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.
海面背景下海面及连绵起伏的波浪反光使图像的信噪比和对比度都较低，而且舰船目标像素较少。
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;
本发明涉及一种可调对比度目标源，该目标源的目标在目标积分球与背景积分球之间；
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