Subject:
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Re: Lght Sensor & Three colors?
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Wed, 7 Feb 2001 11:40:06 GMT
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Viewed:
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1454 times
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In lugnet.robotics.rcx, Matthew Fisher writes:
> Can the light sensor accurately distinguish between THREE colors? All the
> designs I've seen work with two; e.g. a brick sorter, green & red.
>
> And if so, what colors are recommended: Red, Green, Blue? Black, White,
> Grey?
>
> Thanks.
The light sensor doesn't actually "see" colors, it only distiguishes between
dark and light. Therefore I have found that using different grey scales is a
good way to make distinguishable "colors". Different grey scales can be made
by printing them onto paper, and then wrapping the paper around the objects.
I have been able to distinguish between 5 different grey scales, from white
to black, this way, but it could be expanded to more, though with a higher
probability of error.
Note: This was programmed with Lejos. I don't know if it is possible with the
Robotics Invention System.
Rune
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Message is in Reply To:
 | | Lght Sensor & Three colors?
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| Can the light sensor accurately distinguish between THREE colors? All the designs I've seen work with two; e.g. a brick sorter, green & red. And if so, what colors are recommended: Red, Green, Blue? Black, White, Grey? Thanks. (23 years ago, 16-Jan-01, to lugnet.robotics.rcx)
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