How to load images in MoI (jpg,png jpeg format...)

 From:  GJL
7476.1 
As noted in title, im a new of MoI, i dont know how to load image when establishing the modelling references,
I checked the button of File/import, but there is no option of some common image formats (jpg,png jpeg format...)
anyone know the solution to this? Thx a lot for help!!!