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Image manipulation detection method based on single view measurement

A forgery detection, single-view technology, applied in the field of image processing, can solve problems such as objects that cannot be detected

Inactive Publication Date: 2010-03-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only be applied to a certain plane, such as a wall or a ground, etc.
Objects not attached to these planes cannot be detected

Method used

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  • Image manipulation detection method based on single view measurement
  • Image manipulation detection method based on single view measurement
  • Image manipulation detection method based on single view measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 1. Find the horizontal vanishing line l ∞ and H P

[0086] Find two sets of parallel lines in any direction on the image, and find their intersection points respectively. The line connecting the two intersection points is the vanishing line l ∞ , and then get H P . Such as Figure 8 (b), select two sets of parallel lines in the intersection network line, because the disappearing line is located far away, it is not marked in the figure.

[0087] 2. Find H A

[0088] Find the ratio of a known angle to a known line segment length on the image, you can get two circles on the α-β plane, find their intersection point, you can solve H A . Such as Figure 8 (c), the right line (the two right-angled sides of the intersection mesh line) marks a 90° angle, the left line (the two sides of the sewer iron cover) marks a length ratio, the sewer iron cover The aspect ratio is about 8:5.

[0089] 3. Calculate two vanishing points v that are perpendicular to each other x , v ...

Embodiment 2

[0098] 1. Find two mutually perpendicular vanishing points v x , v y and vanishing line l ∞

[0099] Find two sets of parallel lines that are perpendicular to each other from the image, and the intersection point of a set of parallel lines is v x , the intersection point of the other group is v y , the line connecting the two intersection points is l ∞ . Such as Figure 9 (b), select the four sides at the top of the Beiyang University Hall as two sets of parallel lines, and the uppermost horizontal line is the obtained vanishing line.

[0100] 2. Calculate f, ω, and then calculate v z

[0101] According to the fourth step in (5), f and ω can be obtained, and then by the formula l ∞ =ωv z solve v z .

[0102] 3. Mark the endpoints of the reference object and the target object

[0103] Such as Figure 9 (c), the left vertical line marks the reference object with a height of 340cm, the right vertical line marks the target object, the head end is marked with "○", and...

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Abstract

The invention belongs to image processing technology, and relates to an image manipulation detection method based on single view measurement. The method comprises the steps of: finding out a horizontal vanishing line 1 infinity and two vanishing points vx and vy which are vertical to each other for a given image; manually labeling two end points of a reference object and a target object on the image; calculating the height of the target object; and judging whether the target object is a manipulated area by judging whether the height is reliable, or in an accepted range or not. The method can realize the authenticity verification of a digital media (digital image or video) by utilizing little geometric information.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a digital image authenticity identification method. Background technique [0002] Under the background of the rapid development of digital network and multimedia technology, the function of image processing software is becoming more and more powerful, and the operation is becoming more and more simple. Counterfeiters can add important information to an image without leaving obvious traces to achieve forgery and tampering of the image. Digital image tampering and forgery, such as being used in official media, scientific discoveries and court evidence, will have an important impact on political and social stability. Therefore, it is of great significance to carry out digital image forensics research on digital image tampering to ensure public trust and order, fight crime, maintain judicial justice and news integrity. [0003] Digital image forgery detection technology main...

Claims

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Application Information

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IPC IPC(8): G06T7/00G01B11/02
Inventor 操晓春朱淑义武琳孙美君
Owner TIANJIN UNIV
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