International Journal of Computer Science Issues
Software copyright piracy can be a worldwide sticky question. This encourages vendors to develop various methods against it. In general, the concept of software includes all kinds of electronic documents. While in particular, this concept includes computer programs. Der-Chyuan et al. proposed a two-phase watermarking scheme to protected images and another scheme for digital image copyright protection. Wei-Huang et al. proposed a copyright protection method for digital image with 1/T rate Forward Error Correction (FEC). Ester et al. propose a new algorithm based on Harr discrete wavelet transform for the grayscale watermarking.