公开(公告)号：US08103120B2

公开(公告)日：2012-01-24

申请号：US12234895

申请日：2008-09-22

申请人： Wai Pak Choi ,  Stephen Wai-Yan Lai ,  Wing Chi Stephen Chan

发明人： Wai Pak Choi ,  Stephen Wai-Yan Lai ,  Wing Chi Stephen Chan

IPC分类号： G06K9/40

CPC分类号： G09G3/36 ,  G09G3/3406 ,  G09G2320/0271 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/16

摘要： Methods and apparatuses of contrast enhancement on an image are disclosed. The method performs local shading of fine contrast variations in an image, with particular advantage in tone mapping applications. The amounts of shading are determined by the preferred degree of increased image contrast 810, including compensation for subsequent tone mapping, and the difference between a profile signal 803 and the image signal 801 conditional on the signal profile level being higher than the original image signal level, wherein avoiding boosting of brightness level to obtain contrast enhancement. The profile signal 803 is calculated by the weighted sum of the image signal and the absolute signal variation which is the absolute value of the variation between the brightness of two neighbor pixels. This amount of shading is reduced to zero when the profile signal 803 is lower than the original image signal 801 for avoiding the overshooting problem at sharp edges in an image. Uniform RGB scaling is applied to preserve original color tones.

摘要翻译： 公开了对图像进行对比度增强的方法和装置。 该方法执行图像中精细对比度变化的局部阴影，在色调映射应用中特别有利。 阴影量由增加的图像对比度810的优选程度确定，包括对随后的色调映射的补偿，以及条件信号803与图像​​信号801之间的差异，其信号简档级别高于原始图像信号电平 ，其中避免提高亮度水平以获得对比度增强。 通过图像信号和作为两个相邻像素的亮度之间的变化的绝对值的绝对信号变化的加权和计算分布信号803。 当轮廓信号803低于原始图像信号801时，这个阴影量减少到零，以避免在图像中的尖锐边缘处的过冲问题。 应用均匀的RGB缩放以保留原始色调。

公开(公告)号：US08314779B2

公开(公告)日：2012-11-20

申请号：US12390637

申请日：2009-02-23

申请人： Wing Chi Stephen Chan ,  Wai Pak Choi ,  Wai Kin Cheng ,  Kwok Wah Chu ,  Siu Hong Lui ,  Yao Lu ,  Wai Hon Ng

发明人： Wing Chi Stephen Chan ,  Wai Pak Choi ,  Wai Kin Cheng ,  Kwok Wah Chu ,  Siu Hong Lui ,  Yao Lu ,  Wai Hon Ng

IPC分类号： G06F3/045

CPC分类号： G06F3/044 ,  G06F3/04883 ,  G06F2203/04808

摘要： A controller for detection of touches by a single finger or multiple fingers on a touch panel, the touch panel including a first group of electrodes arranged in a first direction and a second group of electrodes arranged in a second direction, thereby forming a plurality of crossover points. The controller includes: a plurality of signal drivers coupled to the first group of electrodes and configured to excite the first group of electrodes sequentially using a spread spectrum signal; a plurality of signal sensors coupled to the second group of electrodes and configured to detect peaks and troughs of capacitive coupled signals at the second group of electrodes, the detecting being performed simultaneously for the crossover points along a current one of the first group of electrodes that is being excited; and a signal processing device configured to detect the touches on the touch panel and to determine touch positions and touch movements, based on the detected peaks and troughs of the capacitive coupled signals.

摘要翻译： 一种用于在触摸面板上检测单个手指或多个手指触摸的控制器，所述触摸面板包括沿第一方向布置的第一组电极和沿第二方向布置的第二组电极，由此形成多个交叉 积分 所述控制器包括：多个信号驱动器，其耦合到所述第一组电极并且被配置为使用扩频信号顺序地激励所述第一组电极; 多个信号传感器，其耦合到所述第二组电极并且被配置为检测所述第二组电极处的电容耦合信号的峰值和谷值，所述检测同时对于沿着所述第一组电极中的当前电极的交叉点执行， 正在兴奋 以及信号处理装置，被配置为基于检测到的电容耦合信号的峰值和谷来检测触摸面板上的触摸并确定触摸位置和触摸移动。

公开(公告)号：US20090278786A1

公开(公告)日：2009-11-12

申请号：US12116739

申请日：2008-05-07

申请人： Wing Chi Chan ,  Wai Pak Choi ,  Wai-Yan Stephen Lai

发明人： Wing Chi Chan ,  Wai Pak Choi ,  Wai-Yan Stephen Lai

IPC分类号： G09G3/36

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

摘要： A method of adjusting image intensity to compensate backlight dimming in dynamic backlight control, the method including estimating distortion of an image that corresponds to different mapping index values 204 selected from the intensity levels 202 of an image. The estimated distortion of image represents factors including the quantity of pixels 205 that have intensity exceeding a mapping index value 204; and the amount 206 that the intensity of each pixel exceeds the corresponding mapping index value. The method further includes selecting from a plurality of schemes 301 for adjusting image intensity to minimize the estimated distortion obtained from the estimating.

摘要翻译： 一种调整图像强度以补偿动态背光控制中的背光调光的方法，所述方法包括估计对应于从图像的强度级202选择的不同映射索引值204的图像的失真。 图像的估计失真表示包括强度超过映射指标值204的像素205的数量的因素; 以及每个像素的强度超过相应的映射索引值的量206。 该方法还包括从多个方案301中选择用于调整图像强度以最小化从估计获得的估计失真。