According to the characteristics of the underwater image, the bottom layer can be divided into four steps: image denoising, image enhancement, edge detection and edge extraction.
根据水下图像的特点，其底层处理过程分为：图像去噪，图像增强，边缘检测，和边缘提取。
2
In the field of the image registration based on the characteristics, image understanding and pattern recognition and so on, the corner extraction is of great significance.
在基于特征的图像配准、图像理解及模式识别等领域中，角点提取具有十分重要的意义。
3
By the research of the nature and imagecharacteristics of BEMD, improved BEMD method will be applied to image edge extraction and denoising.