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New Member
Posts: 1
Registered: ‎12-01-2019

Spectral profile of two images in one plot



I have two images before and after atmospheric correction, I would like to do a comparison between landcover features within the two images by plloting the spectral signature of each feature in one plot. Is it possible?


Thank you,

Technical Evangelist
Posts: 673
Registered: ‎02-02-2016

Re: Spectral profile of two images in one plot

In order to plot the spectral signature from two separate images in one spectral profile you will need to display both images together in a 2D View as a virtual stack.


  1. Click on ERDAS IMAGINE’s File tab and choose Open > Raster Layer.
  2. Select both of your images in the Select Layer To Add dialog then click on the Multiple tab then choose the Virtual Stack option and click OK.
  3. You will need to calculate statistics fort the virtual stack image before creating a spectral profile.
  4. Open the Image Metadata tool (right-click on the virtual stack file name in the Contents panel and select Metadata).
  5. In the Image Metadata tool click on the Edit menu and select Compute Pyramid Layers/Statistics.
  6. In the Pyramid Layers/Statistics Generation Options dialog make sure that the Compute Statistics option is enabled and click OK.
  7. Close the Image Metadata window after the statistics are calculated.
  8. Open the Spectral Profile tool (Multispectral tab > Utilities group > Spectral Profile).
  9. In the Spectral Profile window select the Create New Profile Point in View crosshair icon, then click on the feature(s) in your image that you want to compare.

Kind regards,


Stephen Bent

Hexagon Geospatial Support