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11.发明授权公开(公告)号：US07035460B2
公开(公告)日：2006-04-25
申请号：US10161117
申请日：2002-05-31
CPC分类号： H04N1/6058
摘要： A method for constructing an extended color gamut digital image from a limited color gamut digital image which was derived from a first extended color gamut image includes providing a modified inverse color adjustment function which when such function operates on a limited color gamut digital image an extended color gamut digital image having reduced highlight color saturation for highlight color values when compared with corresponding color values of the first extended color gamut image is produced, and operating on the limited color gamut digital image with the modified inverse color adjustment function to construct the extended color gamut digital image with reduced color saturation for highlight color values that results in reduced levels of color contouring and quantization artifacts.
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公开(公告)号：US06577378B1
公开(公告)日：2003-06-10
申请号：US09643544
申请日：2000-08-22
IPC分类号： G03B2772
CPC分类号： G03B27/545 , G03B17/24 , G03B27/725
摘要： An apparatus and method for compensating for light falloff in a film master frame of a photographic image. A masking unit is positioned between the master frame and copy material in an optical printer. The masking unit may be an LCD panel. A controller calculates a light falloff compensation function to produce a light falloff correction parameter that is used to control the transmittance values of a plurality of pixels in the masking unit. When a photographic copy is made, the masking function serves to counteract light falloff that existed in the master frame to produce a copy with reduced effect from light falloff. Control and selection of the light falloff compensation function can be based on a number of factors related to the camera type, lens type, film type, flash type, and other factors that created the light falloff on the master frame. In addition, one or more of the master frames from a roll of film may be scanned to generate data to drive the light falloff compensation function. The data may be averaged to improve performance of the system.
摘要翻译： 一种用于补偿摄影图像的胶片主框架中的光衰减的装置和方法。 掩模单元位于主机架和光学打印机中的复印材料之间。 掩模单元可以是LCD面板。 控制器计算光衰减补偿功能，以产生用于控制掩蔽单元中的多个像素的透射率值的光衰减校正参数。 当进行照相复印时，掩蔽功能用于抵消存在于主框架中的光衰减，以产生具有减轻的光衰减效果的副本。 光衰减补偿功能的控制和选择可以基于与相机类型，镜头类型，胶片类型，闪光灯类型以及在主镜架上产生光衰减的其他因素相关的多个因素。 此外，可以扫描来自一卷胶片的一个或多个主帧以产生数据以驱动光衰减补偿功能。 可以对数据进行平均以改善系统的性能。
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13.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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15.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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17.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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18.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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19.发明授权Method and apparatus for exposure control for a sparsely sampled extended dynamic range image sensing device 有权用于稀疏采样的扩展动态范围图像感测装置的曝光控制的方法和装置公开(公告)号：US06813046B1
公开(公告)日：2004-11-02
申请号：US09707673
申请日：2000-11-07
IPC分类号： H04N146
CPC分类号： H04N5/235 , H04N5/2352 , H04N9/045
摘要： A method of exposure control in a camera employing a sparsely sampled extended dynamic range image sensing device includes the steps of: providing a sparsely sampled extended dynamic range image sensing device having fast photosites with a predetermined response to light exposure interspersed with slow photosites with a slower response to the same light exposure; using the image sensor to produce a sparsely sampled high resolution digital image having fast pixel values produced by the fast photosites and slow pixel values produced by the slow photosites; calculating an exposure control value using only the slow pixel values from the a sparsely sampled extended dynamic range image; and using the exposure control value to modify the exposure to the image sensing device.
摘要翻译： 在采用稀疏采样的扩展动态范围图像感测装置的相机中的曝光控制的方法包括以下步骤：提供具有预定响应的具有快速光斑的稀疏采样的扩展动态范围图像感测装置，其中散射具有较慢光斑的光照 对相同的曝光反应; 使用图像传感器产生具有由快速光斑产生的快速像素值和由慢光斑产生的慢像素值的稀疏采样的高分辨率数字图像; 使用来自稀疏采样的扩展动态范围图像的慢像素值来计算曝光控制值; 并且使用曝光控制值来修改对图像感测装置的曝光。
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20.发明授权Method for compressing an image from a sparsely sampled extended dynamic range image sensing device 有权用于从稀疏采样的扩展动态范围图像感测装置压缩图像的方法公开(公告)号：US06765611B1
公开(公告)日：2004-07-20
申请号：US09718887
申请日：2000-11-21
IPC分类号： H04N5228
CPC分类号： H04N9/045 , H04N5/35563
摘要： A method of producing a compressed image from a full resolution sparsely sampled extended dynamic range image produced by a sparsely sampled extended dynamic range image sensing device having fast photosites with a predetermined response to a light exposure for producing fast pixel values and slow photosites with a slower response to the same light exposure for producing slow pixel values, including the steps of: providing a full resolution sparsely sampled extended dynamic range image; separating the full resolution sparsely sampled image into a fast image comprising only fast pixel values and a slow image comprising only slow pixel values; and separately compressing the fast image and the slow image.
摘要翻译： 一种从由分辨率稀疏采样的扩展动态范围图像产生的压缩图像的方法，该扩展动态范围图像由具有快速光斑的稀疏采样的扩展动态范围图像感测装置产生，具有对曝光的预定响应以产生快速像素值，并且具有较慢的光照 响应于相同的曝光以产生慢像素值，包括以下步骤：提供全分辨率稀疏采样的扩展动态范围图像; 将全分辨率稀疏采样图像分离成仅包括快速像素值的快速图像和仅包括慢像素值的慢图像; 并分别压缩快速图像和慢速图像。
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