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21.发明授权Producing a final modified digital image using a source digital image and a difference digital image 有权使用源数字图像和差分数字图像生成最终修改的数字图像公开(公告)号：US06775407B1
公开(公告)日：2004-08-10
申请号：US09631348
申请日：2000-08-02
IPC分类号： G06K936
CPC分类号： H04N1/3871 , H04N1/32
摘要： A method for processing a digital image in a distributed manner to produce a final modified digital image includes providing a source digital image at a first computer, providing the source digital image at a second computer, and modifying the source digital image at the second computer to form a first modified digital image. The method further includes determining a difference digital image representing the difference between the source digital image and the first modified digital image, transferring the difference digital image to the first computer, and combining the difference digital image with the source digital image at the first computer to form the final modified digital image.
摘要翻译： 以分布式方式处理数字图像以产生最终修改的数字图像的方法包括在第一计算机处提供源数字图像，在第二计算机处提供源数字图像，并将第二计算机处的源数字图像修改为 形成第一个修改后的数字图像。 该方法还包括确定表示源数字图像与第一修改数字图像之间的差异的差分数字图像，将差分数字图像传送到第一计算机，以及将差分数字图像与第一计算机处的源数字图像组合， 形成最终修改的数字图像。
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公开(公告)号：US06760485B1
公开(公告)日：2004-07-06
申请号：US09315278
申请日：1999-05-20
申请人： Paul B. Gilman , Kenneth A. Parulski , Kevin E. Spaulding , Robert P. Collette , John F. Hamilton
发明人： Paul B. Gilman , Kenneth A. Parulski , Kevin E. Spaulding , Robert P. Collette , John F. Hamilton
IPC分类号： G06K940
CPC分类号： G06T5/009 , G06T2207/10144
摘要： A method for correcting for exposure in a digital image, captured by an image capture device, including rendering such captured digital image suitable for display and displaying such captured digital image as a first displayed digital image; and using an adjustable exposure setting to nonlinearly modify the rendered captured digital image to effect an exposure change and displaying the exposure modified rendered captured digital image as a second digital image simultaneous with the first displayed digital image.
摘要翻译： 一种用于校正由图像捕获装置拍摄的数字图像中的曝光的方法，包括：渲染适合于显示的所述数字图像并显示与第一显示数字图像相关的所述数字图像; 并且使用可调节曝光设置来非线性地修改所渲染的所拍摄的数字图像以实现曝光改变，并且与第一显示的数字图像同时显示作为第二数字图像的曝光修改的被渲染的数字图像。
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23.发明授权Combining error diffusion, dithering and over-modulation for smooth multilevel printing 有权结合误差扩散，抖动和过调制来平滑多层印刷公开(公告)号：US06271936B1
公开(公告)日：2001-08-07
申请号：US09210311
申请日：1998-12-11
申请人： Qing Yu , Kevin E. Spaulding
发明人： Qing Yu , Kevin E. Spaulding
IPC分类号： H04N1405
CPC分类号： H04N1/4053 , H04N1/40087
摘要： A new multitoning technique is proposed that combines error diffusion, blue-noise dithering and over-modulation in an adaptive algorithm to achieve high quality multilevel printing with smooth texture transition. A periodic dither signal is first added to an input digital image wherein the amplitude of the periodic dither signal is a function of the input pixel value for each input pixel. The amplitude of the periodic dither signal is larger for input pixel values near the N output levels, and the amplitude of the periodic dither signal is smaller for input pixel values intermediate to the N output levels to produce a modified input image. Then, a multi-level error diffusion halftoning algorithm is applied to the modified input image wherein the error diffusion halftoning algorithm uses a set of error feedback weights which are adjusted according to the original input pixel value for each input pixel. The sum of the error feedback weights is smaller for input pixel values near the N output levels, and the sum of the error feedback weights is larger for input pixel values intermediate to the N output levels to produce an output multi-level digital image.
摘要翻译： 提出了一种新的多线程技术，将自适应算法中的误差扩散，蓝噪声抖动和过调制相结合，实现了平滑纹理转换的高质量多层次打印。 周期性抖动信号首先被添加到输入数字图像中，其中周期性抖动信号的幅度是每个输入像素的输入像素值的函数。 周期性抖动信号的幅度对于接近N个输出电平的输入像素值较大，并且周期性抖动信号的幅度对于在N个输出电平之间的输入像素值较小，以产生经修改的输入图像。 然后，将多级误差扩散半色调算法应用于经修改的输入图像，其中误差扩散半色调算法使用根据每个输入像素的原始输入像素值调整的一组误差反馈权重。 误差反馈权重的和对于N个输出电平附近的输入像素值较小，并且对于N个输出电平之间的输入像素值，误差反馈权重之和较大，以产生输出多电平数字图像。
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公开(公告)号：US5986771A
公开(公告)日：1999-11-16
申请号：US934372
申请日：1997-09-19
CPC分类号： H04N1/62
摘要： A method for determining a control signal for use in combining a first digital image that includes both a foreground region and a key color region having an associated key color with a second background digital image, both images including pixels having color values is disclosed. The method includes segmenting the first digital image into a foreground region and a key color region; and identifying transition region pixels in the first digital image that are in the vicinity of a boundary between the segmented foreground region and the segmented key color region. The method further includes computing a color difference signal between the color values of the first digital image and the key color for at least some pixels in the transition region; and computing a control signal for transition region pixels as a function of the color difference signal, where the control signal is to be used to combine the foreground region of the first digital image with the second background digital image.
