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A Color Image Watermarking Method Based on Compressed Sensing Identification Based on Human Visual Characteristics

A compressed sensing and human vision technology, applied in the field of image processing, can solve the problems of low algorithm difficulty, easy to be cracked, and insufficient security level, and achieve the effect of shortening the key, improving security, and convenient management.

Active Publication Date: 2022-06-17
陕西云宝影视文化传播有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a color image watermarking method based on the human visual characteristics of compressed sensing identification, which solves the problems of insufficient security level, low algorithm difficulty and easy cracking in the prior art

Method used

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  • A Color Image Watermarking Method Based on Compressed Sensing Identification Based on Human Visual Characteristics
  • A Color Image Watermarking Method Based on Compressed Sensing Identification Based on Human Visual Characteristics
  • A Color Image Watermarking Method Based on Compressed Sensing Identification Based on Human Visual Characteristics

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Embodiment

[0066] Select two images from the USC-SIPI image database, use the grayscale image "boat" of 512 × 512 pixels as the host image, and use the color image "Lena" of 256 × 256 pixels as the color watermark image, such as Figure 4a and Figure 4b shown.

[0067] Figure 4a is the original host image "boat"; Figure 4b is the color watermark image "Lena"; for Logistic mapping, the control parameter p is set to 3.99995, and the initial value x 0 with y 0 Set to 0.35 and 0.45, respectively. For simplicity, the rotation angle of the GT is set to the same value, that is, α=β=0.32. The actual weighting factor used for fusion between the host image and the color watermarked image is set to 1.0e -5 . The compression ratio of the columns is set to C=0.75, which makes the measurement matrix Has 192×256 pixels. The size of the significant block is considered to be 32 × 32 pixels to obtain the reference image.

[0068] refer to figure 2 , image 3 , the concrete steps of the em...

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Abstract

The color image watermarking method of the present invention based on the compressed sensing mark of human visual characteristics, the steps include: 1) dividing the grayscale image used as the host image into non-overlapping blocks, sorting based on human visual feature values, selecting important blocks to formulate Reference image; 2) decompose the color watermarked image into three components, and compress it with compressed sensing and a measurement matrix generated based on Logistic mapping; 3) Combine the compressed component images to form a grayscale watermarked image, which is generated using another Logistic mapping The chaotic random phase mask modulates the grayscale watermark image, which is transformed by GT; 4) The frequency coefficient obtained from the watermark image is fused with another frequency data obtained by applying GT to the reference image, and the inverse GT is used to transform the fusion result ; 5) The inverse transform result is segmented again, where the modified important blocks are mapped to their original positions to obtain the watermarked image.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a color image watermarking method based on the compressive perception identification of human visual characteristics. Background technique [0002] In recent years, image encryption has received widespread attention in various fields, and optical-based processing technology has high security for image encryption. First, optical systems can provide many degrees of freedom, such as wavelength, focal length, and distance between lenses; second, they have inherent capabilities such as parallel processing and fast computational speed in various applications; in addition, DRPE-based optical processing techniques can expand into different fields. [0003] Currently, in most optical encryption schemes, pure images are encoded into noise-like ciphertext images. These noise-like images often contain obvious visual signs, which can attract the attention of crackers when they realize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 隋连升王佳豪周贝
Owner 陕西云宝影视文化传播有限公司
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