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Questions tagged [hyperspectral-sensor]

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Removing 'bad bands' from hyperspectral data in GDAL

I'm new to using GDAL and need to process hyperspectral data. I'm trying to get rid of bands within atmospheric absorption windows, but I'm note sure how to do that in GDAL or other python tools. My ...
monicaJ's user avatar
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1 answer
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Mosaicking hyperspectral images with band averaging over overlapping areas

I'm trying to use gdal.Warp to mosaic hyperspectral images with overlapping boundaries, but want to be able to do so while getting the average values of pixels within these overlapping ranges. The ...
monicaJ's user avatar
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Density slicing on raster with multiple bands

I want to style a 2 band raster file by density slicing in QGIS. I know I can select one band and display the ranges using 'singleband pseudocolour' or 'palleted/unique values', but the data I want to ...
QGISgreenhorn's user avatar
1 vote
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DIY Multispectral camera Rededge

I am trying to build my own multispectral camera using a Raspberry Pi, RGB camera, and Near IR Camera. My original goal was to measure the NDVI index. However I am now interested in the NDCI index as ...
mdansfo's user avatar
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Error in driver.Create() while creating a new raster

I want to divide each band of the hyperspectral data by a factor and then save it into a new raster. The function driver.Create() is showing an error and outDS raster is giving Nonetype value. outRefR ...
Ananya Srivastava's user avatar
4 votes
1 answer
1k views

Finding the centroid of every pixel in a raster Python

I am trying to get the centroid of every pixel in a aviris hyperspectral image (a raster) but my results are not quite as expected. The centroids don't seem to line up with the center of every pixel, ...
simplesyrup's user avatar
1 vote
0 answers
366 views

How to convert large size hyperspectral from tif to lan

I tried to convert hyperspectral from .tif to .lan format. There are three file with size about 1.5GB , 750MB and 200MB respectively. I use this code from osgeo import gdal src_fname = 'file.tif' ...
Yesinta Florensia's user avatar
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Where to find open tabular hyperspectral data for machine learning research?

Where can i find open datasets regarding " Wheat/Maize Leaf Spectra with Associated water content, Potassium and Nitrogen Measurements" for machine learning research i.e. hyperspectral ...
user2400412's user avatar
1 vote
0 answers
138 views

Google Cloud Image exporting blurry and small tiff images

I'm trying to export a image from GEE. For some reason, I'm getting a very small image size that is only 21x30 in dimensions. I'm trying to read it in Python and QGIS. Same problem in both platforms ...
Jaskaran Singh Puri's user avatar
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0 answers
310 views

Extracting hyperspectral pixel values to shapefile?

I have developed a workflow for a question that might have an easier answer. Say you have a hyperspectral image and a set of polygons overlapping the image. I want to extract all pixel values that ...
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FLAASH produces weird peaks

I am applying FLAASH to atmospherically correct and convert to reflectance a hyperspectral image acquired by our airborne system. The problem is that FLAASH (using ENVI) outputs an image where all ...
El Amraoui Abdelilah's user avatar
1 vote
2 answers
508 views

Using.divide to band math and output image is one color image using Google Earth Engine

When i used the.divide function to a previous substract of bands, my output result in the Map.addLayer is a totally full green square in the previously defined geometry. I've used this similar code to ...
Felipe Lillo Robles's user avatar
-1 votes
1 answer
104 views

R Code for Hyperspectral Band Selection Using Ensemble Method [closed]

I am looking for an existing R code that could do band selection using hyperspectral images. I have seen codes that do random forest for instance, but I hoping to use a code that does an ensemble of ...
GISnew's user avatar
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2 votes
1 answer
390 views

R Code for Hyperspectral Indices

I am planning to use R to read hyperspectral images and calculate hyperspectral indices. There seems to be scripts available online, but mostly for multispectral images. For instance, this code for ...
GISnew's user avatar
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2 votes
2 answers
149 views

High-resolution, hyperspectral satellite imaging?

I am hoping to expand my (biology-focused) research to include satellite data. For this, I'd need satellite imaging that includes multiple values in the visible spectrum (specifically, above 490nm) ...
Laura's user avatar
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Area under the spectral curve?

