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公开(公告)号：US6043853A
公开(公告)日：2000-03-28
申请号：US838316
申请日：1997-04-08
CPC分类号： H04N5/208
摘要： Video camera which emphasizes an outline of a video signal produced thereby. A detail signal of a video image represented by the video signal is generated and which represents a vertical outline emphasis signal. Edges of the video image and burst-like portions of the video signal are detected, and an edge detection signal is generated that corresponds in one manner to the detected edges and that corresponds in another manner to the detected burst portions. The detail signal is adjusted by the edge detection signal or by a cross color suppression signal generated from the vertical outline emphasis signal. The video signal then is modified by the adjusted detail signal so as to produce the outline emphasized video signal. The detail signal may also be adjusted by a gain setting signal that corresponds to the vertical outline emphasis signal and which is compressed in level when the vertical outline emphasis signal is relatively low.
摘要翻译： 视频摄像机，其强调由此产生的视频信号的轮廓。 产生由视频信号表示的视频图像的细节信号，其表示垂直轮廓加重信号。 检测视频信号的视频图像和脉冲串部分的边缘，并且生成与检测到的边缘相对应的边缘检测信号，并且以与检测到的突发部分相对应的边缘检测信号。 细节信号由边缘检测信号或由垂直轮廓强调信号产生的交叉色抑制信号进行调整。 然后，通过调整的细节信号修改视频信号，以产生轮廓强调的视频信号。 细节信号也可以通过对应于垂直轮廓加重信号的增益设置信号来调节，并且当垂直轮廓加重信号相对较低时被加压。
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公开(公告)号：US5959694A
公开(公告)日：1999-09-28
申请号：US49809
申请日：1998-03-27
申请人： Keiichi Ito , Hitoshi Nakamura
发明人： Keiichi Ito , Hitoshi Nakamura
摘要： An apparatus for processing a video signal by adjusting the contour of a picture. The apparatus includes an arrangement from a delay circuit 2 to a subtraction circuit 5 for extracting a contour of the picture and generating at least a signal opposite in polarity to a contour enhancement signal enhancing the extracted contour. The signal polarity is continuously varied from a maximum value of a positive polarity to a maximum value of an opposite polarity by a variable resistor RV2, an output of which is added to the input video signal by an addition circuit 6. With the processing apparatus, a picture can not only be raised in resolution as felt by the viewer, that is can be enhanced in contour, but also can be lowered in resolution as felt by the user, that is can be softened in contour. A corresponding method for processing a video signal by adjusting the contour of a picture and a video camera having the apparatus for processing the video signal in this manner are also disclosed.
摘要翻译： 一种用于通过调整图像的轮廓来处理视频信号的装置。 该装置包括从延迟电路2到减法电路5的装置，用于提取图像的轮廓，并且至少产生与增强提取的轮廓的轮廓增强信号极性相反的信号。 信号极性通过可变电阻器RV2从正极性的最大值到相反极性的最大值连续变化，可变电阻器RV2的输出由加法电路6加到输入视频信号上。利用处理装置， 图像不仅可以以观众感觉到的分辨率提高，即可以在轮廓上增强，而且可以降低用户感觉到的分辨率，即可以在轮廓上软化。 还公开了通过以这种方式调整具有用于处理视频信号的装置的图像轮廓和具有视频信号的摄像机来处理视频信号的相应方法。
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公开(公告)号：US5936681A
公开(公告)日：1999-08-10
申请号：US812485
申请日：1997-03-06
CPC分类号： H04N5/208
摘要： A video display monitor employs interpolation which maintains sharpness in images which have large differences in signal levels of picture elements and assuring smoothness of images such as lamps which have small differences in signal levels. The difference in the signal level differences of respective adjacent picture elements is detected by delay and subtraction. A decoder produces a signal for interpolation based on the input of an interpolation coefficient and the absolute value of the interpolation coefficient which is output from an absolute value detector.
