color subtraction 彩色减影
The axial ct subtraction angiography with subtraction factor 0.8 and color enhancement technique could keep the ventricles on the background.
而减影系数为0 . 8伪彩色增强彩色轴位CT减影血管成像可以保留脑室等解剖背景。
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。
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