I’m playing with self-contained vcards (with all the data in the vcard, not involving a URL) with my name, phone number, email and a photo. Turns out, the photo really isn’t too bad for the purpose of sticking a small image next to an entry in a cellphone address book. It takes a while to find the right crop, size and JPEG compression, but the result is surprisingly good.
Here for instance, my vcard, with my ugly mush in 40x40 and 524 bytes:
BEGIN:VCARD
VERSION:2.1
N:Noname;Rosco
TEL:+123 45 678 9012
EMAIL:foo@bar.com
PHOTO;ENCODING=BASE64;TYPE=JPEG:/9j/4AAQSkZJRgABAQEBLAEsAAD/2wBDAAsHCAkIB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END:VCARD
It fills a NTAG 216 almost to the brim, but it works. However, I noticed that if I put a photo AND a URL, Android freezes when it reads the tag 