The HDF_DF24_GETINFO procedure retrieves information about the current 24-bit HDF image.
HDF_DF24_GETINFO, Filename, Width, Height, Interlace
A string containing the name of the file to be read.
A named variable in which the width of the image is returned.
A named variable in which the height of the image is returned.
A named variable in which the interface method is returned. The returned value is 0 for pixel interlacing, 1 for scan-line interlacing, and 2 for scan-plane interlacing.
None
; Open the file myhdf.hdf:
h = HDF_OPEN('myhdf.hdf')
; Return information about the 24-bit image:
HDF_DF24_GETINFO, 'myhdf.hdf', width, height, interlace
; Print information about the returned variables:
HELP, width, height, interlace
HDF_CLOSE('myhdf.hdf') ; Close the HDF file.
If the image were 536 by 412 pixels, and scan-line interlaced, IDL would print:
WIDTH LONG = 536
HEIGHT LONG = 412
INTERLACE LONG = 1
Example Code: For a more detailed example, see the file hdf_info.pro, located in the examples/doc/sdf subdirectory of the IDL distribution. Run the example procedure by entering hdf_info at the IDL command prompt or view the file in an IDL Editor window by entering .EDIT hdf_info.pro.
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4.0 |
Introduced |
HDF_DF24_GETIMAGE, HDF_DF24_LASTREF, HDF_DF24_NIMAGES, HDF_DF24_READREF, HDF_DF24_RESTART