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Technical Documents

ISIS 3 Application Documentation


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Import HRSC image

Overview Parameters Example 1


This program imports Mars Express HRSC files. This works by first determining whether or not the input file has prefix data. If there is prefix data, the prefix data is collected and used to look for "gaps" - HRSC files can give us a time and exposure duration for each line, we look for where the time + exposure duration =/= next line's time. We populate a table (LineScanTimes) with the prefix data and lineInFile with whether or not a gap should be inserted. For all files, we now process the data and if there were gaps, they will be put in their proper places. This is a two-pass system for files with prefix data, one-pass for files without. The Isis2 equivalent to this program is mex2isis.pl. It is worth noting that regardless of the input file's byte order, the prefix data byte order is always LSB.


Related Applications to Previous Versions of ISIS

This program replaces the following applications existing in previous versions of ISIS:
  • mex2isis.pl
  • readpfx


Steven Lambright2008-01-16 Original version
Christopher Austin2008-03-18 Checks if input file is rdr based on whether or not the input file has prefix data.
Steven Lambright2008-05-13 Removed references to CubeInfo
Steven Lambright2008-07-28 Updated to support the HRSC camera model. The Kernels group now has the IK code properly added, the summing keyword is propagated, the times table is now compressed into only having entries on time changes, and the times no longer have a 'Z' at the end of them once imported.
Adam Paquette2016-10-05 Updated the error messages thrown when hrsc2isis trys to ingest an image that is not an HRSC image, and when hrsc2isis trys to ingest a map projected image. Fixes #4259.

Parameter Groups


Name Description
FROM Input HRSC Image
TO Output Isis cube

Files: FROM


Use this parameter to select the PDS filename. This file must contain the PDS labels, however the image data can be detached and will be automatically obtained from the PDS image pointer keyword. If the pointer is incorrect then use the IMAGE parameter to specify the file containing the binary image data.

Type filename
File Mode input
Filter *.lbl *.img
Close Window

Files: TO


Use this parameter to select the output filename

Type cube
File Mode output
Filter *.cub
Close Window

Example 1

Import an HRSC image with gaps


This example covers importing an HRSC image and shows what happens when gaps are found.

Command Line

hrsc2isis from=h0279_0000_re2.img to=h0279_0000_re2.cub
Run this program on "h0279_0000_re2.img"

Input Images

Input HRSC Image

This is the raw input image, not imported with this program

This image was imported with pds2isis and then exported with isis2std, in order to get a good idea of what the raw input image looks like.

Output HRSC Gap

Input discontinuity from this example

This is a zoomed in region of what will become a gap from this example. Notice the features aren't aligned in the middle of the image, as if there are missing lines.

Output Images

Output HRSC Image

Output image from this example

This is the output from this example. The large "black" areas are NULL lines where data was missing, according to the prefix data on the raw input image.

Output HRSC Gap

A gap from this example

This is a zoomed in region of a gap from this example. Notice the features on the top and bottom would not normally line up if the gap did not exist.