公开(公告)号：US20040212739A1

公开(公告)日：2004-10-28

申请号：US10808416

申请日：2004-03-25

发明人： Shinya Kiuchi ,  Jun Ikeda ,  Shuichi Ojima ,  Tsuyoshi Hirashima ,  Ryouta Hata

IPC分类号： H04N005/202

CPC分类号： H04N9/646 ,  H04N5/20

摘要： A characteristic value-calculating unit, calculating a characteristic value based on an input image signal, a conversion characteristic-calculating unit, determining a conversion characteristic from the characteristic value, and a signal-converting unit, converting the input image signals in accordance with the determined conversion characteristic, are provided. The conversion characteristic has a low level region segment, which is close to the origin, a high level region segment, which is close to a full scale point, and a middle level region segment, which is positioned between the low level region and high level region, and the slope in the middle level region is set so as to be larger than both of the slopes of the low level region and the high level region.

摘要翻译： 特征值计算单元，基于输入图像信号计算特征值，转换特性计算单元，根据特征值确定转换特性，以及信号转换单元，根据该特征值转换输入图像信号 确定的转换特性。 转换特性具有接近原点的低电平区域段，接近满刻度点的高电平区域段和位于低电平区域和高电平之间的中间电平区域段 区域，并且中间电平区域中的斜率被设定为大于低电平区域和高电平区域的两个斜率。

公开(公告)号：US20040207759A1

公开(公告)日：2004-10-21

申请号：US10822742

申请日：2004-04-13

发明人： Wei Li ,  Chung-Tao Chu ,  Andy Chao Hung

IPC分类号： H04N005/57 ,  H04N005/202

CPC分类号： H04N5/20

摘要： A method for enhancing video or other multimedia in order to achieve a closer-to-movie theater viewing experience. The enhancement method can be applied to YUV or other video formats which are used for TV or digital media. The method provides a curve with at least one inflection point such that at least one region has a concave upward arc and another region has a concave downward arc. The improved curve provides relatively less contrast in relatively dark regions and relatively more contrast in relatively bright regions. By taking into account the visual sensitivity to various luminance levels, a neutral point is selected to be located at a relatively dark point. To the darker side of the neutral point, luminance is suppressed. To the brighter side of the neutral point, luminance is enhanced. This luminance-mapping curve is applied to the luminance (Y) signal so as to enhance both brightness and contrast.

摘要翻译： 一种用于增强视频或其他多媒体以便实现更接近电影的剧院观看体验的方法。 该增强方法可以应用于用于电视或数字媒体的YUV或其他视频格式。 该方法提供具有至少一个拐点的曲线，使得至少一个区域具有凹入的向上圆弧，而另一区域具有凹入的向下的弧。 改进的曲线在相对较暗的区域中提供相对较小的对比度，并且在相对较亮的区域中提供相对更多的对比 通过考虑对各种亮度水平的视觉灵敏度，选择中性点位于相对较暗的位置。 在中性点的较暗侧，亮度被抑制。 在中性点的较亮侧，亮度提高。 该亮度映射曲线被应用于亮度（Y）信号，以便增强亮度和对比度。

公开(公告)号：US20040135907A1

公开(公告)日：2004-07-15

申请号：US10339283

申请日：2003-01-09

申请人： Lockheed Martin Corporation

发明人： Robert M. Krohn ,  Steven J. Pratt

IPC分类号： H04N005/202

CPC分类号： G06K9/60

摘要： An apparatus processes a video image. The apparatus includes an imaging device, a frame grabber device, and a host computer. The imaging device (20) produces a gray level image representing the video image. The frame grabber device conducts preprocessing functions on the gray level image and produces a plurality of image types from the gray level image. The host computer has a memory for storing the plurality of image types. The plurality of image types are transferred directly from the frame grabber device to the memory of the host computer.

摘要翻译： 设备处理视频图像。 该装置包括成像装置，帧抓取装置和主计算机。 成像装置（20）产生表示视频图像的灰度级图像。 帧抓取装置在灰度图像上进行预处理功能，并从灰度图像生成多个图像类型。 主计算机具有用于存储多个图像类型的存储器。 多个图像类型从帧抓取装置直接传送到主计算机的存储器。

公开(公告)号：US20040021784A1

公开(公告)日：2004-02-05

申请号：US10210437

申请日：2002-08-01

申请人： Eastman Kodak Company

发明人： Michael A. Vaughn

IPC分类号： H04N005/202 ,  H04N009/64

CPC分类号： H04N1/6033 ,  Y10S358/906

摘要： A method of improving a digital image captured by a digital camera comprising: providing a digital camera having a memory for storing known values of a color chart having a plurality of color patches of different colors and a digital image processor, using the digital camera to capture an image of the color chart to produce image values of the color patches of the color chart; operating the digital image processor to process at least some of the color patch imaged values and the stored known values of the color patches to produce a color correction matrix or profile; and storing the color correction matrix or profile to correct color images subsequently acquired by the digital camera.

