A simple method using a single video camera to determine the three-dimensional position of a fish

Pereira, Pedro; Oliveira, Rui Filipe

http://hdl.handle.net/10400.12/7339

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Authors

Pereira, Pedro

Oliveira, Rui Filipe

Abstract(s)

In the present paper, we describe a method for recording the coordinates of a fish in an aquarium in a three-dimensional space, using a single video camera and a mirror. Weuse photogrammetic equations for this, considering the image obtained in the mirror as a virtual image obtained by a second camera. Atransformation of the coordinate system is required to express the obtained coordinates in an x, y, z system defined by the edges of the aquarium. The accuracy of the proposed method was estimated, and errors in extreme conditions were found to be 0.8% to 1.2 %, compared with the dimensions of the aquarium used in the test.