Importance

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Abstract

A digital watermarking system capable of making a digital watermark even in an input image of few colors. An image input section inputs an object image in which a digital watermark is to be made and transforms or develops the image into digital data of the format of the system. In a texture database section, texture patterns in each of which the digital watermark is previously made are registered. And in a color conversion table section, information for coordinating original colors used in the input image with the textures is registered. An image composing section creates a watermarked image in which the original colors of the input image are replaced with the textures of the texture database as designated in the color conversion table. An image output section retains the watermarked image to be outputted from the image composing section and outputs the watermarked image.

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First Claim