离的C信号和帧内YC分离的Y信号; 帧内YC分离电路，当运动检测电路检测到运动图像时，部分地检测场之间或帧之间的相关性以及场中的相关性，利用相关性进行分离，并输出帧内YC分离的C信号和 帧内YC分离Y信号; C信号混合电路，其根据运动检测电路的输出混合帧间YC分离C信号和帧内YC分离C信号，并输出运动自适应YC分离C信号; Y信号混合电路根据运动检测电路的输出混合帧间YC分离的Y信号和帧内YC分离的Y信号，并输出运动自适应YC分离的Y信号。
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7.发明授权Luminance and chrominance signals separating filter adaptive to movement of image 失效亮度和色度信号分离过滤器适应图像的运动
公开(公告)号：US5412434A
公开(公告)日：1995-05-02
申请号：US850488
申请日：1992-03-12
CPC分类号： H04N9/78
摘要： A luminance (Y) and chrominance (C) signals separating filter includes a movement detecting circuit which partially detects a movement of an image utilizing a correlation between frames; an inter-frame YC separating circuit which performs a separation utilizing the inter-frame correlation when the movement detecting circuit detects a still image, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; an intra-frame YC separating circuit which partially detects a correlation between fields or between frames and a correlation in a field when the movement detecting circuit detects a moving image, performs a separation utilizing the correlations, and outputs intra-frame YC separated C signals and intra-frame YC separated Y signals; a C signal mixing circuit which mixes the inter-frame YC separated C signals and the intra-frame YC separated C signals in accordance with an output of the movement detecting circuit and outputs movement adaptive YC separated C signals; and a Y signal mixing circuit which mixes the inter-frame YC separated Y signals and the intra-frame YC separated Y signals in accordance with the output of the movement detecting circuit and outputs movement adaptive YC separated Y signals.
摘要翻译： 亮度（Y）和色度（C）信号分离滤波器包括移动检测电路，其利用帧之间的相关性部分地检测图像的移动; 帧间YC分离电路，当移动检测电路检测到静止图像时，利用帧间相关性进行分离，并输出帧内YC分离的C信号和帧内YC分离的Y信号; 帧内YC分离电路，当运动检测电路检测到运动图像时，部分地检测场之间或帧之间的相关性以及场中的相关性，利用相关性进行分离，并输出帧内YC分离的C信号和 帧内YC分离Y信号; C信号混合电路，根据移动检测电路的输出混合帧间YC分离C信号和帧内YC分离C信号，并输出移动自适应YC分离C信号; Y信号混合电路根据移动检测电路的输出混合帧间YC分离的Y信号和帧内YC分离的Y信号，输出运动自适应YC分离的Y信号。
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公开(公告)号：US06989825B2
公开(公告)日：2006-01-24
申请号：US09851348
申请日：2001-05-09
IPC分类号： G09G5/00
CPC分类号： G09G5/006 , G09G3/3611 , G09G2310/04
摘要： In order to reduce the power consumed by the circuit when the image data is transferred to a memory in a display means, a write region detecting means 8 is provided to detect the address region in the graphics memory 2 accessed for writing by the image data writing means 1, and only such data that is within the region including the addresses accessed by the writing means 1 is transferred to the memory 5 in the display means 4. The region including the accessed addresses may for example a rectangular region of from the minimum vertical direction address to the maximum vertical direction address Y among the accessed addresses, and from the minimum horizontal direction address to the maximum horizontal direction address among the accessed addresses.
摘要翻译： 为了在图像数据被传送到显示装置中的存储器时减少由电路消耗的功率，提供写入区域检测装置8以检测通过图像数据写入进行写入访问的图形存储器2中的地址区域 装置1，并且仅包括由写入装置1访问的地址的区域内的这种数据被传送到显示装置4中的存储器5.包括被访问地址的区域可以例如是从最小垂直方向 访问地址中的最大垂直方向地址Y，以及访问地址中的最小水平方向地址到最大水平方向地址。
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公开(公告)号：US5475445A
公开(公告)日：1995-12-12
申请号：US279894
申请日：1994-07-25
IPC分类号： H04N9/78
CPC分类号： H04N9/78
摘要： A filter is used for separating luminance and color signals from a composite color television signal in which the frequency of the color signal is multiplexed over the high-frequency region of the luminance signal. When a picture is detected with respect to its motion under frame correlation, and if that motion is relatively small, the separation of luminance and color signals is performed based on interframe correlation. If the motion is relatively large, the separation of luminance and color signals is made based on interfield correlation. The luminance and color signal separation based on the interfield correlation is attained from a correlation with signals in fields spaced forwardly and rearwardly away from the subject field by one field. This is accomplished by selecting a calculation having the highest among a plurality of calculations for an objective sample point and a plurality of sample points located about the objective sample point. Such a correlation is determined by checking the correlation of image signals in the set of sample points which are spaced apart from one another by one frame and located around the objective sample point.
摘要翻译： 滤波器用于从彩色信号的频率在亮度信号的高频区域上复用的复合彩色电视信号中分离亮度和颜色信号。 当检测到相对于其在帧相关下的运动的图像时，如果该运动相对较小，则基于帧间相关性执行亮度和颜色信号的分离。 如果运动相对较大，则基于场间相关性来进行亮度和色彩信号的分离。 基于场间相关性的亮度和颜色信号分离是从与被摄体场向前和向后隔开一个场的场中的信号的相关性获得的。 这是通过在客观采样点的多个计算中选择具有最高的计算和围绕客观采样点定位的多个采样点来实现的。 这样的相关性通过检查彼此间隔开一帧并且位于物镜采样点周围的采样点集合中的图像信号的相关性来确定。
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