摘要
图像非均匀量化存在边界确定和细节限制等问题,为此提出的压扩量化算法的基本思想是先通过非线性变换将不均匀图像变换到均匀域来均匀量化,然后将量化结果反变换成不均匀图像。该文提出了一种直方图锥形拉伸增强算法,将图像压扩量化中的纵向非均匀分层思想延伸为图像直方图灰度轴的横向非均匀拉伸,以获得图像整体对比度的提高。
The uneven quantization of the image has such problem as boundaries detection and details limitation, so the idea of pressing-extending quantization is presented. Firstly the image is transformed into the even field to quantitate equably by non-linear transformation, and then the result after quantization is transformed against into the uneven image. This paper presents an image enhancement algorithm based on cone-shaped extending of the histogram, which spreads the uneven lengthways bedding idea of image pressing-extending quantization into the transverse uneven extending of the image histogram to make the holistic contrast advance.
出处
《计算机工程》
CAS
CSCD
北大核心
2004年第16期153-154,共2页
Computer Engineering
关键词
直方图
锥形拉伸
图像增强
算法
Histogram
Core-shaped extending
Image enhancement
Algorithm
