Use Image::Info to get the EXIF data, it is pretty simple to use and you don't need to read the standards. 

use Image::Info qw(image_info);

my $width = image_info($_)->{width};
my $height = image_info($_)->{height};
print "$_\twidth = $width\theight = $height\n";

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In reply to Re: finding jpeg pixel size by terra incognita
in thread finding jpeg pixel size by milt95033

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