气象计量自动化温度检定系统中的图像预处理研究  

Meteorological Measurement Automatic Temperature Testing System in the Research of Image Preprocessing

作　　者：张佳佳[1] 孟宪罗[1] 蒋涛[1] 刘宇[1] 

机构地区：[1]河北省气象技术装备中心,河北石家庄050021

出　　处：《图学学报》2015年第3期352-355,共4页Journal of Graphics

摘　　要：针对气象计量自动化温度检定系统中图像噪声大、对比度不够等问题,在采用图像预处理技术的基础上,提出一种同态滤波的对比度受限自适应图像预处理方法。尝试中值滤波对红外图像进行去噪,保证噪声不被增强的前提下,利用同态滤波的原理,对图像细节进行增强。但同态滤波依然存在图像特征点与非特征点在图像质量不高的情况下容易混淆的问题,对此采用限制对比度自适应直方图均衡的方法进一步调整图像的动态范围。通过仿真实验对此方法进行验证,验证了所提出方法的有效性。Automation temperature calibration system based on meteorological measurement issues such as big noise, low contrast in the image, homomorphic filtering is proposed for contrast limited adaptive image preprocessing method on the basis of the image preprocessing technology. Try median filter for infrared image denoising, and use the principle of homomorphic filtering to enhance image details based on the premise that the noise would not be enhanced. However feature points and non-feature points are very confusing when the image is very poor quality in the method of homomorphic filtering, so the method of equalling limited contrast adaptive histogram is used to adjust the dynamic range of the image. The simulation results verify the feasibility of the method.

关 键 词：图像预处理 中值滤波 直方图均衡化 同态滤波 自适应 

分 类 号：TN911.73[电子电信—通信与信息系统]