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41.发明授权Method for preserving image detail when adjusting the tone scale of a digital color image 有权调整数字彩色图像色调时保留图像细节的方法公开(公告)号：US06453075B1
公开(公告)日：2002-09-17
申请号：US09223881
申请日：1998-12-31
IPC分类号： G06K940
CPC分类号： H04N1/58 , H04N1/6027
摘要： A method for preserving spatial detail when adjusting the tone scale of a digital color image, the method comprises receiving a digital color image; providing a tone scale function for adjusting the tone scale of the digital color image; generating a luminance signal from the digital color image; using the tone scale function and the control signal applied to each color channel of the digital color image to produce an enhanced digital color image.
摘要翻译： 一种在调整数字彩色图像的色阶时保持空间细节的方法，所述方法包括：接收数字彩色图像; 提供用于调整数字彩色图像的色阶的色调函数; 从数字彩色图像生成亮度信号; 使用色调函数和施加到数字彩色图像的每个颜色通道的控制信号来产生增强的数字彩色图像。
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公开(公告)号：US06275605B1
公开(公告)日：2001-08-14
申请号：US09232537
申请日：1999-01-18
IPC分类号： G06K900
摘要： A method for adjusting tone scale of a digital image, the method comprises the step of receiving a digital image channel from the digital image; providing a tone scale function for adjusting the tone scale of the digital image channel; calculating a difference signal derived from the digital image channel and the tone scale function; calculating a compensation signal derived from a filtered version of the difference signal; and combining the digital image channel and the compensation signal to generate a modified digital image channel.
摘要翻译： 一种用于调整数字图像的色调的方法，所述方法包括从数字图像接收数字图像通道的步骤; 提供用于调整数字图像通道的色阶的色调函数; 计算从数字图像通道导出的差分信号和色阶函数; 计算从差分信号的滤波版本导出的补偿信号; 并组合数字图像通道和补偿信号以产生经修改的数字图像通道。
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43.发明授权Selection of alternative image processing operations to maintain high image quality 有权选择替代图像处理操作以保持高图像质量公开(公告)号：US07570829B2
公开(公告)日：2009-08-04
申请号：US11059935
申请日：2005-02-17
申请人： Raymond W. Ptucha , William V. Fintel , Andrew C. Gallagher , Edward B. Gindele , Jeffrey C. Snyder , Kevin E. Spaulding
发明人： Raymond W. Ptucha , William V. Fintel , Andrew C. Gallagher , Edward B. Gindele , Jeffrey C. Snyder , Kevin E. Spaulding
CPC分类号： G06T5/40 , G06T5/009 , G06T2207/20016 , H04N1/60
摘要： In an image enhancement method, a regular enhancement function and an aggressiveness parameter are computed using characteristics of a digital image. A first, relatively slow enhancement algorithm is applied to the digital image using the regular enhancement function, when an aggressiveness parameter is in a predetermined high range. A second, relatively fast enhancement algorithm is applied to the digital image using the regular enhancement function, when an aggressiveness parameter is in a predetermined low range. A modified enhancement function is calculated using characteristics of the digital image and is used with a second, relatively fast enhancement algorithm, when the aggressiveness parameter is in a predetermined medium range.
摘要翻译： 在图像增强方法中，使用数字图像的特征来计算常规增强函数和侵略性参数。 当攻击性参数处于预定的高范围时，使用常规增强功能将第一相对较慢的增强算法应用于数字图像。 当攻击性参数处于预定的低范围时，使用常规增强功能将第二相对较快的增强算法应用于数字图像。 使用数字图像的特性来计算修改的增强函数，并且当攻击性参数处于预定的中等范围时，使用第二相对较快的增强算法。
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公开(公告)号：US20080192115A1
公开(公告)日：2008-08-14
申请号：US12106378
申请日：2008-04-21
IPC分类号： H04N7/18
摘要： A method for producing a distance map of scene distance values for a digital image captured by a digital camera includes capturing a first digital image of a scene under a first illumination condition, wherein the first digital image includes a plurality of pixels and the scene includes a plurality of scene objects located at different distances from the digital camera, capturing a second digital image of the scene under a second illumination condition that is different from the first illumination condition, and using the first and second digital images to produce a distance map having a plurality of scene distance values, wherein each scene distance value relates to the distance between the digital camera and the corresponding scene object.
