Integration of ultrasonic and vision sensors for 3-D underwater scene analysis

A method for calibrating ultrasound and video sensors in the hostile underwater environment is presented. It yields sufficient accuracy to allow transformation of image data in one sensor's image plane to the baseframe, and from there into the other sensor's image plane, a prerequisite for any form of sensor fusion. The feasibility of automatic segmentation of underwater video scenes in combination with sparse ultrasound data has been demonstrated by experiment.<
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