enviinfo

Read metadata from ENVI header file

Syntax

info = enviinfo(file)

Description

info = enviinfo(file) reads the metadata from ENVI (Environment for Visualizing Images) header file.

Note

This function requires the Image Processing Toolbox™ Hyperspectral Imaging Library. You can install the Image Processing Toolbox Hyperspectral Imaging Library from Add-On Explorer. For more information about installing add-ons, see Get and Manage Add-Ons.

Examples

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Read ENVI Header File

This example uses:

Image Processing Toolbox Hyperspectral Imaging Library Image Processing Toolbox Hyperspectral Imaging Library

Open Live Script

Read an ENVI header file into the workspace.

info = enviinfo('paviaU.hdr');

Create a hypercube object using the Filename of the ENVI header file.

hcube = hypercube(info.Filename)

hcube = 
  hypercube with properties:

      DataCube: [610×340×103 double]
    Wavelength: [103×1 double]
      Metadata: [1×1 struct]

Read ENVI Binary Data File Using Metadata from ENVI Header File

This example uses:

Image Processing Toolbox Hyperspectral Imaging Library Image Processing Toolbox Hyperspectral Imaging Library

Open Live Script

Read an ENVI header file into the workspace.

info = enviinfo('indian_pines');

Read from the ENVI binary data file by using the metadata from the ENVI header file.

data = multibandread('indian_pines.dat',...
    [info.Height info.Width info.Bands],...
    info.DataType,info.HeaderOffset,info.Interleave,info.ByteOrder);

Input Arguments

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`file` — Name of ENVI header file
string scalar | character vector

Name of ENVI header file, specified as a string scalar or character vector. An ENVI header file must have the extension .hdr. If you do not specify a file extension, then the function looks for a file with the specified name and the .hdr file extension.

Data Types: char | string

Output Arguments

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`info` — Information about ENVI data and metadata
struct

Information about ENVI data and metadata, returned as a structure array containing at least these fields. If the ENVI header file contains additional fields, then the structure array contains those additional fields as well.

Field	Description
`Height`	Height of the image or number of rows in the image, returned as a positive integer.
`Width`	Width of the image or number of columns in the image, returned as a positive integer.
`Bands`	Number of spectral bands, returned as a positive integer.
`DataType`	Data type of data in the ENVI file, returned as any of these values: `"single"` `"double"` `"uint8"` `"uint16"` `"int16"` `"uint32"` `"int32"` `"uint64"` `"int64"`
`Interleave`	Data interleave, returned as any one of these values: `"bsq"` — Band-sequential `"bil"` — Band-interleaved-by-line `"bip"` — Band-interleaved-by-pixel
`HeaderOffset`	Zero-based location of the first element in the image file, returned as a positive integer. The header offset represents the number of bytes from the beginning of the image file to the start of the image data.
`ByteOrder`	Endianness of the data, returned as the string `"ieee-le"` for little endian or `"ieee-be"` for big endian.