摘要翻译： 用于产生由数字照相机拍摄的数字图像的场景距离值的距离图的方法包括：在第一照明条件下拍摄场景的第一数字图像，其中所述第一数字图像包括多个像素，并且所述场景包括 位于与数字照相机不同距离的多个场景对象，在与第一照明条件不同的第二照明条件下拍摄场景的第二数字图像，并且使用第一和第二数字图像来产生具有 多个场景距离值，其中每个场景距离值涉及数字照相机和对应的场景对象之间的距离。
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45.发明授权公开(公告)号：US07280703B2
公开(公告)日：2007-10-09
申请号：US10294860
申请日：2002-11-14
CPC分类号： G06T5/004 , G06T5/007 , G06T2207/20016 , G06T2207/20064
摘要： A method of processing a color digital image having a luminance channel and one or more chrominance channels to improve the tone scale characteristics of the image, includes the steps of: producing a control signal from the one or more chrominance channels; generating a pedestal signal containing mainly low frequency modulation by filtering the luminance channel with a spatial filter, whereby the operation of the spatial filter is modulated by the control signal; and producing a texture signal by subtracting the pedestal signal from the luminance channel.
摘要翻译： 一种处理具有亮度通道和一个或多个色度通道的彩色数字图像以改善图像的色阶特性的方法包括以下步骤：从一个或多个色度通道产生控制信号; 通过利用空间滤波器对亮度信道进行滤波来生成主要包含低频调制的基座信号，从而通过控制信号调制空间滤波器的动作; 并通过从亮度通道中减去基座信号来产生纹理信号。
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公开(公告)号：US07158174B2
公开(公告)日：2007-01-02
申请号：US10116475
申请日：2002-04-04
CPC分类号： H04N9/735
摘要： A method of adjusting the color characteristics of a digital image includes receiving a digital image including a plurality of pixels, receiving non-pixel data relating to camera capture parameters including an aperture value, an exposure time value, and a speed value specific to the received digital image; using the aperture value, time value, and speed value to calculate a scene brightness value; and using the calculated scene brightness value to adjust the color of the digital image.
摘要翻译： 一种调整数字图像的颜色特性的方法包括：接收包括多个像素的数字图像，接收与摄像机拍摄参数有关的非像素数据，所述相机拍摄参数包括孔径值，曝光时间值以及所接收的特定的速度值 数字图像; 使用光圈值，时间值和速度值来计算场景亮度值; 并使用计算出的场景亮度值来调整数字图像的颜色。
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公开(公告)号：US07065255B2
公开(公告)日：2006-06-20
申请号：US10139728
申请日：2002-05-06
CPC分类号： H04N1/58 , H04N1/00132 , H04N1/00137 , H04N1/00167 , H04N1/33376 , H04N5/357 , H04N2201/3204 , H04N2201/3205 , H04N2201/3242 , H04N2201/3252 , H04N2201/3274 , H04N2201/3278 , H04N2201/33357
摘要： A method and apparatus for enhancing a digital image captured by a digital camera: provides one or more data selected from the group consisting of camera model type, image sensor type, type of light source, type of image compression, previous noise reduction processing history, previous spatial sharpening processing history, and camera noise magnitude; employs the one or more data to generate one or more noise processing parameters; and employs the one or more noise processing parameters to enhance the spatial detail of the digital image.
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48.发明授权公开(公告)号：US07024054B2
公开(公告)日：2006-04-04
申请号：US10256900
申请日：2002-09-27
IPC分类号： G06K9/36
摘要： A technique for producing a foreground mask from a digital image is based on receiving two digital images, wherein a first digital image is derived from a first original scene image including a foreground photographed against a background having arbitrary and unknown content matter, and a second digital image is derived from a second original scene image including substantially the same background but without the foreground. The second digital image is automatically aligned to the first digital image without user intervention to generate an aligned digital image including the background without the foreground. Then, using the first digital image and the aligned digital image, a foreground mask is produced relating to the spatial regions in the first digital image pertaining to the foreground, whereby the foreground mask is subsequently used to generate a composite digital image.
