Remote-sensing image perceptual hash authentication method based on Gabor filter bank and DWT converting

A filter bank and perceptual hash technology, applied in the field of geographic information security, can solve the problem that the Hash function is too sensitive to data changes

Inactive Publication Date: 2015-06-17
NANJING NORMAL UNIVERSITY
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Problems solved by technology

The Hash function is too sensitive to data changes, and has great limitations when applied to the authentication of remote sensing images.

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  • Remote-sensing image perceptual hash authentication method based on Gabor filter bank and DWT converting
  • Remote-sensing image perceptual hash authentication method based on Gabor filter bank and DWT converting
  • Remote-sensing image perceptual hash authentication method based on Gabor filter bank and DWT converting

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Embodiment Construction

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] The present invention utilizes the Gabor filter to enhance the important role of image features and edge features in the utilization of remote sensing images in different directions and frequencies. First, the parameters of the Gabor filter are determined through the information entropy of each grid area of ​​the image based on an adaptive strategy, and then The corresponding image area is filtered, edge features are extracted by DWT transformation, compressed and denoised by PCA method, and image-aware hash series are generated.

[0021] like figure 2 , this embodiment selects a 2500×2500 3-band Tiff format remote sensing image as experimental data, and performs content-based integrity authentication according to the present invention. An embodiment of the present invention is given and the present invention is further described in deta...

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Abstract

The invention discloses a remote-sensing image perceptual hash authentication method based on a Gabor filter bank and DWT converting. Through the feature that a Gabor filter can enhance an image in different directions under different frequencies and the great effect of edge features in remote-sensing image using, a remote-sensing image is subjected to grid dividing first, then based on a self-adaptation strategy, the parameters of the Gabor filter bank are determined in a self-adaptation mode according to the information entropy of a grid unit, then the edge features of the grid unit are extracted and compressed by DWT converting and a PCA method, and finally the perceptual hash of the image is generated; an by comparing the normalization Hamming distance between image perceptual hash sequences, an authentication process of the remote-sensing image is achieved. Authentication based on content of the remote-sensing image is achieved, remote-sensing image local tampering can be effectively detected, robustness is achieved on image operation with content unchanged is achieved, and powerful safety guarantee is provided for effective using of the remote-sensing image.

Description

technical field [0001] The invention belongs to the field of geographic information security, and in particular relates to a remote sensing image perception hash authentication method based on Gabor filter bank and DWT transform (discrete wavelet transform). The edge features of different regions are compressed by the PCA (Principal Component Analysis) method to generate a perceptual hash sequence of the image. At the authentication end, the content-based integrity authentication of remote sensing images is realized by matching between perceptual hash sequences. Background technique [0002] Remote sensing images, as an important carrier for obtaining information on the surface environment, resources and other geoscience topics, are vulnerable to various intentional or unintentional "tampering" in the process of transmission and use. The traditional authentication technology is mainly based on the cryptographic Hash function to realize data authentication. Hash function is...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 朱长青丁凯孟任娜
Owner NANJING NORMAL UNIVERSITY
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