one question

[wushilian]

control points. shape [num_batch, nx*ny, 2]. If the value of control points is between 0 and 1? And (0,0) point is the upper left corner of the image or the center of image

[DominikLorenz]

The x and y values of the control points are between -1 and 1. (0,0) is the center of the image.

[dp-isi]

what the value of t_ indicates is it relative position of src control points or absolute position? the example of spline2 function given the logic goes with relative coordinate concept but then if i give t_ as all 0 then the src image should be intact after transformation but its not coming according to this concept. please help .