Re: Extracting Exif data and thumbnails from image files -- RPG400-L

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David

Thanks to some help given to me some time ago, I can read the IFS with RPG and display JPG and GIF images sizes for each file. I would also like to display the thumbnails when over a browser. Can someone please tell where to find the layout of the various image files and also how to retrieve the thumbnail .
Information about exif can be found at http://www.exif.org.

Many thanks - I had forgotten this - will investigate.

Thumbnails can't be 'extracted', as far as I know ...

I thought that I had read that they are stored in the header of the image file but I cannot remember where!

you have to create
your own smaller sized version of the image.   I'm not sure you could do
it easily in RPG, although I suspect there are a number of C libraries
you could investigate porting that should be easy enough to call or bind.

I think that it would be too slow do create them repeatedly on the fly. I already have ceated my own in IrfanView in batch on my PC and stored them in the IFS, but wondered if this was unnecessary step.

Best wishes

Rob

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