Embedding method and extracting method of color image

Abstract

The invention relates to an embedding method and an extracting method of a color image. The embedding method comprises the following steps: carrying out lossy compression coding on a color image by adopting a JPEG compression algorithm to generate a watermark bit string; calculating a row identification number of each row of data in the data set according to the watermark embedding key; calculating a data identification number corresponding to the data in the data set according to the numerical value of the data and the row identification number corresponding to the data; determining a watermark bit position according to the watermark embedding parameter, the data identification number and the length of the watermark bit string; determining the bit of the watermark to be embedded in the data according to the watermark embedding parameter and the data identification number; embedding the watermark bit value of the watermark bit position in the watermark bit string into the bit of the watermark to be embedded in the data to obtain data with watermark bit information; and sequentially obtaining all data with watermark bit information, and obtaining a data set with color image watermarks. The method can improve the protection effect of the data copyright.

Description

technical field [0001] The invention relates to the field of big data watermarking, in particular to a color image embedding method and extraction method. Background technique [0002] With the continuous maturity and rapid development of artificial intelligence technology, the long-term accumulated big data from all walks of life has shown huge social and economic value, which has also given birth to the demand for big data transactions. But from the current point of view, domestic big data transactions are still in their infancy, and there is still a lack of an effective method for the protection of big data ownership. [0003] An effective method to protect the ownership of big data is digital watermarking. Digital watermarking is to embed copyright information into the data carrier in a way that is not easily perceived, and the embedding of the watermark will not affect the usability of the data. The current digital watermarking methods include the following: [0004]...

AI Technical Summary

Problems solved by technology

In this method, when the data is attacked to a certain extent, the embedded watermark bit value cannot be extracted correctly

Furthermore, the restored image pixel information has a certain bit error rate, and the copyright protection effect of binary and grayscale image watermarking is poor.

Images