Subtraction image的意思|示意

This article proposes a pretreatment algorithm based on image registration and digital subtraction.

论文提出了一种利用图像配准和数字差影的快速预处理算法。

In digital subtraction angiography, registration techniques were frequently used to reduce motion artifact in subtracted image because of patient motion.

在数字减影血管造影中，常要用配准技术来消除因病人运动而形成的减影图像中的运动伪影。

The key of background subtraction is to extract and update the background image adaptively in changeable road environment affected by all kinds of factors such as weather and illumination condition.

由于实际交通道路状况受气候、光照等多种因素的影响，变化非常复杂，因此如何设计一种自适应的背景提取与更新算法以适应实际环境的变化，是背景差法的关键所在。

The algorithm can quickly and precisely mark the moving object and its trail by functions of image enhancement, morphological operation, and interframe background subtraction.

该算法运用图像增强、形态学操作、图像差分法，能快速准确标注出移动的物体及其移动轨迹。

Conclusion Digital subtraction MRI is an effective and simple post-processing technique, which is also time-saving and reliable with high image quality.

结论MR数字减影技术是一种简便易行而有效的图像后处理方法，而且省时、可靠和成像质量高。

With a phase grating located at Fourier frequency plane, optical image subtraction is obtained as a result of the coherent superposition of the zeroth and the first order of the diffracted light.

置一位相光栅于相干光学处理系统频谱平面，利用其零级与一级衍射光的相干迭加实现图象相减。