Abstract The quantization error plays an important role in the field of image processing and computer vision. The relation between the error of line fitting and the line characters, especially the slope of the straight lines, is mainly analyzed. After a simple introduction of the line fitting, the definition of the sensitive space of straight lines is given, and its expression under different conditions is presented and proved. The emulational experiments suggest there is a close relation between the sensitive space and the error of fitting results. The error of intercept is carefully researched as the error of slope is much less than that of intercept. A method to evaluate intercept is presented. The experimental result shows the proposed method outperforms the traditional one.
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2006, Vol. 19 
