City picture information authentication method based on streetscape

Abstract

The invention belongs to the technical filed of image authentication and detection and relates to a city picture information authentication method based on streetscape. The city picture information authentication method comprises the following steps of: extracting EXIF (Exchangeable Image File) attribute information of an original picture; positioning the geographical position of the original picture according to the extracted EXIF attribute information and extracting one streetscape picture at the position every a certain azimuth in a streetscape view of the corresponding geographical position; carrying out content matching on the original picture with the searched streetscape picture by adopting an SIFT (Scale Invariant Feature Transform) two-way matching method based on the characteristic of scale invariance; and carrying out image information authentication according to the matching result and judging the truth of EXIF longitude and latitude information of the original picture. The city picture information authentication method has the beneficial effects that the method adopted by the invention is simple and is easy to realize; whether the image information is tampered or not can be validated by means of the external existing image resources; and the matching precision is higher.

Description

technical field [0001] The invention belongs to the technical field of image forensics and detection, and relates to an image authentication method. Background technique [0002] With the widespread use of various image processing equipment and image editing software, ordinary users can perform various editing operations on images. However, the convenience of digital media editing makes it easy for malicious attackers to tamper or forge it, which may cause extremely serious economic and political problems (such as being nominated by the Democratic Party for the party on July 29, 2004). John Kerry, a candidate for the 2004 U.S. presidential election, was deeply influenced by photos circulated online of him and famous American movie star Jane Fonda attending an anti-war protest against Vietnam - an event that never took place. )loss. Therefore, digital image authentication has become a hot topic of research at home and abroad. It mainly solves the problem of distinguishing ...

AI Technical Summary

Problems solved by technology

Although this strategy reduces the influence of most geometric and photometric transformations, it has the disadvantage of sacrificing many correct feature points

Some improved methods such as spectral techniques, which are based on pairwise constraints, improve the accuracy of matching, but ignore the number of correct matches

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