低对比度红外热图像对比度增强技术

The Enhancement Technology of Low Contrast Infrared Image

在对红外热图像对比度进行增强时，常采用基于直方图的图像灰度线性或非线性变换技术，其缺点是易放大噪声。而根据二进小波变换建立红外热图像的梯度矢量图，通过对红外热图像梯度矢量图的变换可以有效地增强图像对比度且能抑制噪声的放大。

?We often use histogram-based technology to enhance the low contrast infrared image,but itwill amplify the noises in the infrared image. In thispaper,we give a method to use the dyadic wavelettransform to get the gradients 0f the image. It canenhance the contrast of the low contrast infraredimage by transforming the gradients of the image.Furthmore,it can control the noises of the infraredimage.