laserbeamsize 1.1.0

ISO 11146 Calculation of Laser Beam Center and Diameter

Simple and fast calculation of beam sizes from a single monochrome image based on the ISO 11146 method of variances. Some effort has been made to make the algorithm less sensitive to background offset and noise.

Installation

Just use pip:

pip install laserbeamsize

Usage

Finding the center and dimensions of a good beam image:

import imageio
import laserbeamsize as lbs

beam = imageio.imread("t-hene.pgm")
x, y, dx, dy, phi = lbs.beam_size(beam)

print("The image center is at (%g, %g)" % (x,y))
print("The horizontal width is %.1f pixels" % dx)
print("The vertical height is %.1f pixels" % dy)
print("The beam oval is rotated is %.1f°" % (phi*180/3.1416))

Handling non-zero backgrounds and other issues are explained in Jupyter notebooks at <https://laserbeamsize.readthedocs.io>

Source code repository

Source is hosted by github:

<https://github.com/scottprahl/laserbeamsize>

License

laserbeamsize is licensed under the terms of the MIT license.