In this paper the watermarking programs based on the discrete cosine transform (DCT) domain DC component (DC) is adopted. Through adjusting the block DCT coefficient of the image the watermarks are hidden. And blocking the selected image accord

ios编程语言参考，适合刚刚接触ios编程的初学者，书是第二版的，请下载时注意版本。-ios programming language reference, just contact ios programming for beginners, is the second edition of the book, please download the version when the note.

按照离散余弦变换的定义编写的C++程序，可以在VC上运行-DCT C++