This is a very simple and straightforward implementation of PDE-based inpainting
with the Laplacian. You have to provide 2 images:

1. An image containing the sought pixel values at the desired pixel locations
(other pixel will be ignored).
2. An image mask where non-zero pixel values indicate the pixel values to be
used. If the non-zero values are different from 1.0, then they are used as
weights that state the importance of that pixel (0 = not important,
1 = important).

NOTE: This implementation expects single channel grey value images!