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公开(公告)号：US08265420B2
公开(公告)日：2012-09-11
申请号：US12874809
申请日：2010-09-02
申请人： Suhail S. Saquib , Jay E. Thornton
发明人： Suhail S. Saquib , Jay E. Thornton
IPC分类号： G06K9/40
CPC分类号： H04N1/4072
摘要： Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.
摘要翻译： 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后，可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光，使用预测器来预测图像的期望曝光校正，以及通过以下方式校正图像的曝光： 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动态范围压缩到RGB数字空间的小动态范围的S形曲线。
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公开(公告)号：US07826660B2
公开(公告)日：2010-11-02
申请号：US11546633
申请日：2006-10-12
申请人： Suhail S. Saquib , Jay E. Thornton
发明人： Suhail S. Saquib , Jay E. Thornton
IPC分类号： G06K9/00
CPC分类号： H04N1/4072
摘要： Techniques are disclosed for correcting the exposure of a digital image. An exposure predictor may be generated based on a set of images for which ground truth data are known. After identifying an optimal set of features, the exposure of the digital image may be corrected by extracting values of the selected optimal features from the image, using the predictor to predict a desired exposure correction for the image, and correcting the exposure of the image by the predicted desired amount. Exposure correction is based on a model that relates intensity of light in the world to the RGB digits of the digital image. The model comprises a gamma function that models the response of a typical monitor and a S-shaped curve that compresses the large dynamic range of the world to the small dynamic range of the RGB digit space.
摘要翻译： 公开了用于校正数字图像的曝光的技术。 可以基于已知地面实数数据的一组图像来生成曝光预测器。 在识别特征的最佳集合之后，可以通过从图像中提取所选择的最佳特征的值来校正数字图像的曝光，使用预测器来预测图像的期望曝光校正，以及通过以下方式校正图像的曝光： 预期的预期量。 曝光校正基于将世界光线与数字图像的RGB数字相关联的模型。 该模型包括对典型监视器的响应进行建模的伽玛函数和将世界的大动态范围压缩到RGB数字空间的小动态范围的S形曲线。
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公开(公告)号：US20080007700A1
公开(公告)日：2008-01-10
申请号：US11483987
申请日：2006-07-10
申请人： Jeroen vanBaar , Ramesh Raskar , Jay E. Thornton
发明人： Jeroen vanBaar , Ramesh Raskar , Jay E. Thornton
IPC分类号： G03B21/26
CPC分类号： H04N9/3185 , H04N9/3147 , H04N9/3194
摘要： A system and method aligns an array of projectors by performing independently a parametric coarse alignment for each projector, and by performing jointly a non-parametric fine alignment for each projector and adjacent projectors. The non-parametric fine alignment can also be performed independently for each projector.
摘要翻译： 系统和方法通过独立执行每个投影机的参数粗对准，并且通过共同为每个投影仪和相邻投影机共同执行非参数精细对准来对准投影仪阵列。 也可以对每台投影机独立执行非参数精细对准。
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公开(公告)号：US07166558B2
公开(公告)日：2007-01-23
申请号：US10806749
申请日：2004-03-23
申请人： Jayprakash C. Bhatt , Brian D. Busch , Daniel P. Bybell , F. Richard Cottrell , Anemarie DeYoung , Chien Liu , Stephen J. Telfer , Jay E. Thornton , William T. Vetterling
发明人： Jayprakash C. Bhatt , Brian D. Busch , Daniel P. Bybell , F. Richard Cottrell , Anemarie DeYoung , Chien Liu , Stephen J. Telfer , Jay E. Thornton , William T. Vetterling
IPC分类号： B41M5/40
CPC分类号： B41J2/32 , B41J2/36 , B41M5/3275 , B41M5/3335 , B41M5/3336 , B41M5/34 , B41M5/40 , B41M5/42 , B41M5/426 , B41M5/44 , B41M2205/04 , B41M2205/38 , G03C1/52
摘要： A multicolor imaging system is described wherein at least two, and preferably three, different image-forming layers of a thermal imaging member are addressed at least partially independently by a thermal printhead or printheads from the same surface of the imaging member by controlling the temperature of the thermal printhead(s) and the time thermal energy is applied to the image-forming layers. Each color of the thermal imaging member can be printed alone or in selectable proportion to the other color(s). Novel thermal imaging members are also described.
