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paper gives the idea of the method digital image watermarking algorithm which is new popular topic for research. The Discrete wavelet is the tool used for digital image watermarking. Wavelet transform has been applied widely in watermarking research as its excellent multi- resolution analysis property. The watermark logo is embedded based on the frequency coefficients of the discrete wavelet transform. The detailed wavelet coefficients of high frequency band of the host image are altered by the watermark logo. The algorithm has been tested for different types of host images under the presence of attacks like Jpeg compression, bit planer reduction, cropping, warping etc. The watermark logo is added in the host image in frequency domain which gets spread over the whole part of the host image in time domain. The existing system is robust to provide the security.

High Frequency Component based Addition Algorithm of Digital Image Watermarking