A survey of DCT based watermarking schemes

In current scenario, the uses of smart phone are increasing exponentially due to the increasing use of social media platforms such as Facebook, Instagram, and YouTube etc. Many users use social media apps to share his/her personal information in the form of images and videos. To protect this personal information, there is a need of secure communication system. This work presents a novel encryption algorithms based on discrete cosine transform (DCT). DCT is one of the popular techniques used in watermarking schemes. With this research, researchers can get a survey of latest watermarking schemes based on DCT that will help various researchers working in this field.