10
votes
Difference between irradiance and radiance, remote sensing reflectance and water leaving radiance
I've found two sources that appear to provide easy to read explanation between Radiance vs. Irradiance and remote sensing reflectance and water leaving radiance.
Starting with Radiance vs. Irradiance:
...
- 11.9k
3
votes
Accepted
R Code for Hyperspectral Indices
You may consider using the R package hsdar as a starting point to carry out transformation of spectral response data as well calculation of vegetation indices. You will find additional information ...
- 4,752
3
votes
Accepted
Feature normalization (scaling) for Hyperspectral images
It would help if you could provide more information on your case.
Are you struggling with a particular application?
How does feature scaling relate to the rest of your workflow?
Based on what ...
- 121
2
votes
Feature normalization (scaling) for Hyperspectral images
I have found the answer:
For a classification task, feature scaling should be done for each individual pixel, not for the individual band. That means, we need to compute mean for the individual ...
- 303
2
votes
Accepted
Resampling hyperspectral data to Landsat 5 TM bands
You should use only the red line, the FWHM, as is recomended in USGS Spectral viewer(Here):
To simulate how a sensor detects a surface feature in a given spectral band, the feature's spectrum is "...
- 665
2
votes
R Code for Hyperspectral Band Selection Using Ensemble Method
The only method that you mentioned that meets the criteria of being an ensemble method and providing variable importance is random forests. I would direct you to the parameter selection methods ...
- 29.5k
1
vote
High-resolution, hyperspectral satellite imaging?
Consider WorldView 2 or 3, with 0.5 m spatial resolution and including red-edge and near-infrared bands. However, Worldview images are proprietary data from Digital Globe and must be purchased.
- 955
1
vote
How to get the wavelength values of bands from hyperspectral image?
As others have mentioned, wavelengths aren't part of the standard data model so for data in ENVI format it is best to extract from the associated '.hdr' file separately, which is just a text file and ...
- 867
1
vote
How to get the wavelength values of bands from hyperspectral image?
What you need to do is parse the 'fmmyyddtnnpnnrnnrdn_v_.spc' file associated with your dataset. Each line in that file corresponds to a band in your image.
First column in the file is the 'Wavelength ...
- 6,386
1
vote
Using Hyperion with Google Earth Engine
Your filtered collection is named 'S2', but you erroneously call the unfiltered 'HyperionCol' using your print statement, which consists of 82152 elements (too much to display).
Unfortunately, no ...
- 9,298
1
vote
Making CIR imagery in QGIS
It looks like your bands are not in the correct order to create the false color composite you're after. In your image showing your output for the NIR, Red, and Green composite it looks like the NIR ...
- 3,895
1
vote
TypeError: 'BilFile' object does not support item assignment
finaly I find out solution. If you have similar problem, you can load imaage to memmap like this. Then you can work with ENVI file and for saving just delete variable.
src = envi.open(filename_hdr)
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- 91
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