International Journal of Computer Information Systems, Vol. 3, No. 4, 2011 Abstract— Digital watermarking is the process of inserting a digital signal of a defined pattern into digital data. This is used to identify the owner of the work, to authenticate the content, to trace illegal copies of the work and other similar purposes. This paper provides new techniques of hiding color watermark into color image. The analysis of this technique is taken in term of different value of power of noise of Gaussian Noise. This paper shows how different color watermark hide in color image in spatial domain perform for different values noise. This technique shows visible watermarking scheme. Index Terms— Digital Watermark, SNR, White Gaussian Noise, Spatial Domain I. INTRODUCTION HE watermark is a signal embedded into the host media to be protected, such as an image or audio or video. It contains useful certifiable information for the owner of the host media, such as producer's name, company logo, etc; the watermark can be detected or extracted later to make an assertion about the host media. There are two important properties of a watermark; the first is that the watermark embedding should not alter the quality and visually of the host image and it should be perceptually invisible. The second property is robustness with respect to image distortions. This means that the watermark is difficult for an attacker to remove and it should be also robust to common image processing and geometric operations, such as filtering, resizing, cropping and image compression [1, 4]. II. COLOR IMAGE WATERMARKING In our scheme, a different color watermark image is used as the original watermark W of size pixels 512*512, 256*256 and128*128 which is shown in fig. 1. In order to construct a Rohit M Thanki is an Assistant Professor at EC Department of Institute of Computer and Communication Technology for Women, New Vallabh Vidyanagar, Gujarat, India (email: rohitthanki9@gmail.com) Rahul K Kher is an Associate Professor at EC Department of G H Patel College of Engineering & Technology, Vallabh Vidyanagar, Gujarat, India (email: rahul2777@yahoo.com) Divyang D Vyas is an Associate Professor and Head of EC Department at Darshan Institute of Technology & Engineering, Rajkot, Gujarat, India (email: vyasdd@yahoo.com) good watermark for embedding, the original watermark is permuted to obtain a White Gaussian Noise signal, which uncorrelated to the original watermark. Fig. 1 Different color watermark A. The algorithm of the embed color watermark into the Color Cover Image:  Set the value of Power of Noise.  Read and determine size of cover image.  Read and determine size of watermark image. Resize the watermark image into the cover image.  Generate the White Gaussian Noise signal using value of power of noise and size of cover image.  Add the color cover image with multiple of WGN signal and watermark image using below equation: ) _ ) , , ( ( ) , , ( ) , , ( signal WGN r y x w r y x I r y x I w    ) _ ) , , ( ( ) , , ( ) , , ( signal WGN g y x w g y x I g y x I w    ) _ ) , , ( ( ) , , ( ) , , ( signal WGN b y x w b y x I b y x I w    A New Watermarking Scheme for Hiding Color Watermark in Presence of WGN in Spatial Domain Rohit M Thanki, Rahul K Kher, Divyang D Vyas T October Issue Page 134 of 152 ISSN 2229 5208