I am not sure where you want to render the image path but i guess if you include this:
will give you the correct link to the image. If you need to include the href attribute on the img tag try this:
Is this what you want??

Olsen, I already tried that before and it does not render anything.... The $this->item->image; is not a global variable, so I can't access to it in my joomla template index.php (the file where I need to print img)... I actually tried with $jinput, nothing works... Since that k2 item has 4 different images (XS, S, L, XL), I also tried with JURI::base(), but only prints the word "IMAGE" in hash method... So, I am too messy now to think in a best solution... :side:

But where do you want to call the image path? Isnt the K2 template?

Nop, it's in a module with php, to put the image as header.
I already tried to put it in my joomla template, getting Fatal Error in 2 ways. Fatal error: Using $this when not in object context

Try using the K2 Content module.

Otherwise you will have to develop a module from scratch, query the DB ... you get the picture.

I already tried to copy variables of mod_k2_content, nothing happened.
I guess that I have less time spended if I just turn $this->Item->image; into a global and them use it in my custom module... or just copy part of mod_k2_content helper.php to get instance. Just a litle blinded right now.

Try with the default template of K2 content and only return the image.
You can choose a specific item's image as well.

Then you can override that template to fit your needs.

Yes, it's a good way to get that, sweet idea coming from heaven. :) Not what I expected, but will works nicely.

I 'm glad I could help you :)