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LeafKam



Five alternative models for an infrared plant health camera.

  1. 1) One camera with a filter switcher which switches between IR block and IR pass filters
  2. 2) Two cameras, one unmodified and one with an IR pass filter
  3. 3) One camera with a "superblue" (Schott BG3) filter.
  4. 4) Two cameras, one unmodified and one with a "superblue" filter.
  5. 5) One camera with a filter switcher which switches between a normal IR block filter and a "superblue" filter.
Feature ..1.. ..2.. ..3.. ..4.. ..5..
number of cameras 1 2 1 2 1
filter switcher 1 0 0 0 1
normal RGB color output Y Y N Y Y
optics modified for RGB image? Y N na N Y
NRG output Y Y N Y Y
NDVI output Y Y Y Y Y
shutter sync for NDVI N Y N N N
shutter sync for NRG N Y na Y N
filter switcher sync for NDVI Y N N N N
filter switcher sync for NRG Y N N N Y
rectification for NDVI Y Y N N N
rectification for NRG Y Y na Y Y
parallax for NDVI N Y N N N
parallax for NRG N Y na Y N
RGB/NIR synchrony possible? N Y Y Y N
buy superblue filter? N N Y Y Y

Notes:

1.Shutter sync: Is it necessary to synchronize the shutters of two cameras to make multispectral images when the cameras or subject are moving?

2.Filter switcher sync: Is it necessary to synchronize the camera shutter with the switching of filters?

3.Rectification: Is it necessary to rectify (align) data from two different photos to make multispectral images?

4.Parallax: Is rectifying two images subject to parallax errors when subjects in the scene are both near and far from the camera?

5.RGB/NIR synchrony: Is it possible to capture all the data needed for multispectral images simultaneously (which is needed when the camera[s] or subject are not stationary)?


near-infrared-camera infrared-camera infragram development