摘要翻译： 一种用于从数字图像产生前景蒙版的技术是基于接收两个数字图像，其中第一数字图像是从第一原始场景图像导出的，该第一原始场景图像包括针对具有任意和未知内容物质的背景拍摄的前景，以及第二数字图像 图像从包括基本上相同的背景但没有前景的第二原始场景图像导出。 第二数字图像在没有用户干预的情况下自动对准第一数字图像，以产生包括背景而不具有前景的对准的数字图像。 然后，使用第一数字图像和对准的数字图像，产生与属于前景的第一数字图像中的空间区域相关的前景掩模，由此前景掩模随后用于生成复合数字图像。
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49.发明授权Method of enhancing the tone scale of a digital image to extend the linear response range without amplifying noise 有权提高数字图像色阶的方法，以扩大线性响应范围而不放大噪声公开(公告)号：US06937775B2
公开(公告)日：2005-08-30
申请号：US10145937
申请日：2002-05-15
CPC分类号： G06K9/40 , G06T5/002 , G06T5/009 , G06T5/20 , G06T2207/10008 , G06T2207/10024 , G06T2207/20016 , G06T2207/20064
摘要： A method of processing a digital image to improve contrast, the digital image being derived from an image captured by a recording medium having a nonlinear response to light, includes the steps of: applying a spatial filter to the digital image to produce a noise reduced digital image; subtracting the noise reduced digital image from the digital image to produce a difference digital image; applying a tone scale function to the noise reduced digital image to produce a tone scale adjusted digital image having the appearance of being derived from an image captured by a recording medium having a linear response; and combining the difference digital image with the tone scale adjusted digital image to produce a processed digital image, whereby the contrast of the digital image is improved without amplifying noise.
摘要翻译： 一种处理数字图像以改善对比度的方法，所述数字图像是从对具有对光的非线性响应的记录介质捕获的图像导出的，包括以下步骤：将空间滤波器应用于数字图像，以产生噪声减小的数字 图片; 从数字图像中减去噪声减小的数字图像以产生差分数字图像; 对噪声降低的数字图像应用色阶函数，以产生具有由具有线性响应的记录介质拍摄的图像导出的外观的色调调节数字图像; 并且将差分数字图像与色调调节数字图像组合以产生经处理的数字图像，从而在不放大噪声的情况下改善数字图像的对比度。
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50.发明授权公开(公告)号：US06934421B2
公开(公告)日：2005-08-23
申请号：US10102485
申请日：2002-03-20
摘要： A method for estimating a noise characteristic value for a plurality of digital images that are affected by a common noise source includes receiving a plurality of source digital images that are affected by a common noise source, each source digital image including a plurality of pixels; calculating a total number of pixels included in the source digital images; and receiving a predetermined target number of noise estimates to be calculated for the source digital images. The method also includes using the total number of pixels and the predetermined target number of noise estimates to calculate one or more pixel sampling parameters for the source digital images; using the source digital images and the one or more pixel sampling parameters to calculate a predetermined number of noise estimates; and using the noise estimates to calculate a noise characteristic value for the source digital images.
摘要翻译： 用于估计受共同噪声源影响的多个数字图像的噪声特性值的方法包括：接收受共同噪声源影响的多个源数字图像，每个源数字图像包括多个像素; 计算源数字图像中包括的像素总数; 并接收针对源数字图像计算的预定目标数量的噪声估计值。 该方法还包括使用总数量和预定目标数量的噪声估计来计算源数字图像的一个或多个像素采样参数; 使用源数字图像和一个或多个像素采样参数来计算预定数量的噪声估计; 并使用噪声估计来计算源数字图像的噪声特征值。
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