摘要翻译： 描述了一种多色成像系统，其中热成像构件的至少两个，优选三个不同的成像层至少部分地由来自成像构件的相同表面的热打印头或打印头独立地寻址， 热打印头和时间热能被施加到图像形成层。 热成像构件的每种颜色可以单独打印或以可选择的比例打印到其他颜色。 还描述了新的热成像构件。
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公开(公告)号：US06937365B2
公开(公告)日：2005-08-30
申请号：US09870537
申请日：2001-05-30
CPC分类号： H04N1/4053
摘要： An adaptive halftoning method where the difference between a digital image and a filtered digital image is introduced into the system on a pixel by pixel basis is disclosed. In this method, each input difference pixel has a corresponding error value of the previous pixel added to the input value at a summing node, resulting in modified image difference data; the modified image difference data is passed to a threshold comparator where the modified image difference data is compared to a threshold value, the threshold value varying according to the properties of the digital image, to determine the appropriate output level; the output level is subtracted from the modified image difference value to produce the input to an error filter; the output of the error filter is multiplied by an adaptation coefficient, where the adaptation coefficient varies according to the properties of the digital image, to generate the error level for the subsequent input pixel; and, the cyclical processing of pixels is continued until the end of the input data is reached.
摘要翻译： 公开了一种自适应半色调方法，其中数字图像和滤波数字图像之间的差异被逐个引入到系统中。 在该方法中，每个输入差分像素具有在求和节点附加到输入值的先前像素的对应误差值，导致修改的图像差异数据; 修改后的图像差分数据被传送到阈值比较器，其中将修改的图像差异数据与阈值进行比较，阈值根据数字图像的属性而变化，以确定适当的输出电平; 从修改的图像差值中减去输出电平以产生到误差滤波器的输入; 误差滤波器的输出乘以自适应系数，其中自适应系数根据数字图像的属性而变化，以产生后续输入像素的误差电平; 并且像素的循环处理继续进行，直到达到输入数据的结尾。
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公开(公告)号：US06842186B2
公开(公告)日：2005-01-11
申请号：US10080883
申请日：2002-02-22
申请人： Alain Bouchard , Brian D. Busch , Daniel P. Bybell , Anemarie DeYoung , Sandra B. Lawrence , Michael L. Reisch , Suhail S. Saquib , Dana F. Schuh , Stephen J. Telfer , Jay E. Thornton , William T. Vetterling , Michael S. Viola
发明人： Alain Bouchard , Brian D. Busch , Daniel P. Bybell , Anemarie DeYoung , Sandra B. Lawrence , Michael L. Reisch , Suhail S. Saquib , Dana F. Schuh , Stephen J. Telfer , Jay E. Thornton , William T. Vetterling , Michael S. Viola
CPC分类号： B41J2/3555 , B41J2/325 , B41J2/36 , G07F17/26 , H04N1/00132 , H04N1/00167 , H04N1/00169 , H04N1/00188 , H04N1/34 , H04N2201/0065
摘要： A thermal printer is disclosed which includes a plurality of thermal print heads, each of the plurality of thermal print heads being operable to print a distinct one of a plurality of colors. The plurality of thermal print heads may print output at a plurality of spatial resolutions. The thermal printer may include dot size varying means for varying perceived levels of color printed by the thermal printer by varying sizes of dots printed by the plurality of thermal print heads. The printer may perform various image processing steps on an image to be printed, such as tone scale adjustment, thermal history control, and common mode voltage correction, to improve the perceived quality of the printed image. The thermal printer may be incorporated into a digital photo-printing vending machine for printing images provided by a customer.
