公开(公告)号：US08873880B2

公开(公告)日：2014-10-28

申请号：US13643690

申请日：2010-04-26

申请人： Johan Schirris ,  Sasa Cvetkovic

发明人： Johan Schirris ,  Sasa Cvetkovic

IPC分类号： G06K9/40 ,  G06T5/00

CPC分类号： G06T5/00 ,  G06T5/008 ,  G06T2207/20012 ,  G06T2207/20016

摘要： A method for obtaining and/or enhancing local contrast differences (LD) in digital image input data (in), wherein a local contrast measure (SADap) approximating a two-dimensional sum of absolute difference (SAD) measure is obtained by obtaining a first-dimension sum of absolute difference measure (energyVk(m, n)) representing a sum of absolute difference (SAD) in a first dimension of at least one image region, and obtaining the local contrast measure (SADap) as a second-dimension convoluted first-dimension sum of absolute difference measure by convoluting the first-dimension sum of absolute difference measure (energyVk(m, n)) in a second dimension of the at least one image region, is proposed, wherein the step of obtaining the local contrast measure (SADap) as the second-dimension convoluted first-dimension sum of absolute differences measure further includes an addition step wherein an energy term (Δlpfk(j)) representing a first-order difference on a distance (J) of a low pass filtered signal used in obtaining the first-dimension sum of absolute differences measure (energyVk(m, n)) and in obtaining the second-dimension convoluted first-dimension sum of absolute differences measure is introduced while obtaining the local contrast measure (SADap).

摘要翻译： 一种用于获得和/或增强数字图像输入数据（in）中的局部对比度差（LD）的方法，其中通过获得第一和第二像素值获得近似绝对差（SAD）度量的二维和的局部对比度测量（SADAP） - 表示至少一个图像区域的第一维度中的绝对差（SAD）之和的绝对差测量（energyVk（m，n））的维度和，并且获得作为第二维卷积的局部对比度量（SADap） 提出了通过对所述至少一个图像区域的第二维度中的绝对差测量（energyVk（m，n））的第一维和进行卷积的绝对差测量的一维和，其中获得所述局部对比度的步骤 测量（SADap）作为绝对差异度量的第二维卷积的第一维和进一步包括加法步骤，其中表示低的距离（J）上的一阶差的能量项（＆Dgr; lpfk（j）） 通过文件 在获得局部对比度测量（SADap）的同时，引入用于获得绝对差测量（energyVk（m，n））的第一维和的和获得绝对差测量的第二维卷积的第一维和的测量信号。

公开(公告)号：US08351735B2

公开(公告)日：2013-01-08

申请号：US12303507

申请日：2006-10-18

申请人： Paul Biezen ,  Johan Schirris ,  Sasa Cvetkovic

发明人： Paul Biezen ,  Johan Schirris ,  Sasa Cvetkovic

IPC分类号： G06K9/40

CPC分类号： H04N1/4072

摘要： The present invention relates to an image processing system, method and computer program for contrast enhancement of images, and more specifically to an improvement of multi-scale adaptive gain control of images. An image processing system (1) for contrast enhancement of an input image is proposed comprising an input module (2) for receiving the input image to be processed, a filtering module (4) operable to locally process the input image by filters of different scales k, whereby for each of the different scales k a locally processed image data and at least one statistic value LSD corresponding to the locally filtered image data is generated, a combining module (5) operable to locally combine the processed image data of the different scales k using a gain function G, thereby generating a contrast enhanced image o, wherein the gain function G is dependent on the statistic value LSD corresponding to the locally processed image data of the respective scale k, and an output module (3) for outputting the contrast enhanced image whereby the gain function G comprises at least one further local dependent correction term a; b; c; d in order to suppress artefacts in the contrast enhanced image.

公开(公告)号：US20130114912A1

公开(公告)日：2013-05-09

申请号：US13643690

申请日：2010-04-26

申请人： Johan Schirris ,  Sasa Cvetkovic

发明人： Johan Schirris ,  Sasa Cvetkovic

IPC分类号： G06T5/00

CPC分类号： G06T5/00 ,  G06T5/008 ,  G06T2207/20012 ,  G06T2207/20016

摘要： A method for obtaining and/or enhancing local contrast differences (LD) in digital image input data (in), wherein a local contrast measure (SADap) approximating a two-dimensional sum of absolute difference (SAD) measure is obtained by obtaining a first-dimension sum of absolute difference measure (energyVk(m, n)) representing a sum of absolute difference (SAD) in a first dimension of at least one image region, and obtaining the local contrast measure (SADap) as a second-dimension convoluted first-dimension sum of absolute difference measure by convoluting the first-dimension sum of absolute difference measure (energyVk(m, n)) in a second dimension of the at least one image region, is proposed, wherein the step of obtaining the local contrast measure (SADap) as the second-dimension convoluted first-dimension sum of absolute differences measure further includes an addition step wherein an energy term (Δlpfk(j)) representing a first-order difference on a distance (J) of a low pass filtered signal used in obtaining the first-dimension sum of absolute differences measure (energyVk(m, n)) and in obtaining the second-dimension convoluted first-dimension sum of absolute differences measure is introduced while obtaining the local contrast measure (SADap).

