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Geographic Information Systems

Questions tagged [dark-object-subtraction]

A simple atmospheric correction method for satellite imagery.

7 questions
Info Newest Frequent Votes Active Unanswered
-1
votes
1answer
143 views

Is it required to do DOS using Sentinel 2 image for land cover change detections

Sentinel 2 imagery is already ortho-corrected and georeferenced. However I wish to know how important it is to correct further and which correction to carry out.
3
votes
1answer
184 views

Does RapidEye level 3A imagery need any kind of preprocessing before applying classification?

I just got some rapideye images and I would like to know if there is need of any preprocessing before applying classification to it? I know that there isn't any automated way of, for example, applying ...
1
vote
1answer
91 views

When calculating temperature from Landsat is it necessary to use TOA?

I'm attempting to calculate temperature from Landsat 5 and 8 thermal bands. I've already calculated NDVI, where the NDVI bands were corrected using dark object subtraction. I see that many people use ...
1
vote
0answers
66 views

Pre-processing in remote sensing [duplicate]

I have a bit of confusion on the pre-processing of remote sensed images. Do atmospheric correction methods such as Dark Object Subtraction convert the DN into reflectance values? If not, it is ...
1
vote
1answer
154 views

comparison of atmospheric correction methods

I have noticed that dos methods for atmospheric corrections are in the section of radiometric correction i.*.toar on GRASS GIS. Does that means that dark object subtraction (DOS) is a method for doing ...
4
votes
1answer
1k views

Python script for dark object subtraction on Landsat 8 Imagery

Does anyone know of any python scripts that will allow me to conduct such a process? I am limited to open source software and have minor experience in Python.
1
vote
2answers
918 views

How to find the minimum pixel value within a region of interest?

I am working on a Python script for dark object subtraction, a radiometric correction method for remotely sensed data.To accomplish this, I need to find the minimum band pixel value of a waterbody ...