Projection point extraction method

A projection point extraction method for a detection system, the detection system comprising a projector, a projection plane, a receiver, and a processor, the projection point extraction method comprising steps of:

• projecting an original image with plural projection points onto the projection plane by the projector, wherein after the original image is received by the receiver, the original image is transmitted to the processor;
• performing an erosion process on the original image by the processor using a kernel executing an operation program code to generate an erosion image;
• performing an intensity transformation process on the erosion image according to an intensity threshold by the processor executing the operation program code to generate a transformation image;
• performing a reconstruction process on the transformation image according to the original image by the processor executing the operation program code to generate a reconstruction image;
• performing a regional maxima process on the reconstruction image by the processor executing the operation program code to generate a mask map;
• and
• performing an extraction process on the original image according to the mask map by the processor executing the operation program code to generate a projection point extraction result.