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公开(公告)号：US6038341A
公开(公告)日：2000-03-14
申请号：US34857
申请日：1998-03-04
CPC分类号： H04N5/20
摘要： A histogram operating unit comprises: histogram generator which receives input video signals, and creates a histogram of input video signals, a first limiter for receiving a histogram generated by the histogram generator and an externally set first limit level, and restricting the frequency of the histogram created by the histogram generator to within a specified level, and outputting a restricted histogram, a first totaling circuit for calculating the number of samples of video signals produced by the first limiter, second totaling circuit for calculating the number of samples of the input video signals, a first subtractor for subtracting the output of the first totaling circuit from the output of the second totaling circuit, and a corrected histogram generator which receives the output of the first limiter and the output of the first subtractor, and creates the corrected histogram.
摘要翻译： 直方图操作单元包括：直方图生成器，其接收输入视频信号，并创建输入视频信号的直方图;第一限幅器，用于接收由直方图发生器产生的直方图和外部设定的第一极限电平，并限制直方图的频率 由直方图生成器创建到规定级别，并且输出受限直方图;第一合计电路，用于计算由第一限幅器产生的视频信号的采样数;第二合计电路，用于计算输入视频信号的样本数; 第一减法器，用于从第二合计电路的输出中减去第一合计电路的输出;以及校正直方图发生器，其接收第一限幅器的输出和第一减法器的输出，并产生校正后的直方图。
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2.发明授权Pure red color detection circuit and color compensation circuit using the same 失效纯红色检测电路和色彩补偿电路采用相同
公开(公告)号：US6064447A
公开(公告)日：2000-05-16
申请号：US35684
申请日：1998-03-05
CPC分类号： H04N9/68
摘要： Red color saturation is increased and red color with higher purity can be reproduced by composing: a red color detection circuit 1 for detecting a red color signal having higher purity by inputting color differential signals (R-Y) and (B-Y) modulated by color subcarrier, subtracting the absolute value of the (B-Y) signal from the positive polarity component of the (R-Y) signal and removing the negative part of the subtracted signal; Y signal compensation block including: first gain controller 50b for controlling the output signal amplitude of red color detection circuit 1 and a subtracter 50a for subtracting the output signal of first gain controller 50b from a luminance signal Y; an (R-Y) signal compensation block including: second gain controller 51b for controlling the output signal amplitude of red color detection circuit 1 and an adder 51a for adding the output signal of second gain controller 51b and the input (R-Y) signal; and a (B-Y) signal compensation block including: third gain controller 52b for controlling the output signal amplitude of red color detection circuit 1, a polarity inverter 52c for inverting the output signal polarity of third gain controller 52b, a switch circuit 52d for selecting either input signal or output signal of polarity inverter 52c, a polarity discriminater 52e for discriminating the polarity of the input (B-Y) signal and controlling switch circuit 52d and an adder 52e for adding the output signal of switch circuit 52d and the input (B-Y) signal.
摘要翻译： 增加红色饱和度，通过构成红色检测电路1，红色检测电路1，通过输入由彩色副载波调制的色差信号（RY）和（BY）来检测具有较高纯度的红色信号，减去红色， 来自（RY）信号的正极性分量的（BY）信号的绝对值，并去除相减信号的负部分; Y信号补偿块包括：用于控制红色检测电路1的输出信号幅度的第一增益控制器50b和用于从亮度信号Y减去第一增益控制器50b的输出信号的减法器50a; （R-Y）信号补偿块，包括：用于控制红色检测电路1的输出信号幅度的第二增益控制器51b和用于将第二增益控制器51b的输出信号和输入（R-Y）信号相加的加法器51a; 和（BY）信号补偿块，包括：用于控制红色检测电路1的输出信号幅度的第三增益控制器52b，用于反转第三增益控制器52b的输出信号极性的极性反相器52c， 极性反相器52c的输入信号或输出信号，用于识别输入（BY）信号的极性和控制开关电路52d的极性鉴别器52e和用于将开关电路52d的输出信号和输入（BY）信号相加的加法器52e 。
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公开(公告)号：US06252983B1
公开(公告)日：2001-06-26
申请号：US09034984
申请日：1998-03-04
IPC分类号： G06K900
摘要： A histogram generator creates a histogram to detect the characteristics of video signals. The histogram generator allows for a reduction in problems of instability caused by noise that may exist in other histogram generators. A width is allocated to thresholds used in creating the histogram, and signal values are counted after weighting those falling near a threshold.
