Color image reversible digital watermarking method based on three-dimensional prediction error histogram

A color image and prediction error technology, applied in image data processing, image data processing, instruments, etc.

Active Publication Date: 2016-07-13
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a color image reversible digital watermarking method based on a three-dimensional prediction error histogram, aiming at solving the problem that the traditiona

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  • Color image reversible digital watermarking method based on three-dimensional prediction error histogram
  • Color image reversible digital watermarking method based on three-dimensional prediction error histogram
  • Color image reversible digital watermarking method based on three-dimensional prediction error histogram

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[0070] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0071] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0072] Such as figure 1 As shown, the color image reversible digital watermarking method based on the three-dimensional prediction error histogram of the embodiment of the present invention includes the following steps:

[0073] S101: Separate the original color image according to the color channels, adjust the pixels (except the first row of pixels) of the three grayscale images equal to the boundary value (0 or 255) to a reasonable range, and construct three corresponding bitmaps, ...

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Abstract

The invention discloses a color image reversible digital watermarking method based on a three-dimensional prediction error histogram. The method comprises steps: a watermark is embedded and extracted; through changing a prediction error group mapping relationship in the three-dimensional prediction error histogram, mapping with large embedding distortion is abandoned, mapping is divided into mapping whose embedding distortion is no more than 2 and mapping whose embedding distortion is no more than 1, and a reversible watermark is embedded in a new mapping relationship rebuilding method. Distortion of the image can be avoided to a certain degree, and the PSNR of the image is improved. The method can be used for hiding of secret information; and through applying a double-layer embedding scheme based on a diamond prediction model and building the prediction error group mapping relationship different from the previous one, less image distortion under the same embedding capacity can be realized.

Description

technical field [0001] The invention belongs to the technical field of digital watermarking, in particular to a color image reversible digital watermarking method based on a three-dimensional prediction error histogram. Background technique [0002] In recent years, in the fields of military, medical, remote sensing image processing and other fields, scholars have analyzed and studied the original image, and proposed a reversible watermarking technology by adjusting the information of the human eye to the insensitive area in the image. After extracting the watermark, the original image can be restored without error. The current research on reversible digital watermarking mainly focuses on grayscale images, and only a few research results are related to color images. [0003] However, in real life, more color images are encountered, and the traditional three-dimensional prediction error histogram reversible digital watermarking algorithm does not make full use of the redunda...

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0092G06T2201/0203
Inventor 王祥张彩裴庆祺
Owner XIDIAN UNIV
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