Jouke has asked for the wisdom of the Perl Monks concerning the following question:

After a reply on my question of yesterday (Resizing images && Tk), which suggested to use GD generated data in Tk::Photo objects, I started fiddling with the data() method of Tk::Photo (and its companion  -data => $imagedata)

I can't figure out what kind of data this method returns. Probably it's a packed or unpacked set of raw imagedata. The data generated by Tk::Photo->data(-format => 'jpeg') is a little bit more than 6 times larger than the data generated by  GD::Image->jpeg(). This 'little bit' could be explained by the identifier-string that's included in the image-data of a JPG.

Does anyone know how to convert between the data generated by these two methods?

Jouke Visser, Perl 'Adept'