摘要翻译： 公开了一种热敏打印机，其包括多个热打印头，多个热打印头中的每一个可操作以打印多种颜色中的不同的一种。 多个热敏打印头可以以多个空间分辨率打印输出。 热敏打印机可以包括点尺寸变化装置，用于通过改变由多个热打印头打印的点的尺寸来改变由热敏打印机印刷的颜色的感知水平。 打印机可以对要打印的图像执行各种图像处理步骤，例如色阶调节，热历史控制和共模电压校正，以提高打印图像的感知质量。 热敏打印机可以结合到用于打印客户提供的图像的数字照片打印自动售货机中。
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公开(公告)号：US6128415A
公开(公告)日：2000-10-03
申请号：US709487
申请日：1996-09-06
CPC分类号： G06T1/00
摘要： Device profiles conventionally describe properties of a device or element within a digital image processing system that capture, transform or render color components of an image. An improved device profile includes both chromatic characteristic information and spatial characteristic information. The device profile is generated by use of both chromatic and spatial characteristic functions within a model based image processing system to predict both color and spatial characteristics of a processed image. The device profile generally includes: first data for describing a device dependent transformation of color information content of the image; and second data for describing a device dependent transformation of spatial information content of the image. In a special case, the device profile could contain only spatial characteristic information.
摘要翻译： 设备配置文件通常描述数字图像处理系统内捕获，变换或渲染图像的颜色分量的设备或元件的属性。 改进的设备简档包括彩色特征信息和空间特征信息。 通过在基于模型的图像处理系统内使用色彩和空间特征函数来生成设备简档，以预测处理的图像的颜色和空间特性。 设备简档通常包括：用于描述图像的颜色信息内容的设备相关变换的第一数据; 以及用于描述图像的空间信息内容的设备相关变换的第二数据。 在特殊情况下，设备配置文件只能包含空间特征信息。
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公开(公告)号：US6008907A
公开(公告)日：1999-12-28
申请号：US950580
申请日：1997-10-15
CPC分类号： H04N1/6033
摘要： A system and method for calibrating a printer includes the steps or functions of: printing a predetermined color test pattern with the printer by transforming data, representing said predetermined color test pattern, from a device-independent color space to a device-dependent color space associated with the printer by use of a color transform, said predetermined color test pattern including a set of color patches with one of said color patches representing a preferred mid-gray hue; providing a predetermined reference gray surface; comparing said reference gray surface to said set of colored patches of the printed test pattern to find a closest matching one of said patches, if the closest matching one of said patches is the patch representing the preferred mid-gray hue, then ending the method; otherwise determining, for each color channel of the printer, a solution set of correction values as a function of believed gray versus actual gray, said solution set derived from and including a white point, a black point and a point mapped at {G.sub.b, G.sub.a } where G.sub.b is the believed gray value of the closest matching one of said patches and G.sub.a is the actual gray value of the closest matching one of said patches; and adding to the color transform the corresponding solution set for each color channel of the printer.
摘要翻译： 用于校准打印机的系统和方法包括以下步骤或功能：通过将表示所述预定颜色测试图案的数据从与设备无关的色彩空间转换为相关联的与设备有关的颜色空间来打印预定颜色测试图案 与所述打印机通过使用颜色变换，所述预定颜色测试图案包括一组色块，其中一个所述色标表示优选的中间灰色色调; 提供预定的参考灰度表面; 将所述参考灰度表面与所述印刷测试图案的所述彩色贴片组进行比较，以找到所述贴片中最接近的一个所述贴片，如果所述贴片中最接近的一个贴片是表示优选中间灰色色调的贴片，则结束该方法; 否则，对于打印机的每个颜色通道，确定作为相信灰色与实际灰色的函数的校正值的解集合，所述解决方案集源自并包括白点，黑点和映射在{Gb，Ga 其中Gb是所述贴片中最接近匹配的一个的相信灰度值，Ga是所述贴片中最接近匹配的一个的实际灰度值; 并添加到打印机的每个颜色通道的颜色变换相应的解决方案集。
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9.发明授权Image rendering system and method for generating stochastic threshold arrays for use therewith 失效用于产生随机阈值阵列的图像渲染系统和方法
公开(公告)号：US5745660A
公开(公告)日：1998-04-28
申请号：US427880
申请日：1995-04-26
CPC分类号： H04N1/4051
摘要： An image rendering system, for generating discrete tone image data representing a continuous-tone image for rendering by a rendering device, the image rendering system includes a stochastic threshold array generating arrangement and an image data processing section. The stochastic threshold array generating arrangement generates a plurality of stochastic threshold arrays from a random seed pattern that have been subsequently optimized to reduce image artifacts in the rendering of tones. Each pattern is optimized to reflect (i) a selected trade-off between grain and possible mottle in the rendered image, (ii) distortions introduced by the rendering device in rendering an image defined by the pattern and an observer in viewing the image, and (iii) boundary effects so that the patterns, when tiled together, have optimal visual characteristics proximate their respective edges. The image data processing section processes the continuous tone image data in relation to the stochastic threshold arrays generated by the stochastic threshold array generating arrangement. The image data processing section may be used to either randomly tile, or tile in an ordered way, the stochastic threshold arrays over the continuous-tone image data and generates the discrete tone image data in response to correspondingly positioned pixels of the continuous-tone image data and threshold values of the stochastic threshold arrays.
