Arnold The origin of the name is a transformation called Arnold's predecessors made the initial conversion is the picture of a cat, also called cat face
Transformation, the mapping position of each pixel can be replaced with the image, that is by transformation of a point on the original pixel image to another point
On (the pixel value is not changed, but the location has changed !!!)
In the processing of the two-dimensional image that is, the change of the formula:
Note here that a picture size N (also implies that the image must be square, equal length and width), while varying the value of the determinant 1 matrix satisfies the foregoing
1 it is called to meet the cat face change, and this change has periodicity, such as a 2X2 image cycle is 3:
If you met the Founder of the picture we can not be expanded to fill, so that it is square picture, then after a certain transformation, we can set the original picture
Chaos into a fuzzy picture, if we want to restore the original picture can be multiplied by the inverse of a matrix:
Encrypted image
Decrypted image
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