Method for enhancing brightness of low-luminance region of image with constant contrast

The invention relates to the field of image processing, in particular to a method for enhancing brightness of a low-luminance region of an image with constant contrast. Calculation and filtering are carried out to obtain s brightness distribution map of an image and thus a nonlinear mapping function...

Full description

Saved in:
Bibliographic Details
Main Authors CHEN SHUIZHONG, JIANG LIANGWEI
Format Patent
LanguageChinese
English
Published 20.07.2018
Subjects
CALCULATING
COMPUTING
COUNTING
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:The invention relates to the field of image processing, in particular to a method for enhancing brightness of a low-luminance region of an image with constant contrast. Calculation and filtering are carried out to obtain s brightness distribution map of an image and thus a nonlinear mapping function is constructed to carry out gray level stretching on the image. Therefore, the average brightness of the luminance region is improved on the premise that the overall contrast of the image and the total brightness of the high luminance area are kept to be unchanged. 本发明涉及图像处理领域，具体涉及种对比度不变的图像低亮度区域增强亮度的方法。本发明通过计算和滤波得到图像的亮度分布图，从而构造非线性映射函数对图像进行灰度拉伸，能够在保持图像整体对比度和高亮度区域总亮度不变的前提下，提升低亮度区域的平均亮度。
Bibliography:Application Number: CN201810064911