How to call Point2f in the python transform

[Nacho Sanguinetti]

So, I just started working with Bonsai for a couple of projects and I'm still in the weeds regarding all the different languages involved (having had Null previous experience with any of them). 

I'm tracking 2 different animals at the same time. They can be in or out of the frame, their choice. So I use their different sizes to choose which one is which and I have the centroids for both animals. The result of this centroids is either a point in the image or a (n. def., n. def.). Now I want to plot online the trajectories of both animals on top of the same image. So I ziped both centroids and the Image and I adapted a python transform written by gonzalo in a different Forum thread. I am able to plot both trajectories BUT I get an artifact with the (n. def., n. def.). In this cases the python script reads the n. def., n.def. as 0,0. I want to script a condition to IF these points out. But I haven't been able to access the actual centroid  Point2f values (Point2f is not callable). I tried looking around but haven't found the right answer. 

I need something of the sort of

If centroid is (n. def., n. def)    or  If centroid is a float

      nothing

else

      track

Probably one of you knows how to solve this silly question.

Best

Nacho

[goncaloclopes]

If I got this problem correctly, maybe something like this script would work?

import clr
clr.AddReference("OpenCV.Net")
from OpenCV.Net import *
from math import isnan

@returns(Point2f)
def process(value):
  if isnan(value.X) or isnan(value.Y):
    # not defined value
    return Point2f(0,0)
  else:
    # defined value
    return value

Let me know if this is in the direction of what you are looking for.

Cheers,

[Nacho Sanguinetti]

Solved! :) Now i can track a Shrew and a cricket online :)