Sar and Optical Image Fusion for Coastal Surveillance

Coastal surveillance has long been paid a lot of attention for the threat of flooding due to some natural phenomena, such as global warming. Prompt and accurate reaction to the visualization of the flooded areas is the key. An image fusion rule is thus proposed in this paper to achieve image enhancement of the flooded areas. The rule, targeted at high-frequency parts of the synthetic aperture radar (SAR) and optical images, is able to exploit and combine the merits of both SAR and optical images to obtain the exact flooded areas with the clear boundaries. Experimental results validate the performance of the proposed fusion rule and show that not only the clarity of fusion images is improved, but also the texture and brightness contrast are greatly enhanced.