The problem of gray scale image matchng based on absolute difference magnanimity is discussed.
讨论了基于绝对差度量的灰阶图像识别问题；
Detail is abundant in MRI image and the trifle difference in the gray scale denotes different structure.
磁共振图像细节丰富，且灰度变化细微的区域也反映了不同组织。
By a proper permutation of such pulses, the final reflectance of even difference could be obtained for gray scale display applications.
通过这种脉冲的适当排列，可得到用于灰度显示的最终等差反射。
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