background contrast ratio

基本解释

The targets SNR(Signal Noise Ratio)and contrast are very low when the target is in the sea background in which there are sea waves and the reflexing light from the stretch welter.
海麪背景下海麪及連緜起伏的波浪反光使圖像的信噪比和對比度都較低，而且艦船目標像素較少。
The invention relates to a target source with adjustable contrast ratio. The target of the target source is arranged between target integrating sphere and background integrating sphere;
本發明涉及一種可調對比度目標源，該目標源的目標在目標積分球與背景積分球之間；
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