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：US20100026889A1

公开(公告)日：2010-02-04

申请号：US12521072

申请日：2006-12-29

申请人： Jan Klijn ,  Luc Oosterwijk ,  Johan Schirris

发明人： Jan Klijn ,  Luc Oosterwijk ,  Johan Schirris

IPC分类号： H04N7/01

CPC分类号： H04N9/68 ,  H04N9/646

摘要： RGB to NTSC/PAL encoders—as an example—commonly convert red, green and blue colour component signals (RGB) into their corresponding luminance (luma) and chrominance (chroma) signals in the respective standards in order to generate a composite video signal which can be used in connection with television sets and the like. Thereby, roughly spoken, the luminance signal represents the monochrome or black-and-white portion of the composite video signal and the chrominance signal represents the colour portion of the composite video signal. An apparatus 1 for limiting the vector length of colour vectors U, V carrying the chroma information for a composite video signal, is disclosed, which comprises an input module 2 being operable to receive two colour signal values U, V each representing one of the colour vectors, a calculating module 7, 8, 9, 10 being operable to calculate a vector length representative of a chroma vector derived by vector addition of the two colour vectors U, V, a comparator module 13 being operable to compare the vector length representative with a limiting value, a limiting module 11, 14 being operable to limit the vector lengths of the two colour vectors and/or the two colour signal values U, V under the condition that the vector length representative exceeds the limiting value by multiplying the vector lengths and/or the values with the reciprocal value of the vector length of the chroma vector.

摘要翻译： 作为示例，RGB至NTSC / PAL编码器通常将红色，绿色和蓝色分量信号（RGB）转换为相应标准中的对应亮度（亮度）和色度（色度）信号，以便产生复合视频信号， 可以与电视机等一起使用。 因此，粗略地说，亮度信号表示复合视频信号的单色或黑白部分，色度信号表示复合视频信号的颜色部分。 公开了一种用于限制携带用于复合视频信号的色度信息的色彩矢量U，V的矢量长度的装置1，其包括输入模块2，其可操作以接收两个颜色信号值U，V，每个颜色信号值代表颜色之一 向量，计算模块7,8,9,10可操作以计算表示通过两个颜色向量U，V的向量相加导出的色度矢量的向量长度，比较器模块13可操作以将代表与 极限值，限制模块11,14可操作以在矢量长度代表超过限制值的条件下通过将矢量长度乘以来限制两个颜色矢量和/或两个颜色信号值U，V的矢量长度 和/或具有色度矢量的矢量长度的倒数值的值。

公开(公告)号：US20060164558A1

公开(公告)日：2006-07-27

申请号：US11313158

申请日：2005-12-20

申请人： Johan Schirris ,  Paul Biezen

发明人： Johan Schirris ,  Paul Biezen

IPC分类号： H04N9/77 ,  H04N5/14 ,  H04N9/64

CPC分类号： H04N9/045 ,  H04N2209/046

摘要： In a color separation circuit, a camera comprising such a color separation circuit and a color separation method, an adapted luminance signal is recovered from an image sensor signal using an adaptive wide band filter, wherein the adaptive wide band filter is controlled by the amount of a diagonal energy in the image sensor signal.

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：US20100194915A1

公开(公告)日：2010-08-05

申请号：US12678197

申请日：2008-01-09

申请人： Peter Bakker ,  Johan Schirris

发明人： Peter Bakker ,  Johan Schirris

IPC分类号： H04N9/73

CPC分类号： H04N9/045 ,  G06T3/4015 ,  G06T2200/28 ,  H04N2209/046

摘要： In a method suitable for processing colour values provided by a camera sensor comprising pixels of different colours, values of a first colour at positions of pixels of a second and a third colour are interpolated (102) based on an averaging using at least one control value.

摘要翻译： 在适于处理由包括不同颜色的像素的相机传感器提供的颜色值的方法中，基于使用至少一个控制值的平均来内插（102）第二颜色和第三颜色的像素的位置处的第一颜色的值 。

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：US20080218599A1

公开(公告)日：2008-09-11

申请号：US11995147

申请日：2005-09-19

申请人： Jan Klijn ,  Johan Schirris ,  Piet Dielhof

发明人： Jan Klijn ,  Johan Schirris ,  Piet Dielhof

IPC分类号： H04N5/235

CPC分类号： H04N5/235 ,  H04N5/2355 ,  H04N5/35581

摘要： The invention relates to an image pickup apparatus (70) comprising an image pickup means (700) for forming a plurality of image signals (S,L) having different exposure conditions, combining means for combining said plurality of image signals (L,S) to form a combined image signal having an extended dynamic range, further comprising display and/or recording means (701) for displaying and/or recording said combined image signal, further comprising a function module (79) correcting at least one of the image signals (L,S) in order to achieve a smooth transition between the image signals (S, L) at a transition point.

摘要翻译： 本发明涉及一种包括用于形成具有不同曝光条件的多个图像信号（S，L）的图像拾取装置（700）的图像拾取装置（70），用于将所述多个图像信号（L，S） 以形成具有扩展动态范围的组合图像信号，还包括用于显示和/或记录所述组合图像信号的显示和/或记录装置（701），还包括功能模块（79），校正至少一个图像信号 （L，S），以便在转变点处实现图像信号（S，L）之间的平滑过渡。

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：US07990425B2

公开(公告)日：2011-08-02

申请号：US11995147

申请日：2005-09-19

申请人： Jan Klijn ,  Johan Schirris ,  Piet Dielhof

发明人： Jan Klijn ,  Johan Schirris ,  Piet Dielhof

IPC分类号： H04N5/228 ,  H04N5/235 ,  H04N5/20

CPC分类号： H04N5/235 ,  H04N5/2355 ,  H04N5/35581

摘要： The invention relates to an image pickup apparatus (70) comprising an image pickup means (700) for forming a plurality of image signals (S,L) having different exposure conditions, combining means for combining said plurality of image signals (L,S) to form a combined image signal having an extended dynamic range, further comprising display and/or recording means (701) for displaying and/or recording said combined image signal, further comprising a function module (79) correcting at least one of the image signals (L,S) in order to achieve a smooth transition between the image signals (S, L) at a transition point.

摘要翻译： 本发明涉及一种包括用于形成具有不同曝光条件的多个图像信号（S，L）的图像拾取装置（700）的图像拾取装置（70），用于将所述多个图像信号（L，S） 以形成具有扩展动态范围的组合图像信号，还包括用于显示和/或记录所述组合图像信号的显示和/或记录装置（701），还包括功能模块（79），校正至少一个图像信号 （L，S），以便在转变点处实现图像信号（S，L）之间的平滑过渡。