A target measuring method in ball machine video images
A target measurement, ball camera technology, applied in measurement devices, closed-circuit television systems, instruments, etc., can solve the problems of low measurement accuracy, high personnel cooperation, limited use of occasions, etc., to achieve a wide range of measurement and monitoring coverage. Effect
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Embodiment 1
[0062] The lens of the dome camera supports 1 to 20 times zooming. The subdivision of the zooming step of the lens is 0-0x4000, the resolution is 1920*1080, and the three-dimensional coordinates are 0 degrees in the true north, and increase to 360 degrees in turn to the right; In the vertical direction, the absolute horizontal is 0 degrees, and the downward movement increases to 90 degrees in turn.
[0063] like figure 1 As shown, a target measurement method in a dome camera video screen includes the following steps:
[0064] S1: Calculate the field of view angle of the dome camera at each magnification, specifically: align the dome camera with the drawing board, a scale is fixed on the drawing board, the scale is at the horizontal middle position of the monitoring screen, and move horizontally under one of the magnifications of the dome camera The plane makes the scale fill the monitoring screen, and record the scale value k at the left and right ends of the monitoring scree...
Embodiment 2
[0087] like Image 6 As shown, except that the target is the length measurement of the brake marks, and the length formula of the brake marks in step S6 is:
[0088] L = ( H tan t 1 ) 2 + ( H tan t 2 ) 2 - 2 * H tan t ...
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