The area of image is calculated by using edge tracing and vector analysis in this paper. The result is available in analysing practical biomedical and metallurgical images.

Considering the characteristics of SLM microscopic images and color information of them, two wavelet transformation based methods in HSI color space and vector space for edge detection are proposed.

It also introduces the application of reverse approach, transition of data format and figure vector technique of ct image in process of edge intensifying.