Fresnel and Fraunhofer beam propagator with a test routine about odak

[askaradeniz]

Thanks for adding this feature.

Another example result of Fresnel propagation:

Initial field:

Propagated field:

Reconstructed field:

However, I had to flip the image vertically to get the results in the right direction. I read the image with opencv and set the sample field as the following.

img = cv2.imread("0886.png")
sample_field[:,:] = img[::-1,:,0]

[kaanaksit]

This means I can close the issue.

[kaanaksit]

@askaradeniz I forgot to mention about this. Odak has also built-in toolkit for basic operations such as loading an image: https://github.com/kunguz/odak/blob/master/odak/tools/file.py#L59