thanks a lot . cheers Johnson
On Sun, Sep 6, 2009 at 4:23 PM, Kent Johnson <ken...@tds.net> wrote: > On Sat, Sep 5, 2009 at 10:52 AM, Jojo Mwebaze <jojo.mweb...@gmail.com> > wrote: > > oooh that will be helpful, kindly point me to how i can begin with > getting > > a sub-image that has the same width as the > > original. That will be my starting point. > > I don't know the details of FITS format, but I imagine it would be > something like this: > - read enough of the FITS header to figure out where the image data is > in the file > - seek to the start of the sub-image and read the image data > - construct a new header for the sub-image > - write the new header and data to a new file > > This will require some understanding of FITS format, or a library that > supports the operations you need. You might find code in PyFITS that > will help. > > Kent >
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