There is an existing similar question here that I have tried but didn't give me what I need. I have an image with 20 spectral bands. How do I compute the area under the spectral curve that is ...
GISnew's user avatar
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2 votes
2 answers
1k views

Feature normalization (scaling) for Hyperspectral images

I have been straggling with the concept of feature normalization for the hyperspectral images. Respect to my problem I have attached a picture of my problem which clearly stands the issue which I have....
morteza's user avatar
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1 answer
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Using Hyperion with Google Earth Engine [closed]

I am trying to use Hyperion Data for my project, unfortunately even loading the Image Collection of Hyperion exceeds my maximum 2.5 GB Data Storage. Hyperion has a revisitrate of 200 Days, so a one ...
Alexander Vocaet's user avatar
2 votes
0 answers
212 views

6s atmospheric correction for hyper spectral data

I am trying to customize atmospheric correction for hyper-spectral data. Presently for Landsat I am using the i.atcorr GRASS GIS module. I want to know whether 6S atmospheric correction can be used ...
user28542's user avatar
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2 votes
0 answers
191 views

When to rescale reflectance data to calculate vegetation indices

I'm attempting to calculate a number of vegetation indices using hyperspectral AVIRIS data in ENVI. Some of these indices are normalized, such as NDVI, whereas others are not, such as the Transformed ...
user5858's user avatar
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2 votes
2 answers
3k views

ENVI band math incorrect values

I'm attempting to calculate vegetation indices in ENVI 5.2 using level-2 AVIRIS data in band math. The indices I'm working with are Vogelmann Red Edge 2, normalized difference red edge, and red edge ...
user5858's user avatar
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1 vote
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white image while Trying to mosiac two hyperspectral data in ENVI

I am trying to mosaic two aviris-ng georefrenced hyoerspectral data but one of them become white in preview. so I am not able to mosaic the image.enter link description here error ink
Blackhat's user avatar
2 votes
2 answers
1k views

Making CIR imagery in QGIS

I want to compose a CIR image in QGIS. Images are part of sample dataset downloaded from Micasense website. I built virtual raster out of Red, Green and NIR rasters but the output file color scheme ...
proteus's user avatar
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1 vote
1 answer
907 views

TypeError: 'BilFile' object does not support item assignment

I want to use Python and Spectral library to open a hyperspectral image as ENVI file (.hdr + .dat), rewrite some bands and then save the file in the same format. I have problem with this: "...
Grixus's user avatar
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3 votes
1 answer
522 views

Resampling hyperspectral data to Landsat 5 TM bands

The convolution of hyperspectral data to Landsat 5 TM bands is done by using the spectral response function (SRF, or Relative Spectral Response [RSR]) of Landsat 5 TM sensor. The ranges of each valid ...
José Lucas Safanelli's user avatar
1 vote
0 answers
499 views

Database of labeled hyperspectral imagery

Are there any datasets of hyperspectral imagery that can be used for AI training and classification, comparable to ImageNet? The Universitat de Valencia has one listed on their site, HyperLabelMe, but ...
therxv's user avatar
  • 119
1 vote
0 answers
236 views

How to seperate class labels of hyperspectral images using R?

The image has different classes and different band, where the 220 bands are separated by the following code library(RStoolbox) library(raster) library(rgdal) library(caret) library(...
Nandhini's user avatar
1 vote
0 answers
162 views

Software for matching spectral end members with spectral library

I am working with Moon Mineralogy mapper(M3) - hyper-spectral data and i am trying to match the endmembers obtained from M3 with RELAB spectral library. I have tried spectral analyst tool in ENVI but ...
Aeron Storm's user avatar
8 votes
2 answers
4k views

How to get the wavelength values of bands from hyperspectral image?

I am trying to open and read a hyperspectral image using GDAL like below. So after reading the data like this : data = gdal.Open( filename ) then I can see the x, y, dim information of the dataset :...
Pruthvi Patel's user avatar
10 votes
2 answers
26k views

Difference between irradiance and radiance, remote sensing reflectance and water leaving radiance

I've been trying to lay my hands on textbooks, etc, that explain the differences between the remote sensing terms in lay man language. radiance and irradiance remote sensing reflectance and water ...
user18058's user avatar
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