Variance Based Block Selective Digital Image Watermarking Scheme

With the increasing use of internet and major development in technology, transmission of digital media is being affected by a large number of illegal interventions. As a valuable solution to this, watermarking provides a secure way for channelizing the digital media (image, audio or video). Digital Watermarking is a method of embedding data (watermark) into a host image without degrading its original quality. This paper presents Digital Image Watermarking in Spatial Domain by finding the Mean and Variance of host image and using the well-known method of Least Significant Bit (LSB) to embed the watermark in a secure position. The experimental results analyze the strength of proposed watermarking algorithm against attacks like Salt and Pepper noise and Gaussian noise. KeywordsLeast Significant Bit (LSB), Salt and Pepper Noise, Spatial Domain, Variance, Watermarking