摘要翻译： 一种图像再现系统，用于生成表示由渲染装置呈现的连续色调图像的离散色调图像数据，所述图像渲染系统包括随机阈值阵列产生装置和图像数据处理部分。 随机阈值阵列产生装置从随机优化的随机种子模式生成多个随机阈值阵列，以减少色调呈现中的图像伪影。 每个图案被优化以反映（i）在渲染图像中的纹理和可能斑点之间的选择权衡，（ii）渲染设备在渲染由图案定义的图像和观察者观看图像时引入的失真，以及 （iii）边界效应，使得当平铺在一起时，图案在它们各自的边缘附近具有最佳视觉特征。 图像数据处理部分针对由随机阈值阵列产生装置产生的随机阈值阵列处理连续色调图像数据。 图像数据处理部分可以用于随机地平铺或以有序的方式平铺连续色调图像数据上的随机阈值阵列，并且响应于连续色调图像的相应定位的像素生成离散色调图像数据 随机阈值阵列的数据和阈值。
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公开(公告)号：US5696612A
公开(公告)日：1997-12-09
申请号：US434651
申请日：1995-05-04
申请人： Jay E. Thornton
发明人： Jay E. Thornton
CPC分类号： H04N1/648 , H04N1/40087
摘要： An image rendering system for generating discrete tone image data for representing continuous tone image data to be rendered by a rendering device. The continuous tone image data includes a plurality of pixel values each associated with a pixel. The rendering device renders a colorant in a plurality of colorant densities. The image rendering system comprises a threshold array, preferably stochastic, a colorant density array, and a colorant density supply arrangement. The threshold array comprising a plurality of threshold values. The colorant density array comprises a plurality of array elements, each associated with one of said pixel values and one of said threshold values. Each of the array elements identifies a particular one of a plurality of colorant density values each associated with one of the colorant densities rendered by said rendering device. The colorant density supply arrangement, for each pixel, uses the pixel value associated with the pixel and a threshold value from the threshold array to identify an array element of the colorant density array, whose colorant density value will be rendered by rendering device for the pixel in the rendered image.
摘要翻译： 一种图像渲染系统，用于产生用于表示由渲染装置呈现的连续色调图像数据的离散色调图像数据。 连续色调图像数据包括与像素相关联的多个像素值。 渲染装置使着色剂成为多种着色剂密度。 图像渲染系统包括阈值阵列，优选随机的着色剂密度阵列和着色剂密度供应装置。 阈值阵列包括多个阈值。 着色剂浓度阵列包括多个阵列元件，每个阵列元件与所述像素值之一和所述阈值之一相关联。 每个阵列元素识别多个着色剂浓度值中的特定的一个，每个着色剂浓度值与由所述再现装置呈现的着色剂浓度之一相关联。 对于每个像素，着色剂浓度供应布置使用与像素相关联的像素值和来自阈值阵列的阈值来识别着色剂浓度阵列的阵列元素，其着色剂浓度值将通过用于像素的再现装置 在渲染的图像。
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