alter image field from views I have a content type called Image, it has 2 fields: a image field and a copyright field (with value yes or no).  

I've created a view to display them a list. I have a requirement that if a user isn't logged in to our site (anonymous) and the value of copyright field is yes, the images in the view should have a mask added to them by default. 

If user is logged in (authenticated), the images should be displayed normally. 

Please tell me how can I do this?
You can create a template file for that image  field and there you can edit the image display as per your condition . You can get the name of the template file from your views (Theme: Information)