Example NDVI Survey

Example of a reconstructed image set collected with an MSDC-RGBN-1-A drone camera.  The color and NDVI images represent composites reconstructed from 167 RGB-NIR multispectral images.  Brilliant green areas represent NDVI close to 1 indicative of vegetation rich in chlorophyll.  Red areas represent NDVI close to 0 indicative of vegetation lacking chlorophyll.  An overlay showing NDVI over COLOR at 50% transparency (NDVI/COLOR) is shown to highlight the precise co-registration of the color and NDVI images.  Also shown, a 3D rendering reconstructed from the RGB multispectral images (3D RECON) and a color image with exposure positions marked in blue (CAMERAS).  Images were captured every 3m at a flight speed of 5m/s and altitude of 30m.  Exposure time was 2ms per frame.  The camera was fitted with a 16mm standard lens with an aperture of f/4.5. the field of view per frame was 21.12m x 21.12m with a ground pixel size of 4cm x 4cm (2cm x 2cm debayered).  Image processing was performed with Spectral Devices multispectral batch processing software and 3DF Zephyr Lite (3Dflow Srl). All images were down-sampled for web viewing.