摘要翻译： 一种改进由数字照相机拍摄的数字图像的方法，包括：提供具有存储器的数字照相机，该存储器用于存储具有多个不同颜色的色块和数字图像处理器的彩色图表的已知值，所述数字照相机使用数字照相机拍摄 彩色图的图像以产生彩色图表的色块的图像值; 操作所述数字图像处理器以处理所述色块成像值中的至少一些以及所述存储的所述色块的已知值以产生颜色校正矩阵或轮廓; 并存储颜色校正矩阵或轮廓以校正随后由数字照相机获取的彩色图像。

公开(公告)号：US20030071923A1

公开(公告)日：2003-04-17

申请号：US09450643

申请日：1999-11-22

发明人： MICHAEL A. ESKIN

IPC分类号： H04N005/202

CPC分类号： H04N9/69 ,  G09G5/06 ,  G09G5/363 ,  G09G2320/0276

摘要： A system and method for performing real-time gamma correction of video in which a pixel having multiple components, e.g., RGB components, can be gamma corrected through a single access to a lookup table.

摘要翻译： 用于执行视频的实时伽马校正的系统和方法，其中具有多个分量的像素（例如RGB分量）可以通过对查找表的单一访问进行伽马校正。

公开(公告)号：US20020063784A1

公开(公告)日：2002-05-30

申请号：US09988758

申请日：2001-11-20

发明人： Hideyuki Kitagawa

IPC分类号： H04N005/202

CPC分类号： H04N9/69 ,  G09G3/3611 ,  G09G5/00 ,  G09G2320/0276 ,  H04N5/202 ,  H04N9/3105 ,  H04N9/3182

摘要： In a digital-signal-processing circuit comprising an LUT memory used for storing a gamma-correction LUT used for carrying out gamma correction on an input digital video signal and a front-stage signal-processing unit provided at a stage preceding the LUT memory and used for carrying signal processing such as contrast adjustment, after the input digital video signal having a typical width of 8 bits is subjected to signal processing such as contrast adjustment in the signal-processing unit to be transformed into a digital video signal with a width of 11 bits, the 11-bit digital video signal is supplied to the LUT memory having an output bit count of 10 bits, which is smaller than the 11-bit width of the digital video signal supplied to the LUT memory but greater than the 8-bit width of the digital video signal input to the signal-processing unit.

摘要翻译： 在数字信号处理电路中，包括用于存储用于对输入数字视频信号执行伽马校正的伽马校正LUT的LUT存储器和在LUT存储器之前的阶段提供的前级信号处理单元， 用于承载诸如对比度调整的信号处理，在具有8比特的典型宽度的输入数字视频信号经受诸如信号处理单元中的对比度调整之类的信号处理以变换成数字视频信号，宽度为 11位，11位数字视频信号被提供给具有10位的输出位数的LUT存储器，该存储器比提供给LUT存储器但大于8位的数字视频信号的11位宽度小， 输入到信号处理单元的数字视频信号的位宽。

公开(公告)号：US20010048476A1

公开(公告)日：2001-12-06

申请号：US09225791

申请日：1999-01-05

发明人： HITOSHI NAKAMURA ,  SEIJI KAWA ,  FUMIHIKO SUDO

IPC分类号： H04N005/228 ,  H04N005/202

CPC分类号： H04N9/69 ,  H04N9/68 ,  H04N9/735

摘要： Of three-color signals Rnull, Gnull and Bnull, obtained as output signals of multipliers 156R, 156G and 156B, designed to effectuate luminance compression of the three-color signals R, G and B sent to input terminals 151R, 151G and 151B by multiplying the signals R, G and B with a coefficient k, in such a manner as to maintain saturation and color hue of the three-color signals R, G and B, only the saturation of color video signals represented by the three-color signals Rnull, Gnull and Bnull is compressed by first saturation compression circuits 160R, 160G and 160B so that the signal level of the signal of the three-color signals Rnull, Gnull and Bnull having the highest signal level will be the clip level. Of the three prime color signals Rnull, Gnull and Bnull obtained as output signals of the first saturation compression circuits 160R, 160G and 160B, only the saturation of the signals Rnull, Gnull and Bnull is compressed, in a state in which the luminance and the color hue of the signals Rnull, Gnull and Bnull are maintained, in order to obtain three prime color signals R*, G* and B* the high luminance portion of which has only saturation changed.

摘要翻译： 获得作为乘法器156R，156G和156B的输出信号的三色信号R'，G'和B'被设计为实现发送到输入端151R，151G的三色信号R，G和B的亮度压缩， 151B通过将信号R，G和B与系数k相乘，以保持三色信号R，G和B的饱和度和色调，只有由三色信号R，G和B表示的彩色视频信号的饱和度， 彩色信号R'，G'和B'由第一饱和压缩电路160R，160G和160B压缩，使得具有最高信号电平的三色信号R'，G'和B'的信号的信号电平将 作为剪辑级别。 在作为第一饱和压缩电路160R，160G和160B的输出信号获得的三个素色信号R“，G”和B“中，只有信号R”，G“和B” 在维持信号R“，G”和B“的亮度和色调的状态下被压缩，以便获得三个素色信号R *，G *和B *，高亮度 其部分仅饱和度改变。

公开(公告)号：US20040189818A1

公开(公告)日：2004-09-30

申请号：US10807479

申请日：2004-03-23

申请人： OLYMPUS OPTICAL CO., LTD.

