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Seam-carving image positioning evidence obtaining method for object deletion

A technology of image positioning and seam cutting, which is used in instruments, character and pattern recognition, computer parts and other directions, and can solve problems such as positioning and detection of object deletion areas.

Active Publication Date: 2017-09-08
TIANJIN POLYTECHNIC UNIV
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  • Claims
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Problems solved by technology

[0019] However, the existing methods are mainly aimed at the image detection of seam cropping and zooming. There is no research on the tampering detection of specific object removal using seam cropping, let alone the location detection of the object deletion area.

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  • Seam-carving image positioning evidence obtaining method for object deletion
  • Seam-carving image positioning evidence obtaining method for object deletion
  • Seam-carving image positioning evidence obtaining method for object deletion

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Embodiment Construction

[0085] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0086] The present invention proposes a new seam-cut positioning detection method for object deletion through the behavioral feature of pixel displacement in the seam-cut image of object deletion. The present invention is based on the fact that when an image is deleted by seam cutting, the pixels in the area L on the left side of the deleted object do not shift; However, the specific moving step of a certain pixel is uncertain and irregular; the area R on the right side of the deleted object moves to the left before and after seam cutting, and the overall moving step is the same. For the specific object deletion process, the M area is relatively concentrated, and there are two funnel-shaped structures connected in pairs, the L area is on the left, and the R area is on the right. The division of the three areas is more obvious (such as figure 1 shown). For the common...

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Abstract

The invention provides a seam-carving image positioning evidence obtaining method for object deletion and belongs to the field of image blind evidence obtaining in image processing. The seam-carving image positioning evidence obtaining method for object deletion comprises the steps of (1), carrying out block effect grid extraction on a to-be-detected image, thereby obtaining a block effect grid diagram G of the to-be-detected image; (2), carrying out feature extraction on the block effect grid diagram G, thereby obtaining features; (3), classifying the features through utilization of an unsupervised clustering method, thereby obtaining a classification mark result diagram; and (4), carrying out positioning detection the classification mark result diagram. Through application of the method provided by the invention, whether an object in the image is deleted or not can be detected, and the specific position of the deleted object can be positioned.

Description

technical field [0001] The invention belongs to the field of image blind forensics in image processing, and in particular relates to a seam-cutting image positioning and forensics method for object deletion. Background technique [0002] Seam-Carving is a content-aware image scaling technology. This technology can not only realize the zoom of the image, but also realize the removal of specific objects. When seam cutting is used to remove a specific object, the deleted area must be marked first, then the energy value of the area is assigned to 0, and finally a seam with the lowest energy is continuously deleted until all marked areas are deleted. This method makes it possible to remove objects without distorting and distorting the image. [0003] A seam is defined as an 8-connected low-energy pixel line running through the image from top to bottom or left to right. Dynamic programming techniques can be used to select the optimal seam in each direction, and the so-called op...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06K9/46G06K9/62
CPCG06V10/25G06V10/44G06F18/23213
Inventor 柯永振韩蓉杜玲郭景
Owner TIANJIN POLYTECHNIC UNIV
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