Subject:
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Re: Color images? (was: Re: digital camera entirely made of mindstorms?)
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 27 Sep 2000 16:06:15 GMT
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Viewed:
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2375 times
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In theory, yes I believe it could be done, however I would be concerned that a
1x2 filter would be so thick as to distort the image drastically... better to
take a sheet of transparency material and print a red, green and blue spot and
attach it possibly to a wheel/pulley (sorry I'm at work and not in full Lego
mode) the 6 holed variety and rotate it with a rotation sensor to lock in the
correct positioning.... ?
I had an article on how to due color scanning with a BW hand scanner that was
a multipass using filters... I think rotating the filters in and having the
exact lens positioning would work much better.
DaveP
In lugnet.robotics, David Eaton writes:
> In lugnet.robotics, David Eaton writes:
> > Ok, maybe I'm just out in left field on this one, or maybe someone will
> > actually be inspired to try it out... How about making a color digital • camera?
> >
> > Proposal: modify the existing design for the camera by adding on a colored
> > filter, and an extra motor. Bascially, create a wheel at the end of the lens
> > which had trans-red, trans-green, and trans-blue pieces. For each pixel that
> > the camera takes, cycle the filter for R, G, & B values. You'd have to tweak
> > the results a lot, but could it be done?
> >
> > DaveE
>
> Ok, so it's uncouth to reply to my own messages, but more on the color
> blending:
>
> -each filter could be 2 1x2 trans bricks-- the red filter would be green &
> blue, green would be red & blue, blue would be red & green
> -you'd also have a 4th filter (a hole) for a baseline gamma value. Hence, you
> could determine how much additional gamma you'd need to add for weighting the
> filtered values. So if you got an RGB of 10,30,20 (all out of 100, not 255) • and
> a gamma of 80 (out of 100), you could bump up the RGB to something like
> 20,40,30 (well, ok, you'd have to figure out the percentages, but that's just
> for example)
>
> DaveE
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