边缘检测是图像处理、模式识别和计算机视觉领域的重要内容.传统边缘检测方法的边缘检测效果一般.为了更好地检测出图像边缘,在传统边缘检测算法分析的基础上,提出了一种基于边缘图像融合的图像边缘检测方法.首先,对原图像进行二进小波分解得到低频子图像,然后分别对原图像和低频子图像采用直方图均衡化进行增强后用Canny算子来进行边缘检测,得到原图像和低频子图像的边缘图像,最后采用一定的融合规则将这两个边缘图像融合在一起,得到一幅完好的边缘图像.实验结果表明,这种边缘检测方法明显优于直接对原图像单独使用Canny算子或基于小波变换的边缘检测方法.%Edge detection is an important part of the image processing, pattern recognition and computer visions. The edge detection results of the traditional image edge detection methods in general. In order to better detect the image edge, presented a method of image edge detection based on edge image fusion on the basis of the analysis of traditional edge detection algorithm. The original image is decomposed by dyadic wavelet get low-frequency sub-image at first. Then the original image and the low-frequency sub-image are enhanced by histogram equalization method, the enhanced original image and the enhanced low-frequency sub-image are detected using Canny operator get edge images. Finally, the two edge images are fused into one complying with relevant rules get an intact edge image. Results show that this method is much better than directly using alone the Canny operator or wavelet transform edge detection method to the original image.
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