Hypercube correction to measured spectrum - NV5 Geospatial

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Last Post 16 May 2017 11:37 AM by MariM

Hypercube correction to measured spectrum

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Jennifer

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12 May 2017 02:28 AM
Hi, I am running ENVI 5.3 + IDL 8.5 (64bit) I have hyperspectral images (.bil) of 9x9cm panels and each image also includes a Spectralon 50% reflectance standard. I want to convert the entire cube from DN to reflectance by scaling each pixel to the mean spectrum of the 50% reflectance standard. Any advice as to the easiest way to do this? I right now I am thinking - select an ROI for the reflectance standard in my image, quick stats to get mean spectrum for the ROI, export mean spectrum to IDL - use the spectrum x 50% to apply a Gain to the entire cube Any other advice? Thanks, Jennifer

MariM

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16 May 2017 11:37 AM
I think you could use Spectral math to divide/multiply the mean spectrum from your ROI into the data cube: https://www.harrisgeospatial.com/docs/SpectralMath.html

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