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Confidence Value
Frank Lorenzi from United States [11 posts] |
8 year
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Steve
That was going to be my next question. Right now I'm using the "Filter Value" field in the "Shape Matching" module to verify a green ball. The min. is 50 and the max. is 95. The Phidget 888 bit setting is 1. Is a Phidget 888 setting of 1 okay?
Thanks.
Joe
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Joe
Watch the bit setting when using the Confidence value. That will range from 0 to 100 which means if you set it to bit 6 that will only trigger when above 6, or 32 for bit 5, etc. (power of 2 numbers). If you set it to bit 7 (128) that will not do anything.
Steve
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Steven Gentner from United States [1446 posts] |
8 year
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Joe,
The bit setting of 1 would toggle the relay quite frequently as the number changes. I would expect that you probably want to use a higher number.
I would have used a bit of code to threshold the value. i.e.
if getVariable("FILTER_VALUE") > 80 then
setVariable "toggle", 1
else
setVariable "toggle", 0
end if
in a VBScript or other programming module and then use the "toggle" variable in the 888 interface with bit set to zero. That gives you much better control over how confident a match needs to be in order to trigger a relay.
STeven.
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