User Manual - pancroma

NIR band, band 2 (green) and band 3 (red) in this order. Select ‘Preprocessing’| ‘Vegetation Index’ and the desired VI from the menu. If you check the ‘ActivateImage Processing Routines’ you can adjust the VI Scale Factor. This willdecrease or enhance the effect. After you compute the index, a grayscale imagewill be displayed. This is the Vegetation Index image. It will be used to replacethe green band for subsequent display as an RGB color composite. Save it inyour desired format, naming it ‘VI.tif’ or the like.The Normalized Burn Ratio (NBR) uses the red, NIR and MIR bands. Openthree band files: red band 3, band 4 (NIR) and band 7 (MIR) in this order.Select ‘Preprocessing’ | ‘Vegetation Index’ and ‘NBR’I from the menu. This utilitymodifies the red band so this must be substituted for the normal red band inorder to create the color composite NBR image.Now create an RGB color composite as usual by opening band1 (blue), thevegetation index band, and band3 (red), in this order. (Note: you can also usethe NDVI as the red band for perhaps a better contrast. This appears to be theconvention.) The resulting RGB image should have greener vegetation than thecorresponding RGB color composite image using bands 1, 2, and 3.If the vegetation is too green or not green enough, run another iteration exceptthis time check the ‘Activate Image Processing Routines’. Adjust the VI scalefactor using the slider bar at the lower right of the image processing data form.The default value is 0.05. An example NDVI image is shown below.The MSI and the NDWI use the mid infrared (MIR band 5) instead of the visiblered band, in addition to near infrared (NIR band 4) and green (band 2) bands. Tocompute these indices, open the NIR, green and MIR bands in this order. Select‘Preprocessing’ | ‘Vegetation Index’ and either ‘NDWI’ or ‘MSI’ from the menu. Ifyou check the ‘Activate Image Processing Routines’ you can adjust the VI ScaleFactor as before. This will decrease or enhance the effect. After you computethe index, a grayscale image will be displayed. This is the Vegetation Indeximage. It will be used to replace the green band for subsequent display as anRGB color composite. Save it in your desired format, naming it ‘VI.tif’ or the like.The list of available Vegetation Indices will increase. Example VI images areshown below. Clockwise from upper left: ENHG, VI, NDVI, MSI. Contact us ifyou need a specific index and we will look into adding it.IMPORTANT NOTE: As usual, you must open the files in the specified order orunexpected color tones will result.198