| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Real time programmable chroma keying with shadow generation | US09495540 | 2000-02-01 | US07006155B1 | 2006-02-28 | Vinay Agarwala; Clement Tse |
| A system for forming composite video images from one or more foreground images and one or more background images. In one embodiment, s sum of a suppressed foreground image signal with weight α, with one or more selected foreground colors suppressed, and a background image signal with weight 1−α′ (0≦α′≦1) is formed, where a and α′ may vary from pixel to pixel and with time. In another embodiment, a shadow from a selected foreground image is impressed on selected pixels of a background image. In another embodiment, foreground suppression and shadowing are combined, optionally by retrofitting, using an existing α-mixer or a newly constructed α-mixer. Provision of a chroma key map allows a foreground image shadow to be prescribed pixel by pixel, including a transition region in which the shadowed image slowly disappears. | ||||||
| 22 | Method of chroma-keying for a digital video compression system | US992291 | 1997-12-17 | US6084982A | 2000-07-04 | Kiran Challapali; Yingwei Chen |
| A method of performing chroma-key coding including the steps of defining color regions and quantifying the number of pixels in the regions, classifying macroblocks in accordance with the number of pixels thus quantified, assigning chroma complexity weights for use in the computation of quantization step-size based on the classification of the macroblocks, computing the quantization step-size, performing quantization and performing variable length coding. | ||||||
| 23 | Chroma keyer with correction for background defects | US196737 | 1994-02-15 | US5400081A | 1995-03-21 | Daniel J. Chaplin |
| A chroma keyer with correction for background defects generates a control signal that does not include variations associated with the background defects. The chroma magnitude of a reference signal that represents a chroma key set with a color background scene without a foreground object is used as a divisor for a hue select signal generated by a hue selector from a chrominance component of an input signal that represents the chroma key set with the foreground object to produce a chroma key control signal. The chroma key control signal is combined with the reference signal to produce a control signal for background suppression. The chroma key control signal also is input to a key circuit to produce a key signal for shaping a new background scene. The reference signal also may be combined with a uniform color signal from a reference matte generator to produce an error signal that is combined with the chroma key control signal to produce the control signal for correction of the background defects in the input signal. | ||||||
| 24 | Chroma keyer with fringe control offset | US80162 | 1993-06-21 | US5313304A | 1994-05-17 | Daniel J. Chaplin |
| A chroma keyer with fringe control offset adds a fringe control offset value to a correlation output produced by a hue selector. The hue selector compares the hues of a foreground image, representing a foreground object in front of a reference matte background, with a reference hue corresponding to the reference matte background to produce the correlation output. The adjusted correlation signal is then negatively clipped and provided at the output of the hue selector as a hue select signal that is used for deriving a chroma key signal and for providing background suppression to the foreground image. | ||||||
| 25 | Chroma keyer with secondary hue selector | US880861 | 1992-05-11 | US5251016A | 1993-10-05 | James A. Delwiche |
| An improved chroma keyer has a secondary hue selector for chrominance suppression of "blue fringing" effects. The second hue selector provides a second chroma key signal from a foreground video signal, with the selected hue being offset from that of a primary hue selector. A matte generator having a hue corresponding to the hue of a backing in the foreground video signal is modulated as a function of the second chroma signal. The modulated hue from the matte generator is subtracted from the foreground video signal to produce a modified foreground video signal. The modified foreground video signal is converted into a shaped foreground video signal. The shaped foreground video signal is combined with a shaped background video signal to produce a composited output video signal. The shaped background video signal is a function of a background video signal and a primary chroma key signal from the primary hue selector. | ||||||