发明人： Takao Tsuruoka ,  Kazuhito Horiuchi

IPC分类号： H04N005/202 ,  H04N009/68 ,  G06T005/00

CPC分类号： H04N1/6083 ,  H04N1/407 ,  H04N1/4074 ,  H04N1/6027 ,  H04N1/6086 ,  H04N5/23219 ,  H04N5/23245 ,  H04N5/243 ,  H04N5/355 ,  H04N5/35527 ,  H04N9/643

摘要： An image processing apparatus includes a photographing condition estimation unit for estimating a photographing condition of the input image based on photometric information and focal information. A Y/C separation unit separates the input image into a luminance signal and a color difference signal; a luminance correction unit extracts an edge from the luminance signal and corrects the luminance signal by a gradation conversion curve; a color difference correction unit corrects the color difference signal based on luminance signals obtained before and after the gradation correction and a theoretical limit characteristic of color reproduction; a skin color correction unit performs skin color correction depending on the photographing condition; and a Y/C synthesis unit synthesizes the luminance signal and the color difference signal obtained after the correction. Gradation correction is performed on the input image such that appropriate hue and saturation are achieved while emphasizing a main object.

摘要翻译： 一种图像处理设备包括：摄影条件估计单元，用于基于测光信息和焦点信息估计输入图像的拍摄条件。 Y / C分离单元将输入图像分离成亮度信号和色差信号; 亮度校正单元从亮度信号中提取边缘并通过灰度转换曲线校正亮度信号; 色差校正单元基于灰度校正之前和之后获得的亮度信号和色彩再现的理论极限特性校正色差信号; 皮肤颜色校正单元根据拍摄条件执行肤色校正; 并且Y / C合成单元合成在校正后获得的亮度信号和色差信号。 在输入图像上执行灰度校正，使得在强调主要对象的同时实现适当的色调和饱和度。

公开(公告)号：US20040041928A1

公开(公告)日：2004-03-04

申请号：US10462797

申请日：2003-06-17

发明人： Hiroto Hirakoso ,  Haruhisa Itakura

IPC分类号： H04N005/202

CPC分类号： H04N5/2355 ,  H04N5/20 ,  H04N5/2352

摘要： A detecting section for detecting a high-luminance object signal is provided. By using resulting detection data, an exposure control is performed so that the white levels of high-luminance objects do not become unduly high. Low-luminance objects are blacked under such imaging conditions. A gamma correction circuit is provided that can make the low-luminance objects appear good by compensating for the blackening. A control of changing the characteristic of the gamma connection circuit in real time in accordance with the object condition is performed, whereby the luminance level is raised in a low-luminance range. As a result, when wide-dynamic-range objects including the high-luminance objects and the low-luminance objects are shot, unduly high white levels of high-luminance objects and blackening of low-luminance objects are prevented and a good image is thereby produced.

摘要翻译： 提供了一种用于检测高亮度物体信号的检测部分。 通过使用所得到的检测数据，执行曝光控制，使得高亮度物体的白色电平不会变得过高。 在这种成像条件下，低亮度物体被黑化。 提供了一种伽马校正电路，可以通过补偿黑化而使低亮度物体看起来很好。 执行根据对象条件实时改变伽马连接电路的特性的控制，由此亮度水平在低亮度范围内升高。 结果，当拍摄包括高亮度物体和低亮度物体的宽动态范围物体时，防止了高亮度物体的过高的白色水平和低亮度物体的黑化，从而可以获得良好的图像 生产。

公开(公告)号：US20040041927A1

公开(公告)日：2004-03-04

申请号：US10230205

申请日：2002-08-29

发明人： Kwang-Bo Cho ,  Igor Subbotin ,  Michael Kaplinsky ,  Sandor L. Barna ,  Gary E. Slayton

IPC分类号： H04N005/202

CPC分类号： H04N5/2355 ,  H04N5/235 ,  H04N5/35554 ,  H04N5/3575 ,  H04N5/378

摘要： The invention provides a new method and apparatus for NTSC and PAL image sensors which employs fusion of adjacent row pixel charge samples to generate image data for a row. A variety of fusion schemes are possible for fusing the pixel signals from the adjacent rows. The rows of pixels are scanned so that each scan takes an odd row signal sample and, in some cases, an adjacent even row signal sample when specified conditions are met. One sampled row of the two adjacent rows integrate an image with a first integration period while the other adjacent row integrates an image with a second integration period.

摘要翻译： 本发明提供了一种用于NTSC和PAL图像传感器的新方法和装置，其使用相邻行像素电荷样本的融合来生成行的图像数据。 各种融合方案可以用于融合来自相邻行的像素信号。 扫描像素行，使得当满足特定条件时，每个扫描采取奇数行信号采样，并且在一些情况下，采用相邻偶数行信号采样。 两个相邻行的一个采样行将第一积分周期的图像整合，而另一个相邻行将图像与第二积分周期相集成。