> I put Scan option for jpg, jpeg, but the software still 
> scan all files.

Use filters, such as:
-* +www.yoursite.com/*.html +*.jpg +*.jpeg

Note: change the .html extension depending on the html page 
names, such as
-* +www.yoursite.com/*.php +*.jpg +*.jpeg

(and of course, use the real sitename instead of 
www.yoursite.com)