| Summary: | 碩士 === 國立中興大學 === 資訊科學與工程學系 === 105 === The purpose of this paper is to uses two cameras and raspberry pi to construct the stereoscopic vision system, which is used to track the mosquito and record the moving trajectory in 3-D space. Then we get the three-dimensional coordinates and analysis behavior of mosquito.
We first apply how to do camera calibration to find out the intrinsic and extrinsic parameters between two cameras. And we can understand the camera''s internal geometry and its position in space. The step start with the left view, the position of the mosquito in the stereoscopic image is found by means of the motion detection method. According to the limit of epipolar geometry, check whether the target position detected by the right view has the same characteristics, using the triangulation and the intrinsic and extrinsic parameters of the camera derive the three-dimensional coordinates of the target, record the current time and coordinates of the information, and finally restore the recorded to the three-dimensional coordinates, observe the trajectory and analysis mosquito flying behavior.
In the case of infrared light observation at night, due to the combination of the infrared ray and the camera body, the infrared rays illuminate the reflected light on the observation box, affecting the observation of the camera, the position of the infrared fill light, and should avoid direct exposure or reflection to the camera Image contrast of the screen is too large, affecting the camera to detect the effect of mosquitoes. If the sampling frequency of the system is fixed, that is, the sensitivity of the motion detection (how much mosquito movement triggers the record) is inversely
proportional to the flight speed of the mosquito. The faster the mosquito flew, the more the trajectory of the flight. Motion detection is less sensitive to vertical flying mosquitoes.
In this paper, we use mechanical vision method to observe the trajectory, mosquitoes can be inferred in the observation box in the way of flight and distribution of activities, if some mosquitoes fly above the box, some are below, or activity Lower, less trajectory and so on.
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