公开(公告)号：US20070146506A1

公开(公告)日：2007-06-28

申请号：US11384063

申请日：2006-03-17

申请人： Stephen Lin ,  Baining Guo ,  Sing Kang ,  Yuanjie Zheng

发明人： Stephen Lin ,  Baining Guo ,  Sing Kang ,  Yuanjie Zheng

IPC分类号： H04N5/217

CPC分类号： H04N5/3572 ,  G06T5/007 ,  G06T7/11 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20016

摘要： A system and process for determining the vignetting function of an image and using the function to correct for the vignetting is presented. The image can be any arbitrary image and no other images are required. The system and process is designed to handle both textured and untextured segments in order to maximize the use of available information. To extract vignetting information from an image, segmentation techniques are employed that locate image segments with reliable data for vignetting estimation. Within each image segment, the system and process capitalizes on frequency characteristics and physical properties of vignetting to distinguish it from other sources of intensity variation. The vignetting data acquired from segments are weighted according to a presented reliability measure to promote robustness in estimation.

摘要翻译： 提出了一种用于确定图像的渐晕功能并使用功能来校正渐晕的系统和过程。 图像可以是任意图像，并且不需要其他图像。 系统和过程被设计为处理纹理和非纹理段，以便最大限度地利用可用信息。 为了从图像中提取渐晕信息，采用定位图像片段以进行晕影估计的可靠数据的分割技术。 在每个图像片段中，系统和过程利用渐晕的频率特性和物理特性来区别其与强度变化的其他来源。 根据提出的可靠性度量对从片段获取的渐晕数据进行加权，以提高估计的鲁棒性。

公开(公告)号：US07548661B2

公开(公告)日：2009-06-16

申请号：US11384063

申请日：2006-03-17

申请人： Stephen Lin ,  Baining Guo ,  Sing Bing Kang ,  Yuanjie Zheng

发明人： Stephen Lin ,  Baining Guo ,  Sing Bing Kang ,  Yuanjie Zheng

IPC分类号： G06K9/40

CPC分类号： H04N5/3572 ,  G06T5/007 ,  G06T7/11 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20016

摘要： A system and process for determining the vignetting function of an image and using the function to correct for the vignetting is presented. The image can be any arbitrary image and no other images are required. The system and process is designed to handle both textured and untextured segments in order to maximize the use of available information. To extract vignetting information from an image, segmentation techniques are employed that locate image segments with reliable data for vignetting estimation. Within each image segment, the system and process capitalizes on frequency characteristics and physical properties of vignetting to distinguish it from other sources of intensity variation. The vignetting data acquired from segments are weighted according to a presented reliability measure to promote robustness in estimation.

摘要翻译： 提出了一种用于确定图像的渐晕功能并使用功能来校正渐晕的系统和过程。 图像可以是任意图像，并且不需要其他图像。 系统和过程被设计为处理纹理和非纹理段，以便最大限度地利用可用信息。 为了从图像中提取渐晕信息，采用定位图像片段以进行晕影估计的可靠数据的分割技术。 在每个图像片段中，系统和过程利用渐晕的频率特性和物理特性来区分其他强度变化的来源。 根据提出的可靠性度量对从片段获取的渐晕数据进行加权，以提高估计的鲁棒性。

公开(公告)号：US20090315910A1

公开(公告)日：2009-12-24

申请号：US12487161

申请日：2009-06-18

申请人： Chandra KAMBHAMETTU ,  Yuanjie ZHENG ,  Karl STEINER ,  Thomas BAUER

发明人： Chandra KAMBHAMETTU ,  Yuanjie ZHENG ,  Karl STEINER ,  Thomas BAUER

IPC分类号： G09G5/02

CPC分类号： H04N9/75 ,  G06T7/11 ,  G06T7/194 ,  G06T11/00

摘要： Methods and systems for obtaining an alpha matte for an image are disclosed. First and second known portions of an image are determined. The alpha matte for the image is estimated based on an initial fuzzy connectedness (FC) determination between the entire image and the first and second known portions. A third known portion is obtained. The estimated alpha matte for the image is refined based on a subsequent FC determination between a subset of the image and the first, second, and third known portions for the subset of the image and the initial FC determination for a remainder of the image.

摘要翻译： 公开了用于获得图像的无光泽的方法和系统。 确定图像的第一和第二已知部分。 基于在整个图像与第一和第二已知部分之间的初始模糊连续性（FC）确定来估计图像的阿尔法无光泽度。 获得第三已知部分。 基于图像的子集与图像的子集的第一，第二和第三已知部分之间的随后的FC确定以及图像的其余部分的初始FC确定，对图像的估计的阿尔法无光泽进行细化。