View from Caedmon Hall onto the Acre

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Thursday, January 14, 2010

New Software Testing

The latest version of the camera capture software is now under beta test with the Back-Caedmon camera in my office (see top right small image on this blog).

The main feature of this version is that it measures the change within an image with respect to a reference image, and when this change exceeds a threshold, it automatically captures a new image. This will change the picture automatically more frequently when there are activities in the scene.

There is a baseline capture frequency, set at 10 minutes. When 10 minutes are over, a new image is captured, independent of the change, and it is then used as the new reference image. This reference baseline capture could be extended to longer times.

From first experiments today, it can be seen that the time interval for the automatically captured images is around 3-7 minutes, when the threshold for change is set to a value of 10 (this value is normalised to 255: a max value of 255 would mean that all pixels in an image change from completely black=0 to completely white=255).

I will keep the Back-Caedmon camera running with this software, and if it runs stable I will then update the regular Headingley-Caedmon Webcam with this version.

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