明暗扫描(用光源强度的变化进行) brightness scanning 黑白信号，亮度信号 brightness signal 亮度传输特性，亮度转移特性 brightness transfer characteristic ..
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brightness constant scanning 亮度恒定扫描
The scanning converter supplies two communicative ways:RS-422 and RS-232. Through these ways the main controlling system controls the brightness, contrast, saturation of output pictures.
为了便于丰控系统控制扫描转换器的输出图像的亮度、对比度和色饱和度，扫描转换器提供了RS-422和RS-232两种通信方式。
There is no echo signal, but brightness, scanning line are still exists.
没有回波，但亮度、扫描线均正常。
In most of cases, the laser scanning confocal microscopy images, such as fluorescence stained biomedical nuclei, are blurred and have a wide range of brightness and poor intensity homogeneity.
共焦显微图象如荧光染色细胞核图象，往往是一种比较模糊的图象，并且亮度范围大，灰度均匀度也较差。
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