What Happens If I Stop On A Crosswalk?

Question from a reader: What happens if the light just turned yellow and I chose to stop, but stopped with my front tires on the first limit lines of the crosswalk? Thereafter, when the traffic light turned red. I proceeded to back up a little bit. Was the photo captured? Am I at fault? I receive this question from readers about once per week. 

Answer: No you should not get a ticket.
yellow light