Watermarking citra digital dengan penanda berupa gambar --

Development of increasingly modern tecnology as otis today, especilly for processing on digital images, it is necesary. For pendulums, data manipulation data from digital imagery, this is certainly infringing the copyright of data owner. One of the ways used to defend the copyright of the owner is to insert secret data known as watermarking technigue,therefore in this final project. Watermarking digital image with piture-folder tags. In this final process the method used is. (DCT) is a tecnique of insertion of confidential data by trsnforming the image of the spatial domain into the frequency domain. By adding a key (key) to improve security. The results obtained after the watermarking process can run and work properly. The insertion results are then tested using PSNR to measure the ratio between the maximum price between the signal and noise of an image, as measured in decibels (dB). The bigger the PSNR the smaller the noise. From the result of this study obtained watermarking results PSNR output 60 dB.