Face recognition system based on the discrete cosine transform;

This paper presents a novel steganographic method in Discrete Cosine Transform(DCT) domain.

It is a new method that calculates vertical second derivative of gravity anomalies based on discrete cosine transform(DCT).

It is a new method that calculate vertical second derivative of gravity anomalies based on discrete cosine transform(DCT).

The Study of a Digital Watermarking Algorithm Based on Chaos in DCT;

A blind digital watermarking algorithm based on DCT;

A Novel Image Watermarking Algorithm in DCT Domain;

Macroblock transform algorithm based on DCT domain video downscale;

A closed loop digital watermarking technique in DCT domain;

Best Estimation of Watermarking Embedding Strength about the Closed Loop Digital Watermarking Based on DCT Domain

Additive Insertion Imperceptual Watermarking Based on Block Classification for DCT-domain;

To improve the video decoding ability on the multimedia processing capability limited terminals, an effective algorithm is proposed to implement the DCT-domain downsampling video decoding.

Based on protect image,a technology of communicating with spread spectrum and arithmetic of digital watermarking is analysed,by spread spectrum for host image and random selected DCT block, show a method that stochastic embedding a few ID with watermarking bits,then made and design a arithmetic on embedding and gathering ID of it,show a set of testing data,or example on it s validity at end.