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matlab/enviSaveRaw.m 1.97 KB
718ee79b   David Mayerich   updated comments ...
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  %saves an ENVI file without any manipulation, assumes (X, Y, S)
35a7195f   David Mayerich   added median spec...
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  % enviSaveRaw(M, filename, headername)
abdb93f5   David Mayerich   added code for sa...
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  function enviSaveRaw(M, filename, headername)
  
      %if a header isn't provided, assume it's just the filename
          % with '.hdr' added to the end
      if nargin == 2
          headername = [filename '.hdr'];
      end
  
      %open a file for writing
      fid = fopen(filename, 'w');
      
      %write the data to disk
      fwrite(fid, M, class(M));
      
      %close the file
      fclose(fid);
      
      %open a header file for writing
      fid = fopen(headername, 'w');
      fprintf(fid, 'ENVI\n');
      fprintf(fid, 'description = {}\n');
      fprintf(fid, 'samples = %d\n', size(M, 1));
      fprintf(fid, 'lines = %d\n', size(M, 2));
      fprintf(fid, 'bands = %d\n', size(M, 3));
      fprintf(fid, 'header offset = 0\n');
      fprintf(fid, 'file type = ENVI Standard\n');
      
      %get a string representing the matlab data type
      matlab_real = isreal(M);
      
      if(isa(M, 'uchar'))
          envi_type = 1;
      elseif(isa(M, 'short'))
          envi_type = 2;
      elseif(isa(M, 'int'))
          envi_type = 3;
      elseif(isa(M, 'single') && matlab_real)
          envi_type = 4;
      elseif(isa(M, 'double') && matlab_real)
          envi_type = 5;
      elseif(isa(M, 'single') && ~matlab_real)
          envi_type = 6;
      elseif(isa(M, 'double') && ~matlab_real)
          envi_type = 9;
      elseif(isa(M, 'ushort'))
          envi_type = 12;
      elseif(isa(M, 'ulong'))
          envi_type = 13;
      elseif(isa(M, 'int64'))
          envi_type = 14;
      elseif(isa(M, 'uint64'))
          envi_type = 15;
      end
      
      fprintf(fid, 'data type = %d\n', envi_type);
      
      fprintf(fid, 'interleave = bsq\n');
      fprintf(fid, 'sensor type = Unknown\n');
      fprintf(fid, 'byte order = 0\n');
      fprintf(fid, 'x start = 0\n');
      fprintf(fid, 'y start = 0\n');
      fprintf(fid, 'wavelength units = Unknown\n');
      fprintf(fid, 'z plot titles = {Unknown, Unknown}\n');
      fprintf(fid, 'pixel size = {1, 1, units=Meters}\n');
      fclose(fid);