image filter的用法和样例：
例句
- Thus, it is imperative that image filter kernels be optimized for execution in the lowest possible number of processor cycles.
于是，重要的是，图像滤波器内核必须被优化，从而在尽可能少的处理器周期内完成。 - Since a video stream is really an image sequence moving at a specified rate, image filters need to operate fast enough to keep up with the succession of input images.
既然一个视频流事实上是一路以特定速率移动的图像序列，图像滤波器需要以足够快的速度运行，以跟上图像连续不断的输入。
