Odoo8 support some default barcode image creation using below syntax,
<img t-att-src="'/report/barcode/?type=%s&value=%s&width=%s&height=%s&humanreadable=%s' % (EAN13, 5412569874501, 200, 80,1)"/>
but when I passing UPCE as barcode type and 8 digits number it will not show any output. Any suggestions about UPC-E barcode image generation will be strongly appreciated.