There are some basic operations for BMP file.
It can compress 256 color picture.
Open the 24-bit bmp file exp_24.bmp and convert the rgb space to yuv space. Perform histogram equalization on the y-space. Then convert from yuv space to rgb space.
Probability non-zero gray level, the ratio of the maximum probability, minimum probability, and maximum minimum probability in the probability non-zero gray level; the number of gray levels with probability greater than the average probability in the image; the average and variance of the non-zero probability are shown in the following figure:
