System and method for the detection of a circle image for pattern recognition

摘要: The present invention generally relates to pattern recognition systems, and particularly the detection of a circle from complex image that combines circles, straight lines, other shapes. system determines whether pixel in an being scanned is edge pixel, derives gradient vector associated with pixel. direction modified toward center incorporating then determined. If coordinates for are calculated, stored memory. After above steps repeated pixels scanned, calculated any same pixels. so, considered be detected based on having centers within predetermined range each frequency occurrence.