subtracting

That subtracts nothing from his merit.

那丝毫没有减损他的功绩。

In order to detect and track dim-point targets under the complex background of sky, a high speed method is put, which uses multiwindow, little yardstick, repetitious subtracting and fusing images.

针天空背景下弱点目标的检测与跟踪,提出了一种利用多窗口、尺度、次差融合点目标图像的快速检测与跟踪方法。