Method and system for copyright protection of image data

A copyright protection and image data technology, applied in image data processing, image data processing, program/content distribution protection, etc., can solve the problems that image algorithms cannot resist multiple attacks at the same time, cropping, rotation and scaling geometric attacks, etc.

Active Publication Date: 2019-04-05
武汉圆周率软件科技有限公司 +1
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AI Technical Summary

Problems solved by technology

[0004] At present, the image algorithm cannot resist multiple attacks at the same time, especially the problems of cropping, rotation and scaling geometric attacks

Method used

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  • Method and system for copyright protection of image data
  • Method and system for copyright protection of image data
  • Method and system for copyright protection of image data

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Embodiment Construction

[0133] The present invention of the embodiment of the present invention is an image map watermarking method based on image features and wavelet transform, and at the same time estimates image deformation through a straight line template in Fourier transform domain. Using this method, a copyright protection system for remote sensing image map data based on digital watermarking technology has been developed and realized. The system can add and extract watermarks to common map image file formats such as img, geotiff, tiff, bmp, jpg, png, etc. The development environment is vs2005, and the remote sensing image library gdal and the computer vision library OpenCV are used to realize it. The present invention will be further described in detail in conjunction with the system below.

[0134] According to the technical principle of the method of the present invention, do following restriction to the image map file that can add and extract watermark:

[0135] 1. The present invention ...

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Abstract

The invention provides a copyright protection method of image data. Character information comprising copyright information is encoded to an image sequence formed by combining a limited number of binary image templates, and through combination with image feature points and a wavelet transformation technology, the binary image sequence is embedded into an image. For the purpose of fending off rotation and zoom attacks, preset template linear points are embedded into a circular ring Fourier transformation area of SIFT feature points of the image. During extraction, through analyzing distribution of the template linear points, rotation and zoom deformation parameters applied to the image are estimated, the image is restored by use of the parameters, and then the extraction is performed, through matching watermark binary images obtained through the extraction with preset template images, a watermark character sequence is restored according to an encoding algorithm. The algorithm has quite high robustness and solves the problem of incapability of simultaneously fending off multiple attacks especially cutting and rotation zoom geometric attacks by use of a conventional image algorithm.

Description

technical field [0001] The invention relates to the technical field of geographic information copyright protection, in particular to a method for copyright protection of image data. Background technique [0002] Image data, as a geographic base map, is an important basic resource. The collection, storage, editing, and processing of image data requires a lot of manpower, material and financial resources, so data theft, illegal copying, and other infringements are prone to occur. Not long after Google launched the online electronic map service, many tool software for downloading Google electronic map image data appeared on the Internet, and the image data can be obtained easily. Regularly and visibly embedded in the published electronic map image data to swear copyright. It can be seen that the image data must be processed by certain copyright protection technical means before it can be publicly released. The above solution to protect the copyright of image data is simple an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06F21/16
CPCG06F21/16G06T1/005
Inventor 郭丙轩柯俊胡志刚王铁程
Owner 武汉圆周率软件科技有限公司
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