摘要翻译： 视频显示监视器采用内插，其保持图像信号水平差异大的图像的清晰度，并确保诸如信号电平差异小的诸如灯之类的图像的平滑度。 通过延迟和减法来检测各个相邻像素的信号电平差的差异。 解码器基于内插系数的输入和从绝对值检测器输出的内插系数的绝对值产生用于内插的信号。
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74.发明授权Image processing system that includes discrimination of an interpolation direction 失效图像处理系统，包括对插值方向的区分
公开(公告)号：US5920654A
公开(公告)日：1999-07-06
申请号：US574572
申请日：1995-12-14
申请人： Jun Someya , Kazuhiro Chiba , Kazuyoshi Watabu , Yoshie Yamamoto , Mamoru Inamura , Takeshi Nagayama , Noriko Bamba , Noboru Sunada
发明人： Jun Someya , Kazuhiro Chiba , Kazuyoshi Watabu , Yoshie Yamamoto , Mamoru Inamura , Takeshi Nagayama , Noriko Bamba , Noboru Sunada
IPC分类号： G06T3/40 , G06T5/00 , G06T5/20 , H04N1/409 , H04N5/208 , H04N5/21 , H04N5/367 , H04N9/04 , G06K9/36
CPC分类号： G06T3/4007 , G06T5/004 , G06T5/20 , H04N1/409 , H04N5/208 , H04N5/21 , H04N5/367 , H04N9/045 , H04N2209/041 , H04N2209/046 , H04N9/88
摘要： In an image processing system, an outline correction of image data and a smoothing for noise removal are performed. Generally, the outline correction is performed by emphasizing a high frequency component, and the smoothing is performed by removing the high frequency component. Within one image data, by properly switching the emphasizing and the removal of the high frequency component, while the outline correction is carried out, the noise removal can be performed. An absolute value of a high frequency component Fa extracted from the image data Pi by a first differential filter is compared with a discrimination threshold value K, and depending on the comparison result, either Fa or -Fa as the correction data Fo is selected by a selector and is added to the image data Pi. As a result, when Fo=Fa, the high frequency component is emphasized, and when Fo=-Fa, smoothing is performed. A pixel interpolation and a multi picture formation are also disclosed.
摘要翻译： 在图像处理系统中，执行图像数据的轮廓校正和噪声去除的平滑处理。 通常，通过强调高频分量来执行轮廓校正，并且通过去除高频分量来执行平滑。 在一个图像数据内，通过适当地切换高频分量的强调和去除，在执行轮廓校正的同时，可以执行噪声去除。 将通过第一差分滤波器从图像数据Pi提取的高频分量Fa的绝对值与鉴别阈值K进行比较，并且根据比较结果，作为校正数据Fo的Fa或-Fa被选择为 选择器，并被添加到图像数据Pi。 结果，当Fo = Fa时，强调高频分量，并且当Fo = -Fa时，进行平滑处理。 还公开了像素内插和多图像形成。
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公开(公告)号：US5905820A
公开(公告)日：1999-05-18
申请号：US809984
申请日：1991-12-18
CPC分类号： G06T5/009 , G06T3/4023 , G06T7/0081 , G06T2207/20148
摘要： A method and apparatus for enhancing an image for a display, first digitizes the image to produce a map of the image, this map containing pixels having 2.sup.n grey levels where n is the number of bits per pixel. The map of the image is then downsampled to produce a downsampled map of the image. Thresholding is then performed on the downsampled map of the image to reduce the number of bits per pixel from n bits to m bits to produce a thresholded downsampled map of the image, where m is less than n. The number of bits per pixel is restored from m bits to p bits, where p is greater than m, to produce a restored thresholded downsampled map of the image. The restored thresholded downsampled map of the image can be downsampled again to produce an image map suitable for display on a low to moderate cost display, such as a CRT, with grey scale capability. The displayed image has an enhanced appearance, since it is high fidelity with respect to the original.
