display_quiver
Arguments:
- _size_factor>0,_arrow_size>=0,_color_mode={ 0=monochrome | 1=grayscale | 2=color }
Description:
Render selected images of 2D vectors as a field of 2D arrows.
(equivalent to shortcut command dq).
Default values:
size_factor=16, arrow_size=1.5 and color_mode=1.
Example of use:
$ gmic
image.jpg +luminance gradient[-1] xy rv[-2,-1] *[-2] -1 a[-2,-1] c crop 60,10,90,30 +display_quiver[1] ,

Command:
image.jpg +luminance gradient[-1] xy rv[-2,-1] *[-2] -1 a[-2,-1] c crop 60,10,90,30 +display_quiver[1] ,

Command:
image.jpg +luminance gradient[-1] xy rv[-2,-1] *[-2] -1 a[-2,-1] c crop 60,10,90,30 +display_quiver[1] ,

Command:
image.jpg +luminance gradient[-1] xy rv[-2,-1] *[-2] -1 a[-2,-1] c crop 60,10,90,30 +display_quiver[1] ,