Digital image interesting region visible watermarik adding method suitable for internet

Abstract

The invention provides a digital image interesting region visible watermarik adding method suitable for internet, which comprises the steps of: acquiring the original image of a watermark to be added,a watermark image and the initial point to be embeded of the watermark image in the original image, and acquiring the RGB images of the original imalge and the watermark image; converting the original image and the watermark image form the RGB images to an HIS space, and acquiring the grayscale images of the original image and the watermark image; adjusting the size of the watermark image to thesize matched with the interesting region of the original image, and calculating the variance between the grayscale image of the interesting region of the original image and the grayscale image of thewatermark image by blocking; embedding the grayscale image of the watermark image into the grayscale image of the original image starting from the initial point to be embedded of the original image according to the variance; and restoring the original image embedded into the watermark from the grayscale image to the RGH image. The method can add watermark at the interesting region of the originalimage (such as the face and eyebrow of people), and has small influence on color image quality, and the added watermark is clear and visible.

Description

technical field [0001] The invention relates to a method for adding digital watermarks to image data. Background technique [0002] With the deepening of the application of digital technology and Internet technology, various digital media are published and disseminated through the Internet, and legal disputes arising from network intellectual property infringement issues frequently occur, and the copyright protection and information integrity assurance of multimedia digital works are gradually become an important issue that urgently needs to be resolved. [0003] A prerequisite for solving the above-mentioned problems is the authentication problem of multimedia digital works. Traditionally, digital works have generally been protected using cryptography. Although encryption technology can better protect the content in transmission, it cannot solve the protection problem when the information is received and decrypted. The basic idea of ​​digital watermarking is to embed inf...

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Problems solved by technology

[0006] There are also some media producers who hope to use the Internet to sell their media works. They embed the works with visible watermarks and then put them on the webpage for publicity. Users can directly download the works with watermarks, but if users are interested in the original works, due to the watermark Difficult to remove, so must be purchased from the owner for a fee

[0007] The current digital watermarking method, such as the DCT algorithm-based digital image watermark embedding method disclosed in the Chinese invention patent application publication specification CN101504758A, has high computational complexity and is not suitable for realization on the Internet; The image is embedded as a watermark in the image, and it does not support the embedded watermark in the region of interest, which is also an important deficiency of the invention

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