摘要翻译： 公开了一种用于确定控制信号的方法，用于将包括前景区域和具有相关联的键颜色的键颜色区域的第一数字图像与第二背景数字图像组合在一起，包括具有颜色值的像素的两个图像。 该方法包括将第一数字图像分割成前景区域和键颜色区域; 以及识别在所述第一数字图像中处于所述分割的前景区域和所述分割的键颜色区域之间的边界附近的过渡区域像素。 该方法还包括计算过渡区域中的至少一些像素的第一数字图像的颜色值和键颜色之间的色差信号; 以及计算作为所述色差信号的函数的过渡区域像素的控制信号，其中所述控制信号将用于将所述第一数字图像的前景区域与所述第二背景数字图像组合。
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公开(公告)号：US5949967A
公开(公告)日：1999-09-07
申请号：US989557
申请日：1997-12-12
申请人： Kevin E. Spaulding , Kevin C. Scott
发明人： Kevin E. Spaulding , Kevin C. Scott
CPC分类号： H04N1/6058 , H04N1/6033
摘要： A method for transforming input color values to device control signals for a color printing device having an output response that is approximately invariant for ranges of the device control signals near the maximum or minimum allowable device control signals, wherein the input color values are transformed into the device control signals that are to be used to reproduce the input color values is disclosed. The method includes determining color reproduction characteristics for the color printing device over an allowable range of input signal values; determining a full color gamut for the color printing device describing a full range of color values that can be produced by the color printing device; creating a reduced color gamut by shrinking the full color gamut; and transforming the input color values to the device control signals using the determined color reproduction characteristics of the color printing device, wherein the input color values that are outside the reduced color gamut are mapped to color values that are on or within the reduced color gamut.
摘要翻译： 一种用于将输入颜色值变换为用于彩色打印装置的装置控制信号的方法，所述彩色打印装置的输出响应对于最大或最小允许装置控制信号附近的装置控制信号的范围近似不变，其中输入的颜色值被变换为 公开了要用于再现输入颜色值的设备控制信号。 该方法包括：在输入信号值的允许范围内确定彩色打印装置的色彩再现特性; 确定彩色打印装置的全色域，描述可由彩色打印装置产生的全部颜色值范围; 通过缩小全色域来产生降低的色域; 以及使用所确定的彩色打印设备的颜色再现特性将输入颜色值转换为设备控制信号，其中在缩小色域之外的输入颜色值被映射到在缩小色域之上或之内的颜色值。
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26.发明授权Partially correlated minimum visibility halftone patterns for digital printers 失效部分相关的最小可见度数字打印机的半色调图案
公开(公告)号：US5946452A
公开(公告)日：1999-08-31
申请号：US799954
申请日：1997-02-14
CPC分类号： H04N1/4051
摘要： A method for halftoning a digital image having an x,y array of pixels each having an associated input pixel value, includes the steps of providing a memory containing a dither bitmap for each input pixel value of the digital image where the dither bitmaps are partially correlated; selecting a dither bitmap corresponding to the input pixel value for a pixel in said digital image; modularly addressing the selected dither bitmap with the location of said pixel to obtain an output halftone image value; and repeating steps for each pixel in the digital image.
摘要翻译： 一种用于半色调具有每个具有相关联的输入像素值的x，y像素阵列的数字图像的方法包括以下步骤：为抖动位图部分相关的数字图像的每个输入像素值提供包含抖动位图的存储器 ; 选择与所述数字图像中的像素的输入像素值相对应的抖动位图; 以所述像素的位置模块化地寻址所选择的抖动位图以获得输出半色调图像值; 并对数字图像中的每个像素重复步骤。
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27.发明授权Combining a first digital image and a second background digital image using a key color control signal and a spatial control signal 失效使用键颜色控制信号和空间控制信号组合第一数字图像和第二背景数字图像
公开(公告)号：US5937104A
公开(公告)日：1999-08-10
申请号：US934178
申请日：1997-09-19
IPC分类号： G06T13/00 , H04N9/75 , G06K15/316
CPC分类号： H04N9/75
摘要： A method for combining a first digital image and a second background digital image, both images including pixels having color values, wherein the first digital image includes both a foreground region having foreground color values and a key color region characterized by a key color, as well as a mixed region where the pixel color values are a mixture of the foreground color value and the key color, includes determining a first control signal that indicates the relative proportions of the foreground color value and the key color for pixels in the first digital image; and segmenting the first digital image into a key color region and a non-key color region in which the non-key color region includes pixels in the first digital image that are not in the key color region. The method also includes determining a second control signal that indicates a spatial distance between the pixels in the first digital image and a boundary between the key color region and the non-key color region; and combining the first digital image and the second background digital image in response to the first and second control signals, the key color, and an illuminant color value.
