Camera :IPHONE 4
Res: 1920*1200
Image coordinate:
left upper corner:(0,0)
right lower corner:(1920,1200)
Experiment Data:
In First Image, the near point A(848,698), the far point B(895,955);
In Second Image, the near point A'(472,705), the far point B'(730,958).
delta A=(-376,7);
delta B=(-165,3);
Along Y axis, it changes a little. (no change. 7 or 3, compared to 1920*1200, actually is Zero.)
Along X axis, it changes 1:2=165:376.
Because I preset the two X placed as below:
X----X----Camera: distance is: 1:1
So in image coordinate, the changes are 1:2.
Translation succeeds. :)