Pie Chard Analysis

[mfitzsimons]

Don't ask but need to try to analyze what percentage of the pie is displayed.  It can be in any orientation rotationally and be between 1 and 99% (whole percentages) of the pie.  I tried multiple techniques using calipers but not looking promising.  I will post a few sample images I anyone has any ideas on how to determine how much of the pie is displayed.

Thanks for any tips!

[AnalogKid2DigitalMan]

Not sure what functions in Vision exist (if any)

-Try color matching and count numbers of pixels occupied by each, the ratio of green/grey will be the percentage. This won't work on the last example though.

-AK2DM

[mfitzsimons]

I seem to be having some success processing the image down to binary and using the Straight Edge (Rake) function.  Will post when I get something working.  Need to try on actual images and not simulated.  Color matching will be my backup plan.

Thanks

[Andrey_Dmitriev · Accepted solution]

The easiest way (probably) - just counting pixels, and then calculation ratio area / whole circle area, something like that:

 

Andrey.

Message Edited by Andrey Dmitriev on 02-15-2010 11:51 PM

[mfitzsimons]

Thanks!  Now I see the solution I agree that area would be the easiest.  The best solutions are the simple ones.  Kudos for everyone.