An image-quality guaranteed method for quantization-based watermarking using a DWT

This paper proposes a quantization-based watermarking method that generates watermarked images of a desired image-quality independently of the characteristics of the original images. To guarantee the image-quality, this method utilizes the relationship between a transformed domain and the spatial domain for the signal energy. The proposed method extracts an embedded watermark sequence from a watermarked image without referring to any original images.