Source code for pysptools.util.envi

#
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# Copyright (c) 2013-2014, Christian Therien
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# Licensed under the Apache License, Version 2.0 (the "License");
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#    http://www.apache.org/licenses/LICENSE-2.0
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# envi.py - This file is part of the PySptools package.
#

"""
load_ENVI_file, load_ENVI_spec_lib functions
"""


import numpy as np
import spectral.io.envi as envi

[docs]def load_ENVI_file(file_name): """ Load the data and the header from an ENVI file. It use the SPy (spectral) library. At 'file_name' give the envi header file name. Parameters: file_name: `path string` The complete path to the file to load. Use the header file name. Returns: `tuple` data: `numpy array` A (m x n x p) HSI cube. head: `dictionary` Starting at version 0.13.1, the ENVI file header """ img = envi.open(file_name) head = envi.read_envi_header(file_name) return np.array(img.load()), head
[docs]def load_ENVI_spec_lib(file_name): """ Load an ENVI.sli file. Parameters: file_name: `path string` The complete path to the library file to load. Returns: `numpy array` A (n x p) HSI cube. head: `dictionary` Starting at version 0.13.1, the ENVI file header """ sli = envi.open(file_name) head = envi.read_envi_header(file_name) return sli.spectra, head