Introduction - If you have any usage issues, please Google them yourself
DCT transform of this program written in C language. The full name of the DCT DCT transform is discrete cosine transform (Discrete Cosine the Transform), refers to a set of intensity data into frequency data, in order to know the intensity change of circumstances. Do high-frequency data modification, and then back to the original form of data, it is clear there are some differences with the original data, but the human eye is not easily recognizable