how do I convert a point in an image to standard co-ordinate in python

Question

Hi,

I have modified python sandbox to detect vertical lines, now trying to convert a point in the image to standard co-ordinates.

I have looked at the code for the C++ and expected to use

x, y = jevois.imgToStd(x1,y1,image)

where x1,y1 is the start point of a line and image is the default image size

I have also tried

width = image.shape[0]

height = image.shape[1]

x, y =jevois.imgToStd(x1,y1, width, height, 0.2)

whatever I try I get an error python arguements does not match C++ signature

Have tried adding float(x1) etc and various other combinations.

has anyone got a simple example they could show, at the moment I can't see the wood for the trees!

thanks

Steve

Answer 1

good question, we are looking into this, the problem likely comes from the way we pass x and y read-write (as non-const references) which Python cannot do.

In the meantime, I would recommend just implementing your own img2std in python: the code/formula is here:

http://jevois.org/doc/Coordinates_8C_source.html

and JEVOIS_CAMERA_ASPECT is (4.0 / 3.0)