How to use Matlab to get georeferencing information of a JP2 image?

I request you to kindly let me know how to extract with Matlab the georeferencing information of a JP2 image?

I'd like to read with Matlab the georeferencing metadata contained in a JP2 image.

Thanks for kind cooperation.

Devendra

Answer 1

[Walter Roberson]

You need to run an external program that reads EXIF information from the file... and hope that the information is recorded in the EXIF tags.

See https://www.mathworks.com/matlabcentral/fileexchange/42000-run_exiftool

[Devendra]

I am using following matlab lines to write envi file.

fname = string(img_names) + '_' + '6Bands.dat'

disp(fname);

function i=enviwrite(stacked_image,fname);

end

function i=enviwrite(image,fname);

However, it is giving following errors

Error: File: ds_layer_stack.m Line: 35 Column: 4

Function definitions are not supported in this context. Functions can only be created as local or nested functions in code files.

I do not understand it as I have recently switched on to matlab from envi+idl. Kindly suggest me how to use enviwrite function.

Devendra

[Walter Roberson]

   fname = string(img_names) + '_' + '6Bands.dat'
   enviwrite(stacked_image,fname);
end

However, the built-in enviwrite() only works with hypercube objects.

If you use the enviwrite() from github, you will need to modify it to accept coordinate information. In such a case you would invoke it something like

   fname = string(img_names) + '_' + '6Bands.dat'
   coordinate_information = %appropriate stuff here
   custom_enviwrite(stacked_image, fname, coordinate_information);
end

[Devendra]

Thanks for your help. However please let me know how to get Coordinate_information from jp2 images. Deva

[Walter Roberson]

You need to run an external program that reads EXIF information from the file... and hope that the information is recorded in the EXIF tags.

imfinfo is not documented as being able to read EXIF information from JPEG2000 images (only from JPEG images)