公开(公告)号：US08514166B2

公开(公告)日：2013-08-20

申请号：US12129305

申请日：2008-05-29

申请人： Min Chen ,  Huajun Peng ,  Guoping Qiu ,  Chun Kit Hung ,  Wei Zhang

发明人： Min Chen ,  Huajun Peng ,  Guoping Qiu ,  Chun Kit Hung ,  Wei Zhang

IPC分类号： G09G3/36

CPC分类号： G09G3/3611 ,  G09G3/3406 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold.

摘要翻译： 一种降低由背光装置照亮的液晶显示器中的功耗的方法包括使背光调光并调节图像的强度以补偿暗淡的背光。 用于背光的调光因子基于根据图像信号的像素强度分布确定的剪切点。 基于调光因子调整图像的强度，其中使用第一色调映射函数来调整低于强度阈值的像素强度，并且使用第二色调映射函数来调整高于强度阈值的像素强度。

公开(公告)号：US08311361B2

公开(公告)日：2012-11-13

申请号：US12195976

申请日：2008-08-21

申请人： Min Chen ,  Huajun Peng ,  Guoping Qiu

发明人： Min Chen ,  Huajun Peng ,  Guoping Qiu

IPC分类号： G06K9/40 ,  G09G5/00

CPC分类号： G06T5/009

摘要： Enhancement of an image includes adjusting its brightness and then adjusting the contrast of the brightness adjusted image. Adjusting the brightness uses an estimation of real world luminance. Contrast adjustment involves extracting background and contrast information, adjusting the contrast information by an adjustment factor based on the background information and combining the background corrected contrast information to obtain an output image.

摘要翻译： 图像的增强包括调整其亮度，然后调节亮度调节图像的对比度。 调整亮度使用真实世界亮度的估计。 对比度调整涉及提取背景和对比度信息，通过基于背景信息的调整因子调整对比度信息并组合背景校正对比度信息以获得输出图像。

公开(公告)号：US20100046852A1

公开(公告)日：2010-02-25

申请号：US12195976

申请日：2008-08-21

申请人： Min Chen ,  Huajun Peng ,  Guoping Qiu

发明人： Min Chen ,  Huajun Peng ,  Guoping Qiu

IPC分类号： G06K9/40

CPC分类号： G06T5/009

摘要： Enhancement of an image includes adjusting its brightness and then adjusting the contrast of the brightness adjusted image. Adjusting the brightness uses an estimation of real world luminance. Contrast adjustment involves extracting background and contrast information, adjusting the contrast information by an adjustment factor based on the background information and combining the background corrected contrast information to obtain an output image.

摘要翻译： 图像的增强包括调整其亮度，然后调节亮度调节图像的对比度。 调整亮度使用真实世界亮度的估计。 对比度调整涉及提取背景和对比度信息，通过基于背景信息的调整因子调整对比度信息并组合背景校正对比度信息以获得输出图像。

公开(公告)号：US20090263037A1

公开(公告)日：2009-10-22

申请号：US12105505

申请日：2008-04-18

申请人： Guoping Qiu ,  Wei Zhang ,  Huajun Peng ,  Min Chen

发明人： Guoping Qiu ,  Wei Zhang ,  Huajun Peng ,  Min Chen

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T2207/20208

摘要： A method of converting an image signal from an original dynamic range to a target dynamic range includes dividing the original dynamic range and the target dynamic range in to a plurality of corresponding sub-ranges and mapping each original sub-range to its corresponding target sub-range. One of the dynamic ranges is divided into a plurality of sub-ranges having equal size and the other dynamic range is divided into the corresponding sub-ranges each having a size based on a characteristic of the corresponding equal size sub-ranges. The invention may be employed in display, capture and image processing apparatus.

