Getting Path To Uploaded Attachment Image After Upload

After you have uploaded an attachment in WordPress using the media upload screen, is there a hook or filter I can run after the image has been uploaded where I can get the path to the uploaded image so I can analyse it?

I am building a plugin that will analyse an image after it has been uploaded and then tag the image with the average colour it finds in the image. The only problem is I don’t know what hook I can use that will fire right after the image has uploaded and then a way I can get the path to the newly uploaded file.

Any help would be gratefully appreciated.

Turns out I solved my own question with help from a colleague. The two filters that get called after media is uploaded or when media is being edited are; ‘add_attachment’ and ‘edit_attachment’. Here is the code I am using, I then check to see if the attachment is an image (code omitted from example).

function analyse_attachment($attachment_ID)
{          
    $attachment = get_attached_file($attachment_ID); // Gets path to attachment
    update_post_meta($attachment_ID, "image_rgb", $the_colour);
}

add_action("add_attachment", 'analyse_attachment');
add_action("edit_attachment", 'analyse_attachment');

Obviously I’ve omitted some stuff that isn’t relevant to the question. But that code gets called right after you’ve uploaded or edited an attachment.