In the process of obtaining the medicine diagnosis character of spine centrum, the approach of image pre-processing and detecting the geometry character of centrum has been taken.

本文对脊柱椎体骨骼医学诊断特征提取的过程，采取了先对图像进行预处理，再提取椎体几何特征的步骤。

youdao

Based on the "three-ball" measurement theory and the machine vision technology, a novel instrument for measuring taper thread is introduced. At the same time, image pre-process technology is analyzed.

前言： 基于螺纹测量“三针法”的原理，使用机器视觉的方式，研制开发了三维自动锥螺纹检测系统本体，对图像处理技术中的预处理部分做了简单探讨。

youdao

When a transaction containing DML on a tracked table commits, this process stores the pre-image of the rows into the Flashback Data Archive.

当在被追踪的表上面发生了dml事务的时候，这个进程存储行的前镜像到闪回数据归档里面。

youdao