DB550_850-22.5 | DB550/850 Dual Bandpass Green + 850nm NIR

Midwest Optical SystemsSKU: MID DB550_850-22.5
Lead Time: 15 Business Days

Price:
Sale price$207.00 USD

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Lead Times are estimated based on standard product lead times, but are subject to change. For the latest product lead times, we always recommend contacting us.

Description

The MidOpt DB550_850-22.5 complements the DB660/850 and DB475/850 filters. When modifying a single color camera by removing its IR blocking filter, the incorporation of this filter in its place allows reflected near-infrared light (850nm) to be captured in the camera sensor’s red channel and reflected green light (550nm) to be captured in the sensor’s green channel (the blue channel is not used). Healthy vegetation will absorb (not reflect) green light and strongly reflect near-infrared light. Thus, this information can be used to apply a false-color gradient to images, better highlighting the contrast between healthy vegetation and areas with stressed, diseased, or no vegetation.

There is a range of vegetation indices used by the remote sensing and precision agriculture community, and while NDVI is probably the most common, each have their advantages. Any of the indices listed below can be used when employing a single-color sensor camera that has been converted with a DB550/850 filter. Information gathered can then be overlaid on vegetation maps to inform better crop management decisions.

Green Chlorophyll Index
CIg = (NIR / Green) – 1

Green Difference Vegetation Index
GDVI = NIR – Green

Green Normalised Difference Vegetation Index
GNDVI = (NIR – Green) / (NIR + Green)

Green Ratio Vegetation Index
GRVI = NIR / Green

Green Soil Adjusted Vegetation Index
GSAVI = [(NIR – Green) / (NIR + Green + 0.5)] * (1 + 0.5)

All MidOpt filters can also be purchased unmounted or in custom dimensions upon request from Machine Vision Direct.

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