Pitch angle does effect the stall speed.
An aircraft with a (steady) pitch angle of 90° has a stall speed of zero, as the wings aren't providing lift.
The question is impossible to answer, as the stall speed varies with the load factor (the positive g load) and an instantanious picture of the aircraft can't tell you that.
If the aircraft was in a steady 20° pitch up climb, 45° AoB turn, then you could find an answer, however I doubt if that is the case here!
[This message has been edited by Checkboard (edited 22 September 2000).]