Method and device for compressing and expanding image intended for encrypted communication, program, and storage medium

一种图像压缩、加密通信的技术，应用在图像通信、编码/译码装置、数字视频信号修改等方向，能够解决数据无法做成数据包、图像变化、无法彩色图像使用等问题

Active Publication Date: 2016-08-03
LIGHTRON INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the time of transmission, the encrypted part is a graphic image that is difficult to decipher, so leakage can be strongly avoided, but on the other hand, there is a problem that image changes due to random numbers of bits tend to occur during transmission , the problem that it cannot be used for the transmission of color images, the problem that the data cannot be made into packets and cannot be used for Internet communication, the problem that it is not always a continuous transmission method, and the problem that it needs to be printed once and the operation is complicated.

Method used

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  • Method and device for compressing and expanding image intended for encrypted communication, program, and storage medium
  • Method and device for compressing and expanding image intended for encrypted communication, program, and storage medium
  • Method and device for compressing and expanding image intended for encrypted communication, program, and storage medium

Examples

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Embodiment 1

[0113] Embodiment 1 is an encrypted image communication system 45 capable of performing encrypted image communication by configuring an image compression / expansion device 28 for encrypted communication according to the present invention in a computer 42 and a computer 44 on the Internet 43 through a third program 36 . On the other hand, the second aspect of the image compression and expansion device 28 for encrypted communication constituted by the fourth program 37 and a part of the constituent units is different from the image compression and expansion device 28 for encrypted communication constituted by the third program 36 The first way has no difference in performance and operation. Therefore, as a representative image compression / expansion device 28 for encrypted communication, the first mode of the image compression / expansion device 28 for encrypted communication constituted by the third program 36 is selected in the first embodiment.

[0114] Figure 18 An example of ...

Embodiment 2

[0125] Embodiment 2 is an improved encrypted image communication system 72 that speeds up by making a part of the configuration of the encrypted image communication system 45 hardware-based and further allowing a server to undertake part of the calculations.

[0126] Figure 20 An example of the configuration of the improved encrypted image communication system 72 is illustrated. exist Figure 20 Among them, the computer 42 and the computer 44 are respectively connected to the servers 74 to 77 on the Internet 43 via a LAN module with a LAN terminal and a VPN router, and the servers 74 to 77 are connected to the Internet 43 via the VPN router. The computer 42, the computer 44, and the servers 74 to 77 have FFT / IFFT (FirstFourierTransfer / InverseFirstFourierTransfer; Fast Fourier Transform / Inverse Fast Fourier Transform) circuit boards made of FPGAs for calculating Fourier transform and inverse Fourier transform, respectively. The FFT / IFFT circuit board performs calculations of...

Embodiment 3

[0136] Embodiment 3 is an encrypted communication monitoring camera system 78 to which a high-speed improved encrypted image communication system 85 that speeds up the improved encrypted image communication system 72 for video is applied.

[0137] The high-speed improved encrypted image communication system 85 changes the FFT / IFFT circuit substrates of the computer 42, the computer 44 and the servers 74 to 77 into a DCT / IDCT (DiscreteCosineTransform / InverseDiscreteCosineTransform; Discrete Cosine Transform / Inverse Discrete Cosine Transform) circuit substrate, and further converts The image restoration calculation unit W48H is changed to the second form W49H of the image restoration calculation unit obtained by hardening the second form W49 of the image restoration calculation unit using an FPGA. In this way, the amount of calculation in the Fourier transform unit and the inverse Fourier transform unit is halved, and the amount of calculation required for image restoration calcu...

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Abstract

The present invention addresses the problem of providing a method and device that solve the problem of the inability to compress and transmit a digital image without a loss while encrypting the image, to expand the image on the reception side, and to restore the digital image in an artifact-free state. The present invention also addresses the problem of providing a program and a storage medium therefor. An image or video is encrypted by subjecting an encryption key image to discrete convolution, thereby obscuring the image or video beyond recognition. The image or video is further entropy-encoded and losslessly compressed for transmission over the Internet. After being expanded on the reception side, the pre-encryption image is decrypted by performing iterative calculation on the basis of the Bayes probability formula using the separately delivered encryption key image.

Description

technical field [0001] The present invention relates to an encrypted image for encryption-oriented communication, based on encrypting a digital image with a key image and further reversibly compressing it and then expanding it on the receiving side, and an additionally transmitted key image, through Bayesian (Bayse) probability Encrypted communication-oriented image compression and expansion device and its method for restoring an image by performing iterative calculation according to the theoretical method, first to second programs for making a computer execute an encrypted communication-oriented image compression and expansion method, and used to form an encrypted communication-oriented image compression and expansion method The unit of the image compression and expansion device for communication, the third to fourth programs executed by the computer, and the first to fourth storage media that independently encrypt and store the first to fourth programs are connected to the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09C5/00H04N19/59H04N21/2347H04N21/4405
CPCG09C5/00H04N19/59H04N19/91H04N21/2347H04N21/4405H04N19/426H04N21/4356
Inventor 江口满男
Owner LIGHTRON INT
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