Abstract- In this paper, we investigate the problem of choosing the best domain for embedding watermarks in digital still images. During this paper, eight watermarking techniques were implemented and evaluated. Four techniques were selected to represent different approaches of embedding data in spatial domain, three approaches using discrete cosine transform (DCT) domain, and one approach using discrete wavelet transform domain (DWT) domain. The algorithms were chosen to represent a range of computational complexities and implementation structures. The performance of the selected algorithms was evaluated with respect to many perceptibility parameters.