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Our experiments on the proposed content based watermarking algorithm are based on gray scale images.The cover image used is “Lena” and watermark used is“Rice” the scaling factor is set according to content andquality of watermark image. The greater the scaling factorbetter is the watermark detection however reducing theoverall quality of image. Here host image and watermark image both are of size256 x 256 and the Peak Signal to Noise Ratio is found outto be “21.5818”. The correlation factor gives therelationship between original watermark and extractedwatermark. For random relationship it “0” and for linearrelationship is “1”. We found the correlation to be “1” asthe image is not expose to any attacks, such ascompression, noise, filtering etc.
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