Questions tagged [dark-object-subtraction]
A simple atmospheric correction method for satellite imagery.
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68 views
How to find the Minimum value for the Dark Object Subtraction in ERDAS?
I have a Landsat 7 Image with MTL file showing minimum value as 1 and the maximum value is 255. The water pixels show a range of 63 to 74. In the image, there are a few pixels that have a value of 1, ...
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1answer
135 views
Formula Dark Object Subtraction 1 QGIS (Semi-automatic Classification Plugin)
I am using QGIS with the plugin Semi-Automatic Classification Plugin to apply DOS1 atmospheric correction to bands 3 and 8 of Sentinel-2. Example:
I want to automate this task with a python script ...
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1answer
219 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.
4
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1answer
272 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 ...
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1answer
107 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 ...
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0answers
73 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 ...
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1answer
205 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.
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2answers
1k 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 ...
