[Mlt-devel] NDVI processing

[Stefan G. <li...@ho...>]

Hi,

I'm using modified cameras from multicopter platforms and would like to
create NDVI false color footage. Generally, I'm using KDEnLive but I'm
also having an eye on Shortcut.

NDVI imagery is usually created with a camera which has no IR cut filter
but an infrablue filter (e.g. Rosco 2007). The resulting footage has
visible light in the blue channel and IR in the red channel.

You then take each channel, convert it to greyscale and create the NDVI
image according to this math:

NDVI = (IR - VIS) / (IR + VIS)

The resulting greyscale image is then usually luma-mapped to a gradient.
The luma-mapping is already available in the frei0r package (Color
Effect/heat).

Would MLT be the right point to have this math processing? Would anybody
be interested in implementing it?

NDVI imagery is a great tool for vegetation health assessment and since
it's nowadays very easy to hack all kinds of cameras to produce
infrablue imagery, it's quickly gaining popularity in the "grass-roots"
environmentalist scene.

-Stefan

-- 
 (o_   Stefan Gofferje            | SCLT, MCP, CCSA
 //\   Reg'd Linux User #247167   | VCP #2263
 V_/_  Heckler & Koch - the original point and click interface