Default image dispaly in all node type

I created a view page to display some content type like
Document , files , pictures.
I set for every content a default image image , but when i create view and i add field Image_field the default image is showing in document and file too not only in pictures node.
how can i make the default image display only in node picture and the default image of document display only in document and the default image of file dispaly only in file node.

thank you