公开(公告)号：US09582866B2

公开(公告)日：2017-02-28

申请号：US14643205

申请日：2015-03-10

申请人： VIA TECHNOLOGIES, INC.

发明人： De-Wei Shen ,  Sheng-Che Tsao

IPC分类号： G06K9/40 ,  G06T5/00 ,  G06T5/40

CPC分类号： G06T5/009 ,  G06T5/40 ,  G06T7/90 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20008 ,  G06T2207/20021 ,  G06T2207/20076 ,  G06T2207/20208 ,  G06T2210/36

摘要： An adaptive contrast enhancement method, the steps include: calculating a probability density function based on pixel values of a plurality of pixels of an input image signal; dividing the plurality of pixels into one of a plurality of low-brightness sets and high-brightness sets according to the pixel values of the plurality of pixels, wherein a part of the plurality of pixels with pixel values below one of a plurality of delimiting values are allocated to the low-brightness set and a part of the plurality of pixels with pixel values above the delimiting value are allocated to the high-brightness set; determining a mapping function according to the probability of the plurality of pixels in the low-brightness set and the probability of the plurality of pixels in the high-brightness set; and mapping the input image signal to an output image signal according to the mapping function.

摘要翻译： 一种自适应对比度增强方法，所述步骤包括：基于输入图像信号的多个像素的像素值来计算概率密度函数; 根据所述多个像素的像素值将所述多个像素分割为多个低亮度组和高亮度组中的一个，其中所述多个像素的一部分具有低于多个限定值中的一个的像素值 被分配给低亮度组，并且具有高于界定值的像素值的多个像素的一部分被分配给高亮度组; 根据所述低亮度组中的所述多个像素的概率和所述高亮度组中的所述多个像素的概率来确定映射函数; 并根据映射函数将输入图像信号映射到输出图像信号。