| This paper introduces a new method to zoom in a image by doing asymmetrically interpolation. By doing so, the high frequency information of the image can be reserved as more as possible, which can be controlled by the switch value.Firstly, this paper discussed the main method mainly used in image zooming-in and the problems to be faced in this domain. Secondly, on the base of the analysis of those methods, the strength of the method is reserved, and the weakness is avoided. A new method is introduced. Then the arithmetic and flow chart for program-developing is described in detail. Finally, the experiment results are given.
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