A novel algorithm of digital image scrambling and encryption based on magic cube transformation;

In addition,a novel magic cube mutation strategy,inspired by the magic cube transformation,is employed to accelerate evolution speed after each iteration.

This algorithm uses the chaotic sequences created by discrete standard map which initial values and parameters are given to improve magic cube transformation, then, uses the new magic cube transformation to do permutation transforms on image, and performs XOR operation circularly by chain type on gray value of pixels and chaotic sequence.

Automatic resolving algorithm and realization of magic cube based on OpenGL;

Because there is strong time and frequency coupling between the interference and useful signal,so twice square transformation is put forward in this paper to separate the interference and useful signal in freque.

The mexthod of square transformation to obtain the intersection points of two conical sections that are of the common axis of symmetry is discussed.

While designing orientation filter,the square-circle transform to rotate filter is introduced,thus computing complexity is reduced and imported errors is avoided.