The eye sight principle of the model and control parameters of facula diffusion are expo

In allusion to the traditional contour tracing arithmetic which can only work on binary images and is not able to handle the interlinking phenomena among objects,this paper introduces facula diffusion model based on the principle of human vision,and illustrates its controlling parameters including approximation,closing,length-limiting and hit-rate.

Based on mechanism of human sight,the facula diffusion method is advanced to detect individual cross-sections in the image and takes out the contours of them.

Measurement of thermal displacement of welding points for differental metals by laser speckle photography;

Measuring heating stress of metal material at the welding points by using one beam laser speckle interferometry;

The measurement of metal material welding flaws by method of laser speckle;

Using the white light speckle and ultrasonic C-scanning method, the internal defects of composite laminate are detected, and a GTF- 182 optical patten digital system is used to analysis white speckle plate that had Fourier thansformed.

The rotating aperture method is used in de focused white light speckle photography, and the experimental result is in agreement with the theoretical analysis.