rtsEnviLoadImage.m
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function [image, header] = rtsEnviLoadImage(filename, headername)
%enter the file name (no .hdr extension)
header_file = headername;
header = rtsEnviLoadHeader(header_file);
if strcmp(header.interleave, 'bsq') == 1
image = zeros(header.samples, header.lines, header.bands);
end
if strcmp(header.interleave, 'bip') == 1
image = zeros(header.bands, header.samples, header.lines);
end
if strcmp(header.interleave, 'bil') == 1
image = zeros(header.samples, header.bands, header.lines);
end
file_bytes = header.samples*header.lines*header.bands;
%check to make sure there is enough memory available
if ispc
[~, sys] = memory;
if sys.PhysicalMemory.Available < file_bytes*header.data_type && strcmp(header.interleave, 'bsq') == 0
strResponse = input('The data set will require virtual memory for permutation. Continue? (y/n) ', 's');
if strcmp(strResponse, 'n') == 1
return;
end
end
else
disp('Sorry, I can''t check available memory for this OS. Keep your fingers crossed!');
end
fid = fopen(filename);
%skip the header - start reading header_offset bytes from the beginning
fseek(fid, header.header_offset, 'bof');
%read the data
image(:) = fread(fid, file_bytes, 'float32');
if strcmp(header.interleave, 'bip') == 1
image = permute(image, [2 3 1]);
end
if strcmp(header.interleave, 'bil') == 1
image = permute(image, [1 3 2]);
end