Image duel scrambling method based on three-dimensional Logistic mapping

Abstract

An image duel scrambling method based on three-dimensional Logistic mapping belongs to the field of digital image processing. The image positive scrambling process comprises the steps that firstly an IMAGE to be scrambled with the size of M*N is obtained, 5*M*N three-dimensional Logistic mapping function values are respectively obtained according to a three-dimensional Logistic mapping formula, the Logistic function values of last M first dimensions, last N second dimensions, and last M*N third dimensions of the 5*M*N three-dimensional Logistic mapping function values are obtained and sorted in an ascending mode respectively, and position sequences of an index 1, an index 2 and an index 3 are obtained; pixel position scrambling is conducted on the IMAGE by utilizing the sequences of the index 1 and the index 2, and an Image is obtained and converted into a single-dimensional image; an xor operation is conducted on the image and a result obtained through a reminder operation of the index 3 and 255, an image pixel value is changed to obtain an image fig, and the size of the fig is converted into the size of the IMAGE to obtain an image FIG which is a scrambling image. According to the image duel scrambling method based on three-dimensional Logistic mapping, the function value sequences of the three-dimensional Logistic mapping are utilized to respectively change the pixel position and the pixel value of the scrambling image, dual scrambling to the image is achieved, and the image duel scrambling method has the advantages of being high in generality and good in safety.

Description

technical field [0001] The invention relates to an image double reset scrambling method for three-dimensional Logistic mapping, is an information hiding preprocessing method and an image encryption means, and belongs to the field of digital image processing. Background technique [0002] In recent years, with the development of social science and technology and information technology, digital information is being transmitted quickly and conveniently in various forms on the network, and digital images have overcome the difficulties caused by the large storage capacity in the past, and have gradually become a An important carrier of information exchange. But in real life, most of the image information is required to be kept secret, so the security and confidentiality of the image information has gradually been paid close attention to by people. Therefore, digital image scrambling technology has developed rapidly and has been widely used. Over the years, scholars have studied ...

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Problems solved by technology

[0003] The existing two types of scrambling methods have been proposed by researchers one after another, and each has its own advantages and disadvantages, but there are few methods that combine these two types of scrambling methods, and the combination of the two can cover the shortcomings of the two. A method with high security, so it is quite challenging to study a dual reset scrambling method with high security and good applicability

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