Is viewing pictures of Chometz allowed on Pesach? To be more specific this would be in reference to an article or event.
Absolutely not assur. In fact seeing actual chometz is not assur either.
The difference between viewing chometz and smelling chometz is whether you get a benefit from it or not. As people, in general, don't get a benefit of seeing a picture of a loaf of bread, this should not be a problem. On the other hand, there IS a concept of getting a benefit from smelling (for example, making a blessing on the spices during havdalah and taking a whiff). If you happen to pass by a bakery by accident (or there is no other alternative than passing said bakery on the way to home or shul) and you get a whiff of bread, there shouldn't be a problem. But if you walk to a bakery to take in the smells, you might be violating a rabbinical ruling, in that you're getting a benefit from smelling bread on Pesach.