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Reading height and width of jpeg files
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16/07/2002 11:24:44
John Faithfull
Hunterian Museum, University of Glasgow,
Glasgow, Royaume Uni
 
 
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Forum:
Visual FoxPro
Catégorie:
Photos et traitement d'images
Titre:
Reading height and width of jpeg files
Divers
Thread ID:
00679153
Message ID:
00679153
Vues:
57
Hello,

I need to be able to perform calculations in Foxpro based upon the pixel height and width of jpeg images.

It looks as though Windows is perfectly capable of reading this info (eg right-clicking a jepg), so what's the easiest way of returning these values to a Foxpro program?

How should I write a function to return an unambiguous height, or width in pixels?

Would it be best to use Fopen() and parse the file header (how, exactly?), or is there a handy Windows API function which will return the numbers I need?

Thanks

John
Dr. JW Faithfull
Curator in Geology
Hunterian Museum
University of Glasgow
Glasgow G12 8QQ
Scotland
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