Does anyone know how to extract the embedded preview image from a .jpg
file?
I would like to import the extracted images into a castLib, instead of
resampling the files and then importing them.
Would this be faster? I think so , as my app wouldn't have to load the
high res file into memory before resampling.
Any info on how to achieve this and what tools/3rd party software
required would be gratefully accepted.

Thanks
Mark Stevens