Write Radiance high dynamic range (HDR) image file
hdrwrite(hdr, filename) creates
a Radiance high dynamic range (HDR) image file from HDR, a single-
or double-precision high dynamic range RGB image. The HDR file with
filename uses run-length encoding to minimize
Read a high dynamic range image into the workspace.
hdr = hdrread('office.hdr');
Create a new HDR file, writing the high dynamic range data,
hdr, to a file with a new filename.