Can the motion of an object be measured just by looking at it?

What a strange question! Motion cannot be measured. You can only measure Speed or Velocity, or Acceleration , or Distance travelled. Speed is a measure that relates Distance travelled in a particular Time. It is very easy to look at a moving object, but you cannot expect to have a brain which tells you precisely how far the object moved, just by looking at it. Perhaps you have been reading too many Science Fiction Novels lately!