ENVI file reader, updated 2/9/2010

Read ENVI raster files. Supports all interleaves, data types (except complex) and byte orders.

Description

I = ENVIREAD(FILENAME) Reads an ENVI binary file into an array using the information from the corresponding header file FILENAME.hdr. The output structure I contains fields I.x, I.y, I.z and I.info containing the x-coordinate vector, y-coordinate vector, images data and header info, respectively. I.z will be in whatever number format (double, int, etc.) as in the envi file.

I= ENVIREAD(FILENAME,HEADERFILE); Uses the header information in headerfile.
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Thanks to Yushin Ahn for his modifications.
NOTES:
-Geo-registration does not currently support rotated images.
- No support for importing complex data .

• Acknowledgements: This submission has inspired the following:; ENVI file reader/writer, geotiff reader
• MATLAB release: MATLAB 7.2 (R2006a)

[Ian Howat]

Notice (7/19/2007) There's a bug in the current version that keeps it from loading 1-band images correctly. I've uploaded an update, so you'll want to wait and download when the system posts the revised version on 7/20/2007.

[Ian Howat]

If the map/image coordinates in the map info in the header are not the upper left corner (1.5,1.5), the program will not create the correct X Y vectors. I've uploaded a fix for this.

[Cuneyt Utku]

Very useful. Code is easy to follow.
I downloaded it on Jan 18, 2008. It is version 1, dated 11-Jul-2007 and apparently still has the bugs mentioned above.

[Carlos Esquerre]

It works pretty good. I made a small modification to read files without geographical information since I work with hyperspectral image of mushrooms.

[Niek Sanders]

To make enviread play nice with files lacking geolocation, I had to modify line 38 to be:

if isfield(info,'map_info') && ...
   isfield(info.map_info,'mapx') && isfield(info.map_info,'mapy')

Note the first isfield() to check if the datastructure even exists.

[Niek Sanders]

 

[Niek Sanders]

 

[Jaroslaw Tuszynski]

A better option is to use MATLAB's multibandread function