PIL is an excellent image processing library, but unfortunatly not a tool of choice when you want to deal with EXIF data seriously.<br><br>It only extracts a subset of the EXIF-Data contained in an image, for a more complete library you may want to check pyexiv2 (python wrapper for exiv2).<br>
<br>And beware, EXIF (as well as other metadata standards like IPTC) is full of "dead tags" that are only written by some exotic image processing applications or camera models.<br><br>In your special case ("finding a title for a photo"), I'd resort to IPTC:Caption - this is where Photoshop/Lightroom/Google Picasa and many other image processing apps store "title" information.<br>
<br>Franz<br><br><div class="gmail_quote">2009/5/22 Luke Hutscal <span dir="ltr"><<a href="mailto:luke@liftinteractive.com">luke@liftinteractive.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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I am currently working on a Django application that stores photos as users upload them.</p>
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One of the cooler features that we'd like to add is automatic EXIF reading - so instead of users having to go through and update their photo's information again after uploading them, the EXIF data on the uploaded photos can get automatically read into certain fields - title, caption, and so on.</p>
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I have been using the Image._getexif() method to retrieve the EXIF data for the photos that are being uploaded - but it seems that the "title" attribute is missing. Here's an example of what _getexif() returns:</p>
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</p><p style="margin: 0px; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-size-adjust: none; font-stretch: normal;"><a href="http://liftslice3.com/getexif.txt" target="_blank">http://liftslice3.com/getexif.txt</a></p>
<div><br></div><div>However, when I run ExifTool(<a href="http://www.sno.phy.queensu.ca/%7Ephil/exiftool/" target="_blank">http://www.sno.phy.queensu.ca/~phil/exiftool/</a>) on the image with the -d flag, this is what is output:</div>
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<br></div><div><div><a href="http://liftslice3.com/exiftool.txt" target="_blank">http://liftslice3.com/exiftool.txt</a></div><div><br></div><div>As you can see, there's definitely a title attribute present on the image in question. I took a look at the EXIF tags list at <a href="http://www.element-it.com/StandardImageTags.ASPX" target="_blank">http://www.element-it.com/StandardImageTags.ASPX</a>, and noticed that the ImageTitle EXIF tag isn't present in PIL's ExifTags.py - is there a reason for this? I tried adding a key for 0x0320 with the value "ImageTitle" to the TAGS dict, but PIL still doesn't seem to be reading the ImageTitle attribute out of my images. </div>
<div><br></div><div>Is there something I've missed that is keeping PIL from reading the title attribute?</div><div><br></div><div>Thanks,</div><div><br></div><font color="#888888"><div>Luke</div></font></div><p></p>
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