可选择泊松方程图像增强方法，可以通过设置阈值对图像中偏暗的像素点进行增强，同时保证偏亮的像素点不会过度增强，而降低图像的质量。-Optional Poisson equation image enhancement method, you can set the threshold for the pixel dark image enhancement, while ensuring that the brightest pixel migraine without excessive enh