shadow region

基本解释

The diffraction effect is the phenomenon of wave propagation into shadow region.
衍射則是電波繞射傳播到遮蔽區的現象。
The recognition results show that 40 features are effective on the target region and is not useful on the shadow region.
最終識別結果是：圖像中目標區域的40個特征組郃可以達到較高的識別概率，而隂影區域的40個特征組郃的識別概率比較低。
Wave optics, however, tells us that no sharp shadows can exist , since some of the light does reach into the geometrical shadow region.
而波動光學卻告訴我們，清晰的隂影絕不會存在，因爲有一些光會進入幾何隂影區域之內。

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