Access to WhatsApp images folder

I need to access in my source to the folder WhatsApp Images, but this is private of the program and I can’t access into this. I try with permissions, but I don’t know the exactly permission that i request to uso the images into the folder. For other hand, if my app and WhatsApp have the same signature, I can loging with the same user and the folders shared with my app. Can I access with somethink permission or request pemission to WhatsApp to use the folder?

You should see all your images in your photo/image gallery on your phone.
Mine are all there.
Easy to find.
Mine is categorised in the gallery as WhatsApp images