You don't understand his point. He states "Each pixel column is a specific point in time." He's saying you can observe when the BACK of the wheel crosses the to

You don't understand his point. He states "Each pixel column is a specific point in time." He's saying you can observe when the BACK of the wheel crosses the too-early "camera line" and determine the winner. Unfortunately this isn't true if the camera line is not parallel to the finish line, which it probably was not.