subtraction of image的意思|示意

A new cross template was applied to the problem of image registration in digital subtraction angiography.

提出一种基于十字模板的数字减影图像配准快速算法。

Two methods of initial estimates are proposed: (1) using real time image subtraction scheme and a micro motion compensation mechanism to take zero constantly as initial estimates;

对相关迭代算法中的初值估计问题进行了研究，提出两种初值估计方法：（1 ）利用“实时相减”和“精密调节”相结合的方法而获得零初值；

In order to overcome the lack of sensitivity of light change, combining the adaptive background subtraction with the symmetrical differencing obtains the integrity foreground image.

为了克服了减背景法对光照变化敏感的不足，再结合帧差法对运动目标进行检测。

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 quality of the subtraction image was improved and computation time was reduced by selecting edge pixels as triangular control points.

通过计算图像梯度信息，选取边缘区域像素作为控制点，既改善减影图像质量，又提高运算速度。

On the basis of two kinds of image models in color space, shadows of objects have been detected by background subtraction approach.

在应用两种彩色空间模型的基础上，用背景差分法对阴影进行了检测。