LeafKam
This is a revision from April 19, 2013 01:51.
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Four alternative models for an infrared plant health camera.
- 1) One camera with a filter switcher which switches between IR block and IR pass filters
- 2) Two cameras, one unmodified and one with an IR pass filter
- 3) One camera with a "superblue" (Schott BG3) filter.
- 4) Two cameras, one unmodified and one with a "superblue" filter.
- 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 |
| 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.Rectification: Is it necessary to rectify (align) data from two different photos to make multispectral images?
3.Parallax: Is rectifying two images subject to parallax errors when subjects in the scene are both near and far from the camera?
4.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)?