| 26 | Chroma-keyed specular texture mapping in a graphics processor | US932402 | 1997-09-17 | US6054993A | 2000-04-25 | Goran Devic; Christopher Shaw |
| A graphics system includes a graphics controller for rendering polygons with specular highlighting (glare) based on a comparison of texel color values from a texture map to a range of color values. The graphics processor includes range registers for storing the range of color values and color comparators for comparing a texel color value to the range of colors stored in the range registers. The range of color values used in the comparison corresponds to the range of colors of those portions of a texture for which specular highlighting is appropriate, such as metallic surfaces off which light reflects. If a texel color value to be applied to a screen pixel is within the range of colors defined for specular highlighting, the graphics processor adds an appropriate specular component to the texel value. | ||||||
| 27 | Modified chroma keyed technique for simple shape coding for digital video | US156790 | 1998-09-17 | US6122014A | 2000-09-19 | Krit Panusopone; Xuemin Chen |
| An efficient chroma key-based coding technique for digital video with an optimized switching threshold. An optimized binary keying threshold is provided for switching between a first image region (such as a background region) and second image region (such as a foreground object) video picture. The threshold optimizes a PSNR of a quantization error Q of a key color K. A chroma key technique is also provided for representing the shape of a video object, where the shape information (alpha plane) of a foreground object is embedded in the keyed output, so there is no need to carry an explicit alpha plane, or use alpha plane coding. The chroma key shape representation technique provides a smooth transition at the boundary between objects without the need for special switching patterns, such as a general gray scale shape coding tool, or post-processing, e.g., using feathering filters. | ||||||
| 28 | 用于在数据处理系统中处理帧的方法和装置 | CN201510867983.3 | 2015-12-01 | CN105657295A | 2016-06-08 | M·博古茨; P·赫罗博克; D·摩多尔兹克 |
| 用于在数据处理系统中处理帧的方法和装置。本发明提供了一种在色度键控配置中提供要与背景帧合成的前景帧的装置，该前景帧和该背景帧均包括一起形成各自帧的一个或更多个区域。检测模块(700)确定各帧区域是否具有预定颜色值，并基于该确定生成并存储色度键控信息。控制电路(710)随后根据所存储的色度键控信息控制要对所述区域执行的图像处理。 | ||||||
| 29 | 对数字视频进行基于色度键编码的方法和设备 | CN99810987.8 | 1999-08-23 | CN1120630C | 2003-09-03 | 克里特·帕努索芬; 陈学敏 |
| 使用最佳转换门限值、用于数字视频的基于色度键的有效的编码技术。提供最佳二进制键控门限值用于在第一个图像区域和第二个图像区域(如前景目标)之间转换视频图形。该门限值使基色K的量化误差Q的PSNR最佳化。还提供色度键控技术用于表示视频目标的形状，这里前景目标的形状信息被嵌入在键控输出中，所以不需要传送显式α平面或使用α平面编码。色度键形状表示技术提供了目标之间边界上的平滑转换而不需要特别的转换模式。 | ||||||
| 30 | 视频信号处理电路 | CN91102894.3 | 1991-04-29 | CN1029903C | 1995-09-27 | 威廉·A·拉戈尼 |
| 本装置包括复合亮度信号源；耦合至亮度信号源并响应后沿键控脉冲以使复合亮度信号后沿时段箝位在预定直流电压电平上的键控箝位及信号限幅装置；用以使彩色副载波解调而产生多个色差信号的色度信号处理装置；在同步信号时段期间重复该脉冲的键控脉冲源；及多个键控箝位装置，每一装置响应于同步信号时段键控脉冲，并各自分别响应解调后的色差信号及图象代表亮度信号而使第一色差及图象代表亮度信号箝位在公共电压基准电平上。 | ||||||
| 31 | 视频信号处理电路 | CN91102894.3 | 1991-04-29 | CN1056202A | 1991-11-13 | 威廉·A·拉戈尼 |
| 本装置包括复合亮度信号源；耦合至亮度信号源并响应后沿键控脉冲以使复合亮度信号后沿时段箝位在预定直流电压电平上的键控箝位及信号限幅装置；用以使彩色副载波解调而产生多个色差信号的色度信号处理装置；在同步信号时段期间重复该脉冲的键控脉冲源；及多个键控箝位装置，每一装置响应于同步信号时段键控脉冲，并各自分别响应解调后的色差信号及图象代表亮度信号而使每一色差及图象代表亮度信号箝位在公共电压基准电平上。 | ||||||
| 32 | 多模态前景背景分割 | CN201480021522.8 | 2014-04-14 | CN105229697B | 2019-01-22 | A·科列特; 罗梅亚; B·张; A·G·柯克 |
| 本公开涉及被配置成允许不同背景前景分割模态对分割作出贡献的框架。一方面，基于RGB背景分离、色度键控、IR背景分离、当前深度相对于背景深度以及当前深度相对于阈值背景深度模态来处理各个像素。每一模态可作为因子进行贡献，该框架将因子进行组合以确定关于一像素是前景还是背景的概率。各个概率被馈送入全局分割框架以获得经分割的图像。 | ||||||
| 33 | 多模态前景背景分割 | CN201480021522.8 | 2014-04-14 | CN105229697A | 2016-01-06 | A·科列特罗梅亚; B·张; A·G·柯克 |
| 本公开涉及被配置成允许不同背景前景分割模态对分割作出贡献的框架。一方面，基于RGB背景分离、色度键控、IR背景分离、当前深度相对于背景深度以及当前深度相对于阈值背景深度模态来处理各个像素。每一模态可作为因子进行贡献，该框架将因子进行组合以确定关于一像素是前景还是背景的概率。各个概率被馈送入全局分割框架以获得经分割的图像。 | ||||||
