What I want to do
We'd struggled a year ago to get a CMOS-sensor based Canon SD4000IS working as an Infragram modified camera, so when @nedhorning, @mathew and @cfastie posted about the red filter Infragram technique, I was eager to see if that could get this excellent camera working. You can read more about Mathew and Chris's research here: http://publiclab.org/notes/mathew/04-30-2014/rosco-replacements-for-wratten-25a-pt-2
My attempt and results
My SD4000IS already had its infrared block filter removed, so I just taped a piece of Rosco Fire filter over the front. It seems to have worked very well! Much better differentiation than with a blue filter:
http://infragram.org/i/53e519b10ab503231b000c17 (lead image)
http://infragram.org/i/53e519870ab503231b000c16
http://infragram.org/i/53e519440ab503231b000c15
Questions and next steps
It'd be more ideal to test these in a grassy field, but these are encouraging!
9 Comments
Your new Infragram SD4000 seems to have promise. Here is one with my new lut:
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Oh cool! do you want to post your LUT in a numeric format so we can post it as an Infragram.org option?
The format is:
colormap = segmented_colormap([[0, [0, 0, 255], [38, 195, 195]], [0.5, [0, 150, 0], [255, 255, 0]], [0.75, [255, 255, 0], [255, 50, 50]]]);where the outermost
[ ]contain a set of[x-position,[r,g,b]]items -- x-position measured from 0-1.And a name for your LUT and a place to link to for more information about it. Maybe http://publiclab.org/wiki/infragram-luts ?
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