水下图象 underwater image
水下图象传输 Underwater image transmission
集束光水下图像系统 underwater imaging system with distributive light of central power
下水曲线图 launching curves
地下水绘图 Groundwater Mapping
地下水位图 water table map ; Map water-table
下水图纸 launching drawings
地下水污染图件编制 Drawing Groundwater Contamination
水下部分侧视图 underwater profile
水下地形图 underwater relief map
由于激光照射下的水下图像含有大量的散斑噪声，严重影响图像的质量。
To recognize underwater target, extraction must be performed well because there is a lot of speckle noise in underwater laser images.
因此，水下图像的预处理与分析技术将在未来海洋工程中占有重要地位。
Hence, preprocessing and analysis technology of underwater images is seized of important status in future ocean engineering.
本论文的主要工作就是在图像预处理的过程中充分利用水下图像的熵信息。
The main work of the thesis is that the entropy information is widely used in the pre-processing of underwater image.
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