摘要翻译： 直方图生成器创建一个直方图来检测视频信号的特性。 直方图发生器允许减少由其他直方图发生器中可能存在的噪声引起的不稳定性问题。 将宽度分配给用于创建直方图的阈值，并且对加在阈值附近的信号进行加权后对信号值进行计数。
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4.再颁专利Pure red color detection circuit and color compensation circuit using the same 有权纯红色检测电路和色彩补偿电路使用相同公开(公告)号：USRE38413E1
公开(公告)日：2004-02-03
申请号：US09727884
申请日：2000-12-01
IPC分类号： H04N964
CPC分类号： H04N9/68
摘要： Red color saturation is increased and red color with higher purity can be reproduced by composing: a red color detection circuit 1 for detecting a red color signal having higher purity by inputting color differential signals (R-Y) and (B-Y) modulated by color subcarrier, subtracting the absolute value of the (B-Y) signal from the positive polarity component of the (R-Y) signal and removing the negative part of the subtracted signal; Y signal compensation block including: first gain controller 50b for controlling the output signal amplitude of red color detection circuit 1 and a subtracter 50a for subtracting the output signal of first gain controller 50b from a luminance signal Y; an (R-Y) signal compensation block including: second gain controller 51b for controlling the output signal amplitude of red color detection circuit 1 and an adder 51a for adding the output signal of second gain controller 51b and the input (R-Y) signal; and a (B-Y) signal compensation block including: third gain controller 52b for controlling the output signal amplitude of red color detection circuit 1, a polarity inverter 52c for inverting the output signal polarity of third gain controller 52b, a switch circuit 52d for selecting either input signal or output signal of polarity inverter 52c, a polarity discriminator 52e for discriminating the polarity of the input (B-Y) signal and controlling switch circuit 52d and an adder 52e for adding the output signal of switch circuit 52d and the input (B-Y) signal.
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公开(公告)号：US06373533B1
公开(公告)日：2002-04-16
申请号：US09034851
申请日：1998-03-04
IPC分类号： H04N514
CPC分类号： G06T5/009 , G06T5/40 , G06T2207/10016 , G06T2207/20012 , G06T2207/30201 , H04N5/20
摘要： The tone of video signals is corrected without degrading the tone of certain image features, such as a human face. A gain controller operates and outputs an adjustment value using a histogram output produced by a histogram generator. An average value of picture levels on a screen is detected by an average picture level detector. A histogram correction circuit calculates a look-up table, and a video signal correction circuit corrects the tone of the video signals using the look-up table.
摘要翻译： 纠正视频信号的音调，而不会降低某些图像特征（例如人脸）的色调。 增益控制器使用由直方图发生器产生的直方图输出来操作并输出调整值。 屏幕上的图像电平的平均值由平均图像电平检测器检测。 直方图校正电路计算查找表，并且视频信号校正电路使用查找表校正视频信号的音调。
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公开(公告)号：US06215529B1
公开(公告)日：2001-04-10
申请号：US09035695
申请日：1998-03-05
IPC分类号： H04N5202
摘要： Aiming to improve color reproducibility of a red part having high color saturation, a gamma compensation apparatus of the present invention is composed of a bending point setting block 100a and a gamma compensation block 101a and bending point setting block 100a is composed of a high APL detection circuit 1a inputting an average picture level of an input luminance signal and for detecting and taking out a signal component higher than a designated level; a gain controller 2a for gain controlling the detected signal at the high APL picture detection circuit; and an adder 3a for adding a designated offset to the output of gain controller 2a, and gamma compensation block 101a is composed of a slice circuit 4a inputting a color difference signal (R-Y) and the output of bending point setting block 100a and taking out a color difference signal component higher than the output signal level of bending point setting block 100a; a gain controller 5a for adjusting the output level of slice circuit 4a; and a subtracter 6a for subtracting the output of gain controller 5a from the input color difference signal (R-Y) and outputting a gamma compensated color difference signal (R-Y)′.
