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    • 1. 发明授权
    • Systems and methods for performing edge enhancement in digital images
    • 用于在数字图像中执行边缘增强的系统和方法
    • US08983187B2
    • 2015-03-17
    • US13788789
    • 2013-03-07
    • Cyberlink Corp.
    • Chih-Yu Cheng
    • G06K9/00G06T5/00
    • G06T5/00G06T5/004G06T2207/10024G06T2207/20192G06T2207/20224
    • A system for editing a digital image comprises a low pass filter for receiving a source image and for filtering high spatial frequency components of the source image to generate a smoothed image. An arithmetic operator unit subtracts color values of the smoothed image from color values of the source image to produce a first image value on pixel-by-pixel basis. A gradient reversal analyzer compares gradient values of the smoothed image to gradient values of the source image and generates a control signal. A boost controller generates a new value for each pixel of a boost parameter map according to the control signal. The boost controller applies the boost parameter map to modify the first image value to generate a second image value. The arithmetic operator unit is further configured to generate an edge enhanced image according to color values of the source image and the second image value.
    • 用于编辑数字图像的系统包括用于接收源图像的低通滤波器,以及用于滤波源图像的高空间频率分量以产生平滑图像。 算术运算器单元从源图像的颜色值中减去平滑图像的颜色值,以逐个像素为基础产生第一图像值。 梯度反转分析仪将平滑图像的梯度值与源图像的梯度值进行比较,并生成控制信号。 升压控制器根据控制信号为升压参数图的每个像素生成一个新值。 升压控制器应用升压参数图来修改第一图像值以产生第二图像值。 算术运算器单元还被配置为根据源图像和第二图像值的颜色值生成边缘增强图像。
    • 2. 发明申请
    • Systems and Methods for Performing Edge Enhancement in Digital Images
    • 在数字图像中执行边缘增强的系统和方法
    • US20140254930A1
    • 2014-09-11
    • US13788789
    • 2013-03-07
    • CYBERLINK CORP.
    • Chih-Yu Cheng
    • G06T5/00
    • G06T5/00G06T5/004G06T2207/10024G06T2207/20192G06T2207/20224
    • A system for editing a digital image comprises a low pass filter for receiving a source image and for filtering high spatial frequency components of the source image to generate a smoothed image. An arithmetic operator unit subtracts color values of the smoothed image from color values of the source image to produce a first image value on pixel-by-pixel basis. A gradient reversal analyzer compares gradient values of the smoothed image to gradient values of the source image and generates a control signal. A boost controller generates a new value for each pixel of a boost parameter map according to the control signal. The boost controller applies the boost parameter map to modify the first image value to generate a second image value. The arithmetic operator unit is further configured to generate an edge enhanced image according to color values of the source image and the second image value.
    • 用于编辑数字图像的系统包括用于接收源图像的低通滤波器,以及用于滤波源图像的高空间频率分量以产生平滑图像。 算术运算器单元从源图像的颜色值中减去平滑图像的颜色值,以逐个像素为基础产生第一图像值。 梯度反转分析仪将平滑图像的梯度值与源图像的梯度值进行比较,并生成控制信号。 升压控制器根据控制信号为升压参数图的每个像素生成一个新值。 升压控制器应用升压参数图来修改第一图像值以产生第二图像值。 算术运算器单元还被配置为根据源图像和第二图像值的颜色值生成边缘增强图像。
    • 4. 发明授权
    • Systems and methods for performing region-based local contrast enhancement
    • 用于执行基于区域的局部对比度增强的系统和方法
    • US08885105B1
    • 2014-11-11
    • US14148891
    • 2014-01-07
    • Cyberlink Corp.
    • Chih-Yu ChengYu-En Lin
    • H04N9/64G06K9/00H04N9/79G11B27/031G06T5/00
    • G06T5/008G06T5/40G06T2207/10016G06T2207/10024G06T2207/20012G06T2207/20021
    • Local contrast enhancement comprises obtaining a first frame as a reference frame and a second frame as a current frame. The reference frame is partitioned into a plurality of reference regions, and a first color mapping function is derived for at least one of the reference regions in the reference frame according to the corresponding color distribution. The first color mapping function comprises, for at least one of a predetermined set of colors, a first source color value and a first contrast-enhanced color value. The current frame is partitioned into a plurality of regions, and a second color mapping function is derived for at least one of the regions in the current frame according to the first color mapping functions of at least two of the reference regions in the reference frame. The second color mapping function is applied to generate a contrast-enhanced frame.
    • 局部对比度增强包括获得作为参考帧的第一帧和作为当前帧的第二帧。 参考帧被划分为多个参考区域,并且根据相应的颜色分布为参考帧中的至少一个参考区域导出第一颜色映射函数。 对于预定颜色组中的至少一个,第一颜色映射功能包括第一源颜色值和第一对比度增强颜色值。 当前帧被划分成多个区域,并且根据参考帧中的至少两个参考区域的第一颜色映射函数,为当前帧中的至少一个区域导出第二颜色映射函数。 应用第二颜色映射功能来生成对比度增强的帧。