摘要翻译： 一种用于增强显示图像的方法和装置，首先数字化图像以产生图像的地图，该地图包含具有2n个灰度级的像素，其中n是每像素的位数。 然后对图像的地图进行下采样以产生图像的下采样图。 然后对图像的下采样图进行阈值处理，以将每像素的位数从n位减少到m位，以产生图像的阈值下采样图，其中m小于n。 每像素的位数从m位恢复到p位，其中p大于m，以产生图像的恢复的阈值下采样图。 图像的恢复阈值下采样图可以被再次下采样，以产生适合于在具有灰度级能力的低成本显示器（例如CRT）上显示的图像映射。 显示的图像具有增强的外观，因为它相对于原稿具有高保真度。
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公开(公告)号：US5898464A
公开(公告)日：1999-04-27
申请号：US870448
申请日：1997-06-06
申请人： Hyun-Deok Cho
发明人： Hyun-Deok Cho
CPC分类号： H04N5/208
摘要： A method which can be used to enhance an outline of an image displayed in an image display apparatus such as a television receiver, and a circuit performing the method. The circuit includes a peaking signal generation circuit which generates a first peaking signal and a second peaking signal corresponding to an amplitude transition of a video signal. A first peaked video signal generation circuit generates a first peaked video signal by adding the first peaking signal to the video signal. A control signal generation circuit generates a first control signal based on a result of comparing a first-order differential signal developed by differentiating the video signal with a reference signal, and a second control signal by delaying the first control signal for the predetermined period. A first selection circuit selects either the video signal or the first peaked videos signal according to the first control signal. A second peaked video signal generation circuit generates a second peaked video signal by adding the second peaking signal to the first selected signal. And, a second selection circuit selects either the first selected signal or the second peaked signal to develop a second selected signal, and outputs the second selected signal as an enhanced video signal. Therefore, the circuit can enhance an outline of an image formed by a video signal without modifying an amplitude transition time of the video signal and introducing the preshoot and overshoot into the video signal.
摘要翻译： 可以用于增强显示在诸如电视接收机的图像显示装置中的图像的轮廓的方法，以及执行该方法的电路。 该电路包括产生与视频信号的幅度转变相对应的第一峰化信号和第二峰化信号的峰化信号产生电路。 第一峰值视频信号产生电路通过将第一峰值信号加到视频信号来产生第一峰值视频信号。 控制信号生成电路基于将通过对视频信号进行微分而产生的一阶差分信号与参考信号进行比较的结果生成第一控制信号，以及通过在预定时间段内延迟第一控制信号来产生第二控制信号。 第一选择电路根据第一控制信号选择视频信号或第一峰值视频信号。 第二峰值视频信号产生电路通过将第二峰值信号加到第一选定信号来产生第二峰值视频信号。 并且，第二选择电路选择第一选择信号或第二峰值信号以产生第二选定信号，并输出第二选定信号作为增强视频信号。 因此，电路可以增强由视频信号形成的图像的轮廓，而不改变视频信号的幅度转换时间，并将预拍和过冲引入视频信号。
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公开(公告)号：US5828415A
公开(公告)日：1998-10-27
申请号：US738826
申请日：1996-10-28
CPC分类号： H04N7/01 , H04N5/208 , H04N7/0102 , H04N7/0125 , H04N5/202 , H04N5/46 , H04N9/64
摘要： Video down-conversion apparatus in which an input, higher definition video signal is converted to an output, lower definition video signal having a smaller number of active lines and/or a smaller number of active pixels per line than the input video signal, comprises: an interpolator for receiving pixels of the input video signal at an input pixel rate and interpolating output data values at the input pixel rate, the output data values comprising active output pixel values interspersed with dummy pixel values; control logic for generating an active enable signal associated with the output data values generated by the interpolator, the active enable signal having a first state when an active output pixel value is generated and a second state when a dummy pixel value is generated; a signal processing device connected to receive the output data values generated by the interpolator, the signal processing device comprising an input latch operable to latch an output data value from the interpolator only when the active enable signal is in the first state; and a buffer memory for buffering data output by the signal processing device, for output at a pixel rate associated with the output, lower definition video signal.
