[Tutor] how to read and transmit/send only section of the image (sub-image)

[Jojo Mwebaze]

thanks a lot .
cheers

Johnson



On Sun, Sep 6, 2009 at 4:23 PM, Kent Johnson <kent37 at tds.net> wrote:

> On Sat, Sep 5, 2009 at 10:52 AM, Jojo Mwebaze <jojo.mwebaze at 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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