Browse 77,300+ under the sea background stock illustrations and vector graphics available royalty-free, or search for under the sea background vector to find more great stock images and vector art.

Browse 51,900+ deep sea background stock videos and clips available to use in your projects, or start a new search to explore more stock footage and b-roll video clips. Sharks swim in a circle. A ...

For IR images with sea-air backgrounds, reflections on surface waves increase background thermal noise that might occlude or alter small objects, complicating their detection. Additionally, clouds and ...

Abstract: Weak target detection based on fractal analysis under rada sea clutter background is an open problem. The existing methods, using single fractal dimension and Hurst exponent in time domain ...