摘要翻译： 视频下变频装置，其中输入的较高清晰度视频信号被转换为输出，具有比输入视频信号更少的有效行数和/或每行的较少数目的有效像素的较低清晰度视频信号包括： 用于以输入像素速率接收输入视频信号的像素并以输入像素速率内插输出数据值的内插器，所述输出数据值包括散布有虚拟像素值的有源输出像素值; 用于产生与由所述内插器产生的输出数据值相关联的有效使能信号的控制逻辑，所述有效使能信号在产生有效输出像素值时具有第一状态，并且当产生虚拟像素值时具有第二状态; 所述信号处理装置被连接以接收由所述内插器产生的输出数据值，所述信号处理装置包括输入锁存器，所述输入锁存器可操作以仅在所述有效使能信号处于所述第一状态时从所述内插器锁存输出数据值; 以及缓冲存储器，用于缓冲由信号处理装置输出的数据，以与输出的较低清晰度视频信号相关联的像素速率输出。
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公开(公告)号：US5822467A
公开(公告)日：1998-10-13
申请号：US773428
申请日：1996-12-27
申请人： Patricia D. Lopez , Hal Hansen , Jeffrey P. Lee
发明人： Patricia D. Lopez , Hal Hansen , Jeffrey P. Lee
CPC分类号： H04N1/4092
摘要： A method of filtering images with a filter that is dependent on image type. For binary images, a fixed Laplacian filter is used for all pixels. For non-binary images, an automatic level-sensitive Laplacian filter is used. For non-binary images, Laplacian filter coefficients and normalization divisors are made a function of intensity on a pixel by pixel basis. Pixels indicating a high intensity may be greatly changed by neighboring pixels. Pixels indicating a low intensity receive relatively little or no filtering. In a specific example embodiment, the intensity range is divided to bands, with a different filter for each band. The resulting images are visually sharpened (edge enhanced) with very little impact in darker areas of the image.
摘要翻译： 使用依赖于图像类型的过滤器过滤图像的方法。 对于二进制图像，固定的拉普拉斯滤波器用于所有像素。 对于非二进制图像，使用自动电平敏感的拉普拉斯滤波器。 对于非二进制图像，将拉普拉斯滤波器系数和归一化因数作为逐个像素的强度函数。 指示高强度的像素可能被相邻像素极大地改变。 指示低强度的像素接收相对较少或不进行滤波。 在具体的示例性实施例中，强度范围被划分为带，每个频带具有不同的滤波器。 所得到的图像在图像的较暗区域中以非常小的影响被视觉上锐化（边缘增强）。
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公开(公告)号：US5767900A
公开(公告)日：1998-06-16
申请号：US577139
申请日：1995-12-22
申请人： Ichiro Tanji , Taku Kihara
发明人： Ichiro Tanji , Taku Kihara
摘要： Digital processing apparatus for correcting an image enhancement signal having a shape includes a peak detector for detecting and holding peak levels of the image enhancement signal and an adjustment circuit, responsive to the peak levels, for correcting the image enhancement signal to reduce its peak levels while substantially maintaining its shape and to limit the signal levels of the image enhancement signal to a range of levels substantially between a first predetermined peak limit and a second predetermined peak limit.
摘要翻译： 用于校正具有形状的图像增强信号的数字处理装置包括用于检测并保持图像增强信号的峰值电平的峰值检测器和响应于峰值电平的调整电路，用于校正图像增强信号以降低其峰值电平，同时 基本上保持其形状并且将图像增强信号的信号电平限制在基本上在第一预定峰值极限和第二预定峰值极限之间的水平范围。
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公开(公告)号：US5748258A
公开(公告)日：1998-05-05
申请号：US575389
申请日：1995-12-20
申请人： Ichiro Tanji
发明人： Ichiro Tanji
CPC分类号： H04N5/208
摘要： Video signal processing apparatus and method which generates an aperture correction signal, or detail signal, which has a narrow width even for video signals that have low high frequency components. The processing apparatus generates a standard detail signal from the video signal, detects the maximum amplitude level of plural samples of the detail signal, and modifies the amplitude level of one of those samples as a function of the ratio of the sample's amplitude level to the detected maximum amplitude level. The apparatus further properly modifies the detail signal even when the positive and negative maximum amplitudes of the video signal are substantially different.
摘要翻译： 产生孔径校正信号或细节信号的视频信号处理装置和方法，即使对于具有低频率分量的视频信号也具有窄的宽度。 处理装置从视频信号生成标准细节信号，检测细节信号的多个样本的最大幅度电平，并且将这些样本中的一个样本的振幅电平作为样本的振幅电平与检测到的幅度电平的比的函数进行修改 最大振幅电平。 即使当视频信号的正和负最大幅度基本上不同时，该装置还可以适当地修改细节信号。
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