Public Lab Research note


More Infragram sample webcam tests

by warren | | 3,007 views | 2 comments |

Read more: publiclab.org/n/8963


Following up on my recent posts on Infragram tests, I just received a new sample, of this webcam:

http://www.alibaba.com/product-gs/1080897406/2_Megapixel_usb_camera_board.html

The lead image is what I see when I take a photo through it; it has no built-in infrared block filter. Then I took a photo with a Rosco #2007 filter in front:

2013-08-05-133338.jpg

Very dramatic! But possibly not useful, since it seems all 3 channels are being saturated with infrared light from plants. Not only do the histograms show poor differentiation between red and blue (see below), but vegetation looks basically identical in both images. Boo... moving on to the next sample...

Screen_Shot_2013-08-05_at_2.30.36_PM.png

IMG_20130805_133909.jpg


2 Comments

Did you make sure the IR LEDs were not shining on the filter? That might might have some effect. I also notice that the stack(?) in the sky line does not show detail in the filtered picture.

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yes, thanks; unfortunately it never ended up working, but check out this update; we have some decent options now: http://publiclab.org/notes/warren/08-20-2013/infragram-webcam-conversion-test-with-i-zone-cameras

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