This paper presents a homogeneity measurement and utilizes it to define and enhance the local contrast, which can pretreat X-ray images effectively without over-enhancement and under-enhancement.

• 本文首先使用了一种用于定义和改变图像局部对比度的相似性测量方法，避免了图像的过增强和欠增强，然后用局部法对X光图像进行畸变校正；