is is an updated thread catering to this question for Odoo 8.0. The original 7.0 thread was getting a little chaotic so I decided to create a new thread for the question.

If you would like to add an image to the tree view on the sales order line or quotation line, please install the following module (instructions on Github in README):

https://github.com/OdooCommunityWidgets/web_tree_image_order_line 

I've simply ported Stefan's original work for 7.0 to make it 8.0-compatible. He has also built another module to support the image in tree view here:

https://github.com/OCA/web/tree/8.0/web_tree_image

The OdooCommunityWidgets module is dependant on the OCA module to function correctly. Please make sure you install both.

Here's a link to the original question:

 
https://www.odoo.com/forum/help-1/question/odoo-7-how-can-i-add-images-in-sale-oder-line-or-in-treeview-generally-483

here's the question content:.

"By 

Stefan Reisich 

 on 2/8/13, 9:39 PM

how can I add small images in sale.order.line in OpenERP 7 web client? So that each product in orders or quotations has as small image.

Thank you very much."