摘要翻译： 一种用于组合第一数字图像和第二背景数字图像的方法，包括具有颜色值的像素的两个图像，其中所述第一数字图像包括具有前景色值的前景区域和由键颜色表征的键颜色区域 作为像素颜色值是前景颜色值和键颜色的混合的混合区域，包括确定表示第一数字图像中的像素的前景色值和键颜色的相对比例的第一控制信号; 以及将所述第一数字图像分割成其中所述非键颜色区域包括所述第一数字图像中不在所述键颜色区域中的像素的键颜色区域和非键颜色区域。 该方法还包括确定指示第一数字图像中的像素与键颜色区域和非键颜色区域之间的边界之间的空间距离的第二控制信号; 以及响应于第一和第二控制信号，键颜色和光源颜色值来组合第一数字图像和第二背景数字图像。
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28.发明授权Method and apparatus for color-correcting multi-channel signals of a digital camera 失效用于数字照相机的多声道信号的颜色校正的方法和装置
公开(公告)号：US5805213A
公开(公告)日：1998-09-08
申请号：US569645
申请日：1995-12-08
CPC分类号： H04N9/67
摘要： Multi-channel color image signals from a digital camera having multi-channel image sensors are corrected to account for variations in scene illuminant. This is accomplished by determining the scene illuminant and determining an optimum color-correction transformation in response to the scene illuminant which transform minimizes color errors between an original scene and a reproduced image by adjusting three or more parameters.
摘要翻译： 来自具有多通道图像传感器的数字照相机的多通道彩色图像信号被校正以考虑场景光源的变化。 这是通过确定场景光源并且响应于场景光源确定最佳颜色校正变换来实现的，该场景光源通过调整三个或更多个参数来最小化原始场景和再现图像之间的颜色误差。
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公开(公告)号：US5757517A
公开(公告)日：1998-05-26
申请号：US409554
申请日：1995-03-23
CPC分类号： H04N1/4052 , H04N1/4053
摘要： An error diffusion method suitable for producing an output image from an input image having a set of digitized continuous-tone pixels is disclosed. The method includes the steps of computing an image activity signal; computing a set of activity weights from the image activity signal; computing a filtered input value for a digitized continuous-tone input pixel responsive to the activity weights and computing a filtered output value responsive to the activity weights for each of the possible output levels. The method further includes selecting the output level in response to the filtered input value and the filtered output value for each of the possible output levels according to an error criterion; determining an error signal between the filtered input value and the filtered output value for the selected output level; and weighting the error signal and adjusting the filtered input values for nearby pixels which have not yet been processed.
摘要翻译： 公开了一种适用于从具有一组数字化连续色调像素的输入图像产生输出图像的误差扩散方法。 该方法包括计算图像活动信号的步骤; 从图像活动信号计算一组活动权重; 响应于活动权重计算数字化连续色调输入像素的滤波输入值，并响应于每个可能输出电平的活动权重计算滤波后的输出值。 该方法还包括根据误差准则，响应于滤波后的输入值和每个可能输出电平的滤波输出值来选择输出电平; 确定经滤波的输入值和所选输出电平的滤波输出值之间的误差信号; 并对误差信号进行加权，并调整尚未处理的附近像素的滤波输入值。
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30.发明授权Method and system for the reduction of memory capacity required for digital representation of an image 失效用于减少图像数字表示所需的存储容量的方法和系统
公开(公告)号：US5708729A
公开(公告)日：1998-01-13
申请号：US420462
申请日：1995-04-12
摘要： A method for compressing a first bit digital input representative of first pixel data into a second bit digital output representative of second pixel data, the method comprises the steps of defining a logarithmic function for converting the first bit digital input into the second bit digital output; replacing a portion of the logarithmic function with a polynomial function; and compressing the first bit digital input into the second bit digital output by utilizing the logarithmic and polynomial function.
摘要翻译： 一种用于将表示第一像素数据的第一位数字输入压缩为表示第二像素数据的第二位数字输出的方法，所述方法包括以下步骤：定义用于将第一位数字输入转换为第二位数字输出的对数函数; 用多项式函数代替一部分对数函数; 并通过利用对数和多项式函数将第一位数字输入压缩成第二位数字输出。
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