摘要翻译： 一种用于获得和/或增强数字图像输入数据（in）中的局部对比度差（LD）的方法，其中通过获得第一和第二像素值获得近似绝对差（SAD）量度的二维和的局部对比度测量（SADAP） - 表示至少一个图像区域的第一维度中的绝对差（SAD）之和的绝对差测量（energyVk（m，n））的维度和，并且获得作为第二维卷积的局部对比度量（SADap） 提出了通过对所述至少一个图像区域的第二维度中的绝对差测量（energyVk（m，n））的第一维和进行卷积的绝对差测量的一维和，其中获得所述局部对比度的步骤 测量（SADap）作为绝对差异量度的二维卷积的第一维和进一步包括加法步骤，其中表示低通滤波器的距离（J）上的一阶差的能量项（Deltalpfk（j）） 在获得局部对比度测量（SADap）的同时，引入用于获得绝对差测量（energyVk（m，n））的第一维和的和获得绝对差测量的第二维卷积的第一维和的测量信号。

公开(公告)号：US08390701B2

公开(公告)日：2013-03-05

申请号：US12770447

申请日：2010-04-29

申请人： Jan Klijn ,  Johan Schirris ,  Sasa Cvetkovic ,  Peter Sturm

发明人： Jan Klijn ,  Johan Schirris ,  Sasa Cvetkovic ,  Peter Sturm

IPC分类号： H04N9/73

CPC分类号： H04N5/243 ,  H04N5/2357 ,  H04N5/35554

摘要： Methods are described for processing an image signal for double or multiple exposure cameras in order to reduce fluorescent artifact effects.

摘要翻译： 描述了用于处理双曝光或多曝光照相机的图像信号的方法，以便减少荧光伪影效应。

公开(公告)号：US20110267506A1

公开(公告)日：2011-11-03

申请号：US12770447

申请日：2010-04-29

申请人： Jan KLIJN ,  Johan Schirris ,  Sasa Cvetkovic ,  Peter Sturm

发明人： Jan KLIJN ,  Johan Schirris ,  Sasa Cvetkovic ,  Peter Sturm

IPC分类号： H04N5/217 ,  G06K9/00 ,  G06K9/40

CPC分类号： H04N5/243 ,  H04N5/2357 ,  H04N5/35554

摘要： Methods are described for processing an image signal for double or multiple exposure cameras in order to reduce fluorescent artifact effects.

摘要翻译： 描述了用于处理双曝光或多曝光照相机的图像信号的方法，以便减少荧光伪影效应。

公开(公告)号：US20090238486A1

公开(公告)日：2009-09-24

申请号：US12303507

申请日：2006-10-18

申请人： Paul Biezen ,  Johan Schirris ,  Sasa Cvetkovic

发明人： Paul Biezen ,  Johan Schirris ,  Sasa Cvetkovic

IPC分类号： G06K9/40

CPC分类号： H04N1/4072

摘要： The present invention relates to an image processing system, method and computer program for contrast enhancement of images, and more specifically to an improvement of multi-scale adaptive gain control of images. An image processing system (1) for contrast enhancement of an input image is proposed comprising an input module (2) for receiving the input image to be processed, a filtering module (4) operable to locally process the input image by filters of different scales k, whereby for each of the different scales k a locally processed image data and at least one statistic value LSD corresponding to the locally filtered image data is generated, a combining module (5) operable to locally combine the processed image data of the different scales k using a gain function G, thereby generating a contrast enhanced image o, wherein the gain function G is dependent on the statistic value LSD corresponding to the locally processed image data of the respective scale k, and an output module (3) for outputting the contrast enhanced image whereby the gain function G comprises at least one further local dependent correction term a; b; c; d in order to suppress artefacts in the contrast enhanced image.

摘要翻译： 本发明涉及用于图像对比度增强的图像处理系统，方法和计算机程序，更具体地涉及图像的多尺度自适应增益控制的改进。 提出了一种用于输入图像的对比度增强的图像处理系统（1），包括用于接收要处理的输入图像的输入模块（2），可操作以通过不同尺度的滤波器来本地处理输入图像的滤波模块（4） k，由此对于每个不同尺度，生成本地处理的图像数据和与本地滤波的图像数据相对应的至少一个统计值LSD，组合模块（5）可操作以将不同尺度的处理的图像数据k 使用增益函数G，从而生成对比度增强图像o，其中增益函数G取决于对应于各个尺度k的本地处理图像数据的统计值LSD和用于输出对比度的输出模块（3） 增强图像，由此增益函数G包括至少一个另外的局部依赖校正项a; b; C; d以抑制对比度增强图像中的人为因素。