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11/29/12 04:49 AM
Re: NDVI - preprocessing [re: samrae]Report this article as Inappropriate to us !!!Login to Reply

Depends on what you are doing with the NDVIs, but the formula has a mild normalization of the data when the atmospheric conditions are somewhat similar when comparing two different images of similar times in the region’s phenological cycle. There is some imperfection as we have to go through the atmosphere twice (light down to the ground, and them back up to the sensor), all the while the near infrared light trying to get past the water in the atmosphere (which absorbs NIR light), and other elements in the atmosphere). In general:


-1 to 0 value = no chlorophyll activity in the leaf’s spongy mesophyll (no photosynthesis activity)

0 to 1 values = chlorophyll activity in the leaf’s spongy mesophyll (photosynthesis occurring)

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SubjectPosted byPosted on
*NDVI - preprocessing samrae   06/22/12 07:38 AM
.*Re: NDVI - preprocessing jesspinto   03/23/13 02:30 AM
.*Re: NDVI - preprocessing mali   06/06/16 04:52 AM
.*Re: NDVI - preprocessing pbeaty   11/29/12 04:49 AM
.*Re: NDVI - preprocessing DrGuy   12/05/12 07:07 AM
.*Re: NDVI - preprocessing DrGuy   12/05/12 07:12 AM
.*Re: NDVI - preprocessing LColson   07/05/12 07:20 AM
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