摘要翻译： 为了提高具有高色饱和度的红色部分的色彩再现性，本发明的伽马补偿装置由弯曲点设定块100a和伽马补偿块101a构成，弯曲点设定块100a由高APL检测 电路1a输入输入亮度信号的平均图像电平，并且用于检测和取出高于指定电平的信号分量; 增益控制器2a，用于对高APL画面检测电路的检测信号进行增益控制; 以及加法器3a，用于将指定的偏移量与增益控制器2a的输出相加，伽马补偿块101a由输入色差信号（RY）的切片电路4a和弯曲点设定块100a的输出构成， 色差信号分量高于弯曲点设定块100a的输出信号电平; 用于调节切片电路4a的输出电平的增益控制器5a; 以及用于从输入色差信号（R-Y）中减去增益控制器5a的输出并输出伽马补偿色差信号（R-Y）'的减法器6a。
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公开(公告)号：US07209182B2
公开(公告)日：2007-04-24
申请号：US10616990
申请日：2003-07-11
IPC分类号： H04N5/57
CPC分类号： H04N5/142 , H04N5/208 , H04N5/21 , H04N5/44 , H04N21/4318
摘要： A false contour correcting apparatus is capable of removing a false contour in an image based on a digital image signal while avoiding such a side effect caused by false contour correction where noises negatively effecting the display occur on a screen. Therefore, in the false contour correcting apparatus according, a double bit change detection circuit detects as a double bit change a signal value change which is twice a minimum quantization unit in a digital image signal, and outputs a double bit change detection signal representing the position of the double bit change. A signal correction circuit corrects the double bit change in the digital image signal into two one-bit changes on the basis of the double bit change detection signal. Consequently, a false contour corresponding to a portion where the double bit change exists is removed.
摘要翻译： 假轮廓校正装置能够基于数字图像信号去除图像中的假轮廓，同时避免由于其中在屏幕上发生负面影响的噪声而导致的错误轮廓校正引起的这种副作用。 因此，在根据双位变化检测电路的双位改变检测电路中，将数字图像信号中的最小量化单位的两倍的信号值变化检测为双位变化检测电路，并输出表示位置的双位变化检测信号 的双位变化。 信号校正电路基于双位变化检测信号将数字图像信号中的双位变化校正为两个1位变化。 因此，与存在双位变化的部分对应的假轮廓被去除。
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公开(公告)号：US06661469B1
公开(公告)日：2003-12-09
申请号：US09581644
申请日：2000-06-15
IPC分类号： H04N557
CPC分类号： H04N5/142 , H04N5/208 , H04N5/21 , H04N5/44 , H04N21/4318
摘要： A false contour correcting apparatus is capable of removing a false contour in an image based on a digital image signal while avoiding such a side effect caused by false contour correction where noises negatively effecting the display occur on a screen. Therefore, in the false contour correcting apparatus according, a double bit change detection circuit detects as a double bit change a signal value change which is twice a minimum quantization unit in a digital image signal, and outputs a double bit change detection signal representing the position of the double bit change. A signal correction circuit corrects the double bit change in the digital image signal into two one-bit changes on the basis of the double bit change detection signal. Consequently, a false contour corresponding to a portion where the double bit change exists is removed.
