Based on the characteristic of each part, different gray scale transforms are designed to carry out image linear enhancement to get the best visual effect for the interested area.
按照每一部分的特点，设计不同的灰度变换，对图像进行分段线性增强，得到感兴趣目标区的最佳视觉效果。
In this way, people can have many filtering images, then finally made sure the best denoised agricultural product images according to image signal-to-noise (PSNR) and visual effect.
这样可以得到许多滤波图像，然后根据图像信噪比PSNR和视觉效果，最终确定去噪效果最好的农产品图像。
Results: the best imagine edge effect and visual sense definition for red free light picture contrast is 0.87. Grey brume is the second important parameter.
结果：无赤光像反差为0.87时影像边缘效应、视觉清晰度最佳，灰雾为第二位。
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