中文摘要：

针对非线性校正存在着的计算精度和速度的矛盾,依据数字图像处理点运算的直方图均衡化算法,建立一种基于查表法的非线性失真测量方法。该算法通过软件实现,首先将一幅均衡化图像通过非线性系统,根据输入、输出图像直方图得到非线性系统灰度变换函数及其反函数,进一步建立灰度转换表;再根据灰度转换表,还原原始图像,实现非线性系统校正。实验结果表明,算法具有精度高和运算速度快的特点,对校正非线性失真引起的灰度变化有较高的有效性。

英文摘要：

For the contradiction between the calculation accuracy and speed in the processing of non-linear correction,based on the histogram equalization algorithm in digital image processing point-computing,this paper establishes a nonlinear distortion measurement method based on a look-up table to achieve non-linear system correction.This algorithm achieved through software implementation.First put an equalization image through the non-linear system,according to the input and output image histogram to get the non-linear system gray-scale transformation function and its inverse function,and further establish the gray scale conversion tables;Then according to gray scale conversion tables,restore the original image achieve nonlinear system correction.Experimental results show that the algorithm has a high accuracy and a fast computing speed,and the changes in gray caused by the correction of non-linear distortion have a high effectiveness.