Abstract
The process of recognizing the processed patterns makes the pattern data useful for the computer. It plays a significant role in the field of pattern recognition and computer vision. So, the image capture is an inaccurate process in terms of the distance from the object. Therefore, the image capturing for object from the inside of a moved vehicle, for example, will lead to a change in the distance between the object and the vehicle for each captured image and finally a change in the size of the object image size inside the image. Viewing that the techniques of chain coding are considered the most used in presenting. Therefore, this study has recognized the patterns inside the image by using the chain coding .In the paper, the most important problems that the application of recognizing patterns by using the chain coding and the methods of solving them have been presented .The chain coding has been applied on the images of the regulated and the unregulated geometrical patterns .The problem of changing size has been solved by a suggested method and this method has proved to be of high efficiency in recognizing the patterns of various sizes .Also, the method has proved a higher efficiency compared with Rehman to process the size changing in which the chain coding is used.
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