摘要翻译： 假轮廓校正装置能够基于数字图像信号去除图像中的假轮廓，同时避免由于其中在屏幕上发生负面影响的噪声而导致的错误轮廓校正引起的这种副作用。 因此，在根据双位变化检测电路的双位改变检测电路中，将数字图像信号中的最小量化单位的两倍的信号值变化检测为双位变化检测电路，并输出表示位置的双位变化检测信号 的双位变化。 信号校正电路基于双位变化检测信号将数字图像信号中的双位变化校正为两个1位变化。 因此，与存在双位变化的部分对应的假轮廓被去除。
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公开(公告)号：US06295095B1
公开(公告)日：2001-09-25
申请号：US09359597
申请日：1999-07-23
申请人： Minoru Kawabata , Atsuhisa Kageyama
发明人： Minoru Kawabata , Atsuhisa Kageyama
IPC分类号： H04N514
CPC分类号： H04N5/57 , H04N5/44 , H04N21/4318
摘要： In a video signal character converting device, a sampling window signal generator generates a signal for sampling an input video signal “a”. A video scene amplitude discrimination circuit samples the video signal in response to the sampling signal, detects a change in image level either field by field or frame by frame based on an integrated value for every duration of vertical scanning, and outputs a resetting pulse when the change in picture level exceeds a predetermined level. A video scene periodicity discrimination circuit measures a time interval between two successive resetting pulses, and outputs a control signal if the time interval is shorter than a predetermined period. A video scene conversion circuit converts a video scene in response to the control signal. The video signal character detecting device of the present invention determines as to whether or not the input video signal has video images that present an adverse effect mentally and physically to viewers, by observing an image level and periodicity of the video signal in this manner. The device is thus able to output video images by converting them into a harmless level with a process of reducing contrast or blanking, if it determines the video images harmful.
摘要翻译： 在视频信号字符转换装置中，采样窗口信号发生器产生用于对输入视频信号“a”进行采样的信号。 视频场景振幅鉴别电路响应于采样信号对视频信号进行采样，根据垂直扫描的每个持续时间的积分值逐场或逐帧地检测图像电平的变化，并且当 图像水平的变化超过预定水平。 视频场景周期性判别电路测量两个连续复位脉冲之间的时间间隔，并且如果时间间隔短于预定周期，则输出控制信号。 视频场景转换电路响应于控制信号转换视频场景。 本发明的视频信号字符检测装置通过以这种方式观察视频信号的图像级和周期性来确定输入视频信号是否具有对观看者的精神和物理上的不良影响的视频图像。 因此，如果确定视频图像有害，则该设备能够通过将它们转换成无害水平，并通过减少对比度或消隐的过程来输出视频图像。
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公开(公告)号：US5748257A
公开(公告)日：1998-05-05
申请号：US852670
申请日：1997-05-07
申请人： Minoru Kawabata , Atsuhisa Kageyama
发明人： Minoru Kawabata , Atsuhisa Kageyama
CPC分类号： H04N7/0122 , H04N5/20
摘要： A picture information detecting apparatus includes a picture area signal output circuit to detect a picture area excluding black band portions from the input video signal to produce a picture area signal to designate the picture area from which picture information is detected. Also included is a picture information detecting circuit for detecting picture information from the input video signal in the designated area. A picture quality compensating circuit is also provided for compensating the video input signal using the detected picture information to produce the gradation compensated video signal. An EDTV 2 discriminating circuit may also be included to determine if the video input signal is an EDTV 2 signal.
摘要翻译： 图像信息检测装置包括图像区域信号输出电路，用于从输入视频信号中检测除黑带部分之外的图像区域，以产生图像区域信号，以指定检测图像信息的图像区域。 还包括用于从指定区域中的输入视频信号中检测图像信息的图像信息检测电路。 还提供了图像质量补偿电路，用于使用检测到的图像信息补偿视频输入信号，以产生灰度补偿视频信号。 还可以包括EDTV 2识别电路以确定视频输入信号是否是EDTV 2信号。
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