2,486
edits
Changes
Jump to navigation
Jump to search
Line 544:
Line 544: − +
Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 17:04, 8 March 2011
, 17:04, 8 March 2011→Brightness
===Brightness===
===Brightness===
The average brightness of the image is calculated by the 'brightness' block [[File:Brightblock.jpg]]. As at V106, the automatic gain control (AGC) is still functioning. The camera tries to correct the image brightness to a standard brightness, then calculates the average brightness. The result is a non linear relationship between actual and the measured brightness. Also, some parts of the image are brighter than others further complicating things. Using a diffuser, e.g. translucent material like a plastic bag, may help.
The average brightness of the image is calculated by the 'brightness' block [[File:Brightblock.jpg]]. As at V106, the camera's automatic gain control (AGC) is still functioning. The camera tries to correct the image brightness to a standard brightness, then calculates the average brightness. The result is a non linear relationship between actual and the measured brightness. Also, some parts of the image are brighter than others further complicating things. Using a diffuser, e.g. translucent material like a plastic bag, may help.
[[File:Brightness.jpg]]
[[File:Brightness.jpg]]