Accuracy improvement of cloning area detection
DOI:
https://doi.org/10.15276/opu.3.50.2016.09Keywords:
detection accuracy, falsification of image, falsification detection, cloningAbstract
In the work the modification of a method of detection and localization of regions of the integrity violation in the digital image obtained as a result of cloning is developed. Aim: The aim of the work is to increase the accuracy of detection of integrity violation regions of the digital image by development of modification of a method of detection and localization of cloning regions based on the block oriented approach due to simultaneous use in case of expertize of the image with square, triangular, round blocks and of irregular shape blocks. Materials and Methods: Further development of the block oriented approach to the solution of problem of cloning results detection in digital image is provided. Modification of the method of detection and localization of the cloning regions developed by authors earlier, based on the accounting of closeness of the matrix blocks which is quantitatively evaluated by means of different variants of the metrics assignment is offered. Results: The technique of simultaneous use of square, triangular, round blocks and blocks of irregular shape in case of the expertize of the image based on the block oriented approach is developed. Providing the computational experiment the accuracy increase of determination of integrity violation regions of the digital image when using of the offered modification of the method of detection and localization of fields of cloning in case of simultaneous use in case of expertize of different partitioning types blocks is set: the relative value of the area of the revealed region from real region of a clone increases by 1.6 times in comparison with results of operation of algorithmic implementation of the method taken as a basis.
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References
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