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A Method of Image Restoration in Ciphertext Domain

A repair method and technology in the ciphertext domain are applied in the field of image repairing in the ciphertext domain to achieve the effects of good image repairing effect, strong privacy and broad application prospects.

Active Publication Date: 2021-10-01
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is made to solve the problem of how to restore encrypted images in the ciphertext domain, and the purpose is to provide a method for image restoration in the ciphertext domain

Method used

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  • A Method of Image Restoration in Ciphertext Domain
  • A Method of Image Restoration in Ciphertext Domain
  • A Method of Image Restoration in Ciphertext Domain

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following embodiments will specifically illustrate the ciphertext domain image restoration method of the present invention in conjunction with the accompanying drawings.

[0019] The image restorer (such as a cloud server with strong computing power) follows the encrypted image E to be repaired according to the ciphertext domain image restoration method involved in this embodiment P Before repairing in the ciphertext domain, it is necessary to obtain the encrypted image E to be repaired from the image owner P , Auxiliary encrypted image E J and the mask image θ.

[0020] The image owner holds the damaged image I d and the mask image θ. Among them, the mask image θ is based on the damaged image I d The result is used to mark the damaged image I d images of damaged and intact areas. Since the image owner wants the image restorer to res...

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Abstract

The present invention provides an image restoration method in the ciphertext domain, which is used to restore the damaged image generated by the damage of the mask image in the ciphertext domain. Repair encrypted image E P , auxiliary encrypted image E J And the mask image θ; step 2, through the mask image θ to be repaired the encrypted image E P Mark the damaged area Ω and the intact area Φ; step 3, calculate the priority of the pixel c to be repaired in the damaged area Ω in block units to obtain the target block with the highest priority Step 4, in the auxiliary encrypted image E J with the assistance of the target block and all candidate blocks B of the intact region Φ S Perform block matching to get the best matching block Step 5, use the best matching block to repair the target block and select the initial repaired encrypted image E P1 ; Step 6, respectively to the auxiliary encrypted image E J , the damaged area Ω and the intact area Φ are updated; step 7, repeat steps 2 to 6 until all damaged areas Ω are repaired to obtain the repaired encrypted image E' P .

Description

technical field [0001] The invention relates to an image restoration method, in particular to a ciphertext domain image restoration method. Background technique [0002] Image inpainting techniques are used in many application fields. Such as removing unwanted objects or regions, filling in missing parts of an image, is also widely used in computer vision, including image restoration, compression, editing, and merging. Image inpainting techniques have also been extended to image-related applications, for example, compositing videos and animations. The current image inpainting techniques are mainly divided into three categories: methods based on interpolation (such as: FMM algorithm), methods based on partial differential equations (such as: TV algorithm), and methods based on samples / blocks (such as: Criminisi algorithm). [0003] Today, with the development of the Internet, cloud storage and computing have become common. Due to limited storage space and computing power, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T5/10G06F21/60
CPCG06F21/602G06T5/10G06T5/00
Inventor 孙佳忆秦川
Owner UNIV OF SHANGHAI FOR SCI & TECH
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