Image fragment restoration method and image fragment restoration device

A restoration method and fragmentation technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of low accuracy and efficiency of JPG image fragmentation restoration technology, and achieve high restoration accuracy, high restoration efficiency, and strong versatility Effect

Active Publication Date: 2012-12-19
XIAMEN MEIYA PICO INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an image fragment recovery method and device, which are used to solve the problem that the accuracy and efficiency of the existing JPG image fragment recovery technology are relatively low

Method used

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  • Image fragment restoration method and image fragment restoration device
  • Image fragment restoration method and image fragment restoration device
  • Image fragment restoration method and image fragment restoration device

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Embodiment Construction

[0044] An embodiment of the present invention provides a method for recovering image fragments, such as figure 1 As shown, the method includes the following steps:

[0045] Step 1: According to the header signature corresponding to the image in the format to be restored, obtain the header fragments of the image with the header signature from the storage medium to be restored and form a set of header fragments H. Obtain the non-head fragment set S of the image on the storage medium;

[0046] Step 2: For each head fragment H in the head fragment set H i , match the next non-head fragment S in the non-head fragment set S j , and the current head fragment H i with its next non-head fragment S j Merging, if the file obtained after merging is a complete image file, then output the image file, otherwise, add the file obtained after merging as a new header fragment into the set of header fragments.

[0047] Since the head of almost all formats of image data will always have its c...

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Abstract

The invention provides an image fragment restoration method. The method includes the steps: 1, acquiring head fragments from a to-be-restored storage medium and forming a head fragment collection according to a head signature corresponding to an image in the format needing to be restored, and simultaneously obtaining a non-head fragment collection of the image from the to-be-restored storage medium; and 2, matching each head fragment in the head fragment collection with a corresponding next non-head fragment in the non-head fragment collection, combining the current head fragment with the next non-head fragment thereof, if a file obtained after combination is a complete image file, outputting the complete image file, and otherwise, adding the file obtained after combination in the head fragment collection to serve as a new head fragment. The image fragment restoration method has the advantages of high restoration accuracy and efficiency, and is applicable to restoration of image fragments in various formats and high in practicality.

Description

technical field [0001] The invention belongs to the technical field of information security and computer application, and in particular relates to a reliability-based image fragment recovery method and device. Background technique [0002] Traditional data recovery relies on the meta-information of the file system, such as file allocation table, directory structure, etc., to restore deleted files, but in many cases, these meta-information may be lost due to overwriting or human operation. Recovery techniques will not recover the files. Therefore, in recent years, a recovery technology that does not rely on the file system and recovers at the file level has emerged, that is, a technology that recovers a specific file from a storage medium by parsing a specific file format. At present, data recovery at the file level is more popular with "head-tail" recovery. The recovery effect of technology is not satisfactory. [0003] With the development of science and technology, it i...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 沈长达钱镜洁林艺滨
Owner XIAMEN MEIYA PICO INFORMATION
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