摘要翻译： 将图像信号从原始动态范围转换为目标动态范围的方法包括将原始动态范围和目标动态范围划分为多个对应子范围，并将每个原始子范围映射到其相应的目标子范围， 范围。 其中一个动态范围被划分为具有相同大小的多个子范围，另一个动态范围被划分成各自具有基于对应的相等尺寸子范围的特征的尺寸的相应子范围。 本发明可以用于显示，捕获和图像处理装置。

公开(公告)号：US20210319253A1

公开(公告)日：2021-10-14

申请号：US12311715

申请日：2006-10-10

申请人： XIAODONG GU ,  GUOPING QIU ,  ZHIBO CHEN ,  QUQING CHEN ,  CHARLES CHUANMING WANG

发明人： XIAODONG GU ,  GUOPING QIU ,  ZHIBO CHEN ,  QUQING CHEN ,  CHARLES CHUANMING WANG

IPC分类号： G06K9/46 ,  G06K9/00

摘要： The invention relates to a method for generating a saliency map for a picture of a sequence of pictures, the picture being divided in blocks of pixels. The method comprises a step for computing a saliency value for each block of the picture. According to the invention, the saliency value equals the self information of the block, the self information depending on the spatial and temporal contexts of the block.

公开(公告)号：US07639893B2

公开(公告)日：2009-12-29

申请号：US11435545

申请日：2006-05-17

申请人： Jiang Duan ,  Marco Bressan ,  Christopher R. Dance ,  Guoping Qiu

发明人： Jiang Duan ,  Marco Bressan ,  Christopher R. Dance ,  Guoping Qiu

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/007 ,  G06T2207/20012 ,  G06T2207/20208 ,  H04N1/4074 ,  H04N5/20

摘要： A method of automatic mapping of image data includes representing image data for an image as luminance values, determining a key value as a function of an average luminance value of the image and of minimum and maximum luminance values of the image, generating offset-adjusted luminance values including applying an offset to each of the luminance values, the offset being a function of the determined key value, and computing a tone reproduction curve for at least a region of the image which includes applying a mapping function to the offset-adjusted luminance values.

摘要翻译： 图像数据的自动映射的方法包括将图像的图像数据表示为亮度值，确定作为图像的平均亮度值的函数的键值和图像的最小和最大亮度值的函数，生成偏移调整亮度 值，包括对每个亮度值应用偏移，偏移是所确定的键值的函数，以及计算图像的至少一个区域的色调再现曲线，其包括对偏移调整的亮度值应用映射函数 。

公开(公告)号：US20090295705A1

公开(公告)日：2009-12-03

申请号：US12129305

申请日：2008-05-29

申请人： Min CHEN ,  Huajun PENG ,  Guoping QIU ,  Chun Kit HUNG ,  Wei ZHANG

发明人： Min CHEN ,  Huajun PENG ,  Guoping QIU ,  Chun Kit HUNG ,  Wei ZHANG

IPC分类号： G09G3/36

CPC分类号： G09G3/3611 ,  G09G3/3406 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold

摘要翻译： 一种降低由背光装置照亮的液晶显示器中的功耗的方法包括使背光调光并调节图像的强度以补偿暗淡的背光。 用于背光的调光因子基于根据图像信号的像素强度分布确定的剪切点。 基于调光因子调整图像的强度，其中使用第一色调映射函数来调整低于强度阈值的像素强度，并且使用第二色调映射函数来调整高于强度阈值的像素强度

公开(公告)号：US20070269132A1

公开(公告)日：2007-11-22

申请号：US11435545

申请日：2006-05-17

申请人： Jiang Duan ,  Marco Bressan ,  Christopher R. Dance ,  Guoping Qiu

发明人： Jiang Duan ,  Marco Bressan ,  Christopher R. Dance ,  Guoping Qiu

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/007 ,  G06T2207/20012 ,  G06T2207/20208 ,  H04N1/4074 ,  H04N5/20

摘要： A method of automatic mapping of image data includes representing image data for an image as luminance values, determining a key value as a function of an average luminance value of the image and of minimum and maximum luminance values of the image, generating offset-adjusted luminance values including applying an offset to each of the luminance values, the offset being a function of the determined key value, and computing a tone reproduction curve for at least a region of the image which includes applying a mapping function to the offset-adjusted luminance values.

摘要翻译： 图像数据的自动映射的方法包括将图像的图像数据表示为亮度值，确定作为图像的平均亮度值的函数的键值和图像的最小和最大亮度值的函数，生成偏移调整亮度 值，包括对每个亮度值应用偏移，偏移是所确定的键值的函数，以及计算图像的至少一个区域的色调再现曲线，其包括对偏移调整的亮度值应用映射函数 。