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：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。

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：US07639288B2

公开(公告)日：2009-12-29

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： H04N9/68 ,  H04N9/77

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.

摘要翻译： 在色分离电路中，包括这种色分离电路和色分离方法的照相机，使用自适应宽带滤波器从图像传感器信号中恢复适应的亮度信号，其中自适应宽带滤波器由 图像传感器信号中的对角能量。