摘要
根据低照度图像暗、对比度低的特点,提出了一种基于3次样条插值函数的直方图规定化方法,并用其对连铸板坯表面图像进行对比度增强处理。该算法是在直方图规定化的理论基础上,采用3次样条插值函数来拟合原直方图,并以拟合后的函数为规定化函数对原图进行直方图规定化变换。通过试验并与采用高斯函数进行规定化处理后的效果图进行对比分析,验证了该算法的有效性和实用性。
According to the darkness and low contrast of low illumination image, the histogram specification algo-rithm based on 3-spline interpolation was introduced, which was used to obtain image enhancement in continuous casting sheet billet image. Based on the theory of histogram specification algorithm, the original histogram image was fit by 3-spline interpolation, and the histogram specification was transformed using the fitting function. Through the comparative experimental analysis of the improved histogram specification algorithm and the traditional histogram specification algorithm based on Gaussian probability density function （Gaussian PDF）, the effectiveness and practicability of the modified algorithm was certified.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2010年第9期58-62,共5页
Journal of Iron and Steel Research
关键词
奎铸板坯
直方图规定化
3次样条插值函数
高斯概率密度函数
continuous casting slab
histogram specification
3-spline interpolation
Gaussian probability density function
