IPTC keyword extraction module

Hello,

I am writing a module that will extract EXIF and IPTC information out of the JPG image and create a node for each image.

One of the issue I am facing is the extraction of IPTC keywords. My keywords are like "United States", "The Netherlands", "Gran Canyon", etc ... . In other words, I have many keywords that are actually keywords phrases.

The problem is that when I extract the keywords, I get a list like:

[0]: States
[1]: Netherlands
[2]: The
[3]: Gran
[4]: United
...

This is probably related to a issue at the php iptcparse function when used as:

$iptc = iptcparse($info['APP13']);

Did somebody found a way to retrieve the keyword phrases? Is there another approach of doing this?

Thanks for any kind of help.

Yoel