| 34 | 电视接收机 | CN94101766.4 | 1994-01-11 | CN1095203A | 1994-11-16 | 海崎一洋; 上村雅子; 的野孝明; 窪田定雄 |
| 一种电视接收机具有存储器，操纵遥控信号接收器或键控开关依靠微机控制视频色度处理电路的方法可以按照不同的显示形式在纵横比为16∶9的屏幕上显示图像。第一存储器为每种显示形式存储视频控制数据，第二存储器为指定确定的视频控制数据存储指定数据。当操作遥控信号接收器或键控开关改变显示形式时，微机根据第二存储器的指定数据从第一存储器中读取对应于新设定的显示形式的视频控制数据。 | ||||||
| 35 | 基于多级调制的高速率OOFDM信号发射系统和方法 | CN201510975440.3 | 2015-12-23 | CN105610754A | 2016-05-25 | 刘皎; 何建强; 张林 |
| 本发明公开了一种基于多级调制的高速率OOFDM信号发射系统和方法，首先，利用各个子载波间的相互正交性进一步提高了频谱利用率，并且提高了系统的抗窄带干扰和抗多径衰落能力，其次，OFMD的子载波数目灵活可调，每个子载波对应的调制格式也可灵活选择，可以对子载波进行差分相移键控、正交差分相移键控以及更为复杂的正交幅度调制等多种调制技术，最后，结合光纤通信系统中光载波的特点之一，即光载波具有不同的偏振态，在不同偏振态上加载信息，实现偏振复用，与现有技术相比，本发明具有很高的频谱利用率、很强的色度色散和偏振模色散容忍能力的优点，是一种非常有发展潜力的高速长距离光纤通信技术，具有推广应用的价值。 | ||||||
| 36 | 적응 크로마키 영상 합성 장치 및 방법 | KR1020120024379 | 2012-03-09 | KR101212026B1 | 2012-12-13 | 이현주 |
| PURPOSE: An apparatus and a method for adaptively compositing an image using chroma keying are provided to reduce errors in a chroma region by controlling color change when the color of an input image is changed. CONSTITUTION: An adaptive chroma-key image synthesis apparatus calculates a color distance between a chromaticity coordinate value of a test area and a chromaticity coordinate value of a preceding chroma key. If the color distance is smaller than a threshold value, the apparatus sets the chromaticity coordinate value of the preceding chroma key as the chromaticity coordinate value of a current chroma key. The apparatus decides a chroma area in an input image. The apparatus replaces the chroma area with a background image. | ||||||
| 37 | 방송 개선 시스템 및 방법 | KR1020017010685 | 2000-12-11 | KR1020010103022A | 2001-11-17 | 우드,칼,제이. |
| 본발명은적어도하나의신호가크로마키를위해준비되는, 수신된개선신호를사용하여수신된텔레비전방송신호를개선하는방송개선시스템및 방법에관한것이다. 신호가텔레비전에전달하기전에텔레비전방송신호를인터셉트하고, 중첩신호가텔레비전에통과하기전에텔레비전방송신호에개선신호를중첩시키기위해크로마키(chroma keying)를적용하도록시스템이구성된다. | ||||||
| 38 | 데이터 처리 시스템에서 프레임을 처리하는 방법 및 장치 | KR1020150166124 | 2015-11-26 | KR1020160066502A | 2016-06-10 | 보구스미첼; 크로박피오트; 모드르작다미안 |
| 크로마키잉방식에있어서배경프레임과합성될전경프레임을제공하는장치로서, 상기전경프레임과상기배경프레임의각각은각각의프레임을함께형성하는한 개이상의영역들을구비한다. 검출모듈(700)은각 프레임영역이미리결정된컬러값을갖는지여부를판정하고, 상기판정에근거해서크로마키잉정보를생성해서저장한다. 그다음제어회로(710)는상기저장된크로마키잉정보에따라상기영역에대해서행해지는화상처리를제어한다. | ||||||
| 39 | 적응형 크로마키 합성 장치 및 그 방법 | KR1020060018771 | 2006-02-27 | KR100661528B1 | 2006-12-27 | 금동교; 정연기; 안낙호 |
| An adaptive chroma key synthesis apparatus and a method therefor are provided to be actively applied to various image conditions and enhance the quality of a chroma key. An image input unit(61) receives an image picked up through a camera and a 'background screen replacement image'. A pre-processing unit(62) scans an input image, spatially divides the entire picture per every frame, generates a separate chroma key for the respective divided pictures, tracks the change of the chroma key, and generates a chroma key. A chroma keying processing unit(63) performs a chroma keying process on the basis of the chroma key, replaces pixels corresponding to a background screen chroma key in the input image including an object with the 'background screen replacement image', and synthesizes the 'background screen replacement image'. An image output unit outputs the synthesized object and a 'background screen replacement image'. | ||||||
| 40 | A METHOD AND APPARATUS FOR PERFORMING CHROMA KEY, TRANSPARENCY AND FOG OPERATIONS | PCT/US1998/001955 | 1998-01-28 | WO98036379A2 | 1998-08-20 | |
| A method and apparatus for chroma keying filtered textures are provided. Chroma keying is performed which replaces the input texel color with a new color if the input texel color matches the chroma color. The chroma key circuitry keeps the input texel color and sets the alpha component to 1 if the input texel color does not match the chroma color. The chroma keyed texels are filtered using bilinear filtering. The color components of the filtered texels are fogged using a fog factor, a fog color, and the alpha component of the filtered texel. The fogged and filtered signal is blended with a background color to produce an output color for the texels. | ||||||
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