DIGITAL WATERMARK EMBEDDING METHOD AND DIGITAL WATERMARK DETECTION METHOD

摘要

A digital watermark embedding system generates a watermarked image by providing one or more specific regions in an image, each specific region including two or more base regions symmetric with respect to the centroid, and by embedding a watermark in the image while avoiding the specific region. Further, a digital watermark detecting system detects a watermark in a region other than the specific region, by detecting the shape of the specific region in which no watermark is embedded, calculating the centroid position of the specific region as a centroid, and correcting geometric transformation of the image based on the location in the image that corresponds to one or more calculated centroids.

主权项

1. A digital watermark embedding method in a computer including a disk, a memory, and an input/output device, to generate a watermarked image,
wherein the digital watermark embedding method comprising: inputting an image; and providing one or more specific regions in the image, each specific region including two or more base regions that are point symmetric with respect to the centroid, and embedding a watermark in the image while avoiding the specific region.