Edge detection is an essential step in image analysis and recognition, and it is an important technology in the image preprocessing procedure.
边缘检测是图像分析识别必不可少的环节，是一种重要的图像预处理技术。
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.
通过对边界的跟踪与矢量分析，实现了对面积的计算。实际用于生物医学、金相等图像分析，结果表明该方法可行。
The third part USES wavelet analysis and Mathematical Morphology to detect the image edge, and contrasts the two results, we have gotten respective apply condition and good or evil.
第三部分分别使用小波分析和数学形态学进行了数字图象边缘检测，并将两者的检测结果进行了对比，得出了各自的适应条件和优劣之处。
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