其结果是软的，均衡的光线以最小的眩光和视觉舒适的空间，减少视觉疲劳。
The result is soft, balanced light with minimal glare and visually comfortable Spaces that reduce visual fatigue.
第三步，为了减轻光线不均匀对灰度图像造成的影响，对产品图像进行灰度直方图均衡；
Third, the gray-level histogram of image is equalized in order to reduce the influence of uneven light to the gray-level image.
其目的，是使照在主体上的闪光灯输出光线恰与落在背景上的环境光线相均衡。
The intent is to output just enough power from the flash to make the flash light falling on the main subject match or balance the ambient light falling on the background.
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