Research of the Multi-Dimension High-Accuracy Sub-Pixel Subdivision Algorithm Based on TMS320C50

摘要

Based on the analysis on the bottleneck for improving CCD measurement resolving power in the high-accuracy image detection system, sub-pixel subdivision technology is presented. Through comparing the advantage and disadvantage of current subdivision algorithms, we propose a new one-dimension sub-pixel subdivision algorithm called Adaptive Weighing Fitting algorithm in the paper, which is suitable for such image as low contrast, low SNR and complex background. And we implement the real-time algorithm in the high-speed system platform based on TMS320C50. Then a fast two-dimension sub-pixel subdivision algorithm based on correlation feature and direction feature of image border is also discussed for improving the location accuracy of complex border. By many simulation experiments and practical detection in spot, the satisfied subdivision results are obtained.