Usage
Installation
To use hyperquest, first install it using pip:
$ pip install hyperquest
If using Windows PC, you must have “Build Tools” installed to compile cython code, - Testing on my beat-up Windows PC (Windows11), I did the following to get it to work
Installed Visual Studio Build Tools 2022
making sure to check the box next to “Desktop development with C++”
and then, pip install hyperquest
Table of Methods
Category |
Method |
Description |
|---|---|---|
SNR |
hrdsdc() |
Homogeneous regions division and spectral de-correlation (Gao et al., 2008) |
rlsd() |
Residual-scaled local standard deviation (Gao et al., 2007) |
|
ssdc() |
Spectral and spatial de-correlation (Roger & Arnold, 1996) |
|
Intrinsic Dimensionality (ID) |
random_matrix_theory() |
Determining the Intrinsic Dimension (ID) of a Hyperspectral Image Using Random Matrix Theory (Cawse-Nicholson et al., 2012, 2022) |
Co-Registration |
sub_pixel_shift() |
Computes sub pixel co-registration between the VNIR & VSWIR imagers using skimage phase_cross_correlation |
Striping (not destriping) |
sigma_theshold() |
As presented in Yokoya 2010, Preprocessing of hyperspectral imagery with consideration of smile and keystone properties. |
Smile |
smile_metric() |
Similar to MATLAB “smileMetric”. Computes derivatives of O2 and CO2 absorption features across-track (Dadon et al., 2010). |
nodd_o2a() |
Similar to method in Felde et al. (2003) to solve for nm shift at O2-A across-track. Requires radiative transfer model run. |
|
Radiative Transfer |
run_libradtran() |
Runs libRadtran based on user input geometry and atmosphere at 0.1 nm spectral resolution. Saves to a .csv file for use in methods requiring radiative transfer. |
Example
see the following for an example using an EMIT image, - https://github.com/brentwilder/HyperQuest/blob/main/tutorials/example_using_EMIT.ipynb