A method for information hiding in high dynamic range images

Abstract

The invention discloses a high dynamic range image information hiding method, which acquires three channel values ​​of each pixel in the original high dynamic range image during the embedding of hidden information; and then according to each channel value of each pixel and the corresponding 5-bit exponent to determine the effective position of the information to be embedded in each channel value of each pixel; and then embed information in each channel value of each pixel to obtain a high dynamic range embedded with hidden information image; in the extraction of hidden information, obtain the three channel values ​​of each pixel in the high dynamic range image embedded with hidden information; then get the embedding position of information in each channel value embedded with information of each pixel ; Then extract the information from each channel value embedded with information of each pixel, and extract the secret information sequence; the advantage is that the secret information can be embedded in the high dynamic range image of the OpenEXR format. When the embedding rate is 30 Images with hidden information embedded in pixels can still be highly fidelity.

Description

technical field [0001] The invention relates to an image information hiding technology, in particular to a high dynamic range image information hiding method. Background technique [0002] In the field of image processing, dynamic range refers to the logarithm of the ratio of the maximum and minimum luminosity in a digital image. The dynamic range of the real scene is up to 9 orders of magnitude, but the existing low dynamic range (Low dynamic range, LDR) image uses 8bits / color / pixel to store data, and part of the scene information is lost. High dynamic range (High dynamic range, HDR) imaging technology makes up for this deficiency. It uses floating-point data to accurately display the brightness range of real scenes. Imaging and other aspects are increasingly concerned and used. [0003] Information hiding is the use of digital media to hide important information. In recent years, the information hiding technology of low dynamic range images has developed rapidly, but th...

AI Technical Summary

Problems solved by technology

The existing high dynamic range image information hiding algorithms can be divided into two categories. The first category sacrifices image quality for a higher embedding rate. The embedding rate of the existing top algorithms is only higher than 5 bits per pixel (5bpps). ; The second type can achieve lossless embedding of information, but the embedding rate is lower than 0.2 bits per pixel (0.2bpp)

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