Write a research on visibility restoration for nighttime hazy image 1. Write code to analyze the characteristics of foggy images at night in terms of histogram distribution, color rendering and contrast and so on 2. Implementation of pre-processing algorithms such as denoising, illumination compensation, and color correction of foggy images at night 3. Dehaze the pre-processed image to achieve high clarity 4. Perform subjective and objective evaluation of the cleared image, and calculate its objective evaluation index Document with 10000 words or so , the repetition rate is less than 20%, write code to achieve the above requirements, MATLAB、 C or any other program language is OK.