We present a new DCT-based block max-min algorithm for digital watermark embedding in images. Our algorithm uses intra-block bordering upon pixels relations to generate the watermarked image. The features of our method to embed the watermark are: (1) the watermark is perceptually invisible; (2) low loss of relevant informationof the original image; (3) the watermark can be read only by using a secret key; (4) the watermark is robust against translation and area cropping; and (5) retrieval of embedded watermark does not need the original image. We describe the algorithm framework and its performance against translation and area cropping with experiments.
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