image acqusition toolbox ; exposure time

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Im using a USB camera with winvideo driver. I want to change the exposure time via MATLAB image acquisition toolbox.Exposure is between -13 and 4. What are these numbers refer?For ex; i chose 4 and exposure time is 16 sec.

Accepted Answer

Walter Roberson
Walter Roberson on 28 Jun 2011
Those times are possibly log2 of the exposure time. 2^4 is 16

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