Device and method for embedding watermark into image

摘要

A method of embedding a binary watermark into an image and a computer applied such are disclosed. The binary watermark is transformed to a watermark sequence consisting of K binary numbers and the image is converted into a grayscale image, being segmented into several sections. K sections are selected randomly while each selected section corresponds to one of the binary numbers of the watermark sequence. In relation to each selected section, a sum of a first part of the pixels and a sum of a second part of the pixels is compared. Each of the selected sections having their result of comparison being made to correspond to corresponding binary number in accordance with a predefined correlation results in the binary watermark being embedded into the image.

主权项

1. A method of embedding binary watermark pixels into an image, the watermark has K pixels, the method comprising the steps of:
obtaining a watermark sequence consisting of K binary numbers; converting the image into a grayscale image; segmenting the grayscale image into a plurality of equal sections; selecting K sections randomly, wherein each selected section corresponds to one of the K binary numbers of the watermark sequence; comparing a sum of a first part of the pixels of each selected section and a sum of a second part of the pixels of each selected section to obtain a comparison result of each selected section; determining if the comparison result of each selected section corresponds to the corresponding one of the K binary number in accordance with a predefined correlation; and adjusting the pixels of the section if the comparison result of the section does not correspond to the corresponding binary number in accordance with the predefined correlation.