The demand side or supply side publishes most of the
merchandise information on the trading web sites manually.
Now, this product information generally is presented in free
text format or image format. Buyers seek product items in
the classified structure and then browse the related
information to assess its cost effectiveness. When the shape
information of product is very important to buyers, buyers
are inevitably wasted much time owing to the need to know
the shape of productions. For example, to kinds of furniture,
the shape of furniture is most important information that
buyers care