recolo.artificial_grid_deformation.grid.dotted_grid

recolo.artificial_grid_deformation.grid.dotted_grid(xs, ys, pitch, pixel_size=1, oversampling=1, noise_std=None)

Generate a grid image. The gray scale values of the grid is given by:

g(x,y) = 0.5 * (2. + cos(2. * pi * x / pitch) + cos(2. * pi * y / pitch))

xsndarray: The x-coordinates of the pixels in physical units
ysndarray: The y-coordinates of the pixels in physical units
pitchfloat: The grid pitch in pixels
pixel_sizefloat: The size of a pixel in physical units
oversamplingint: Additional oversampling to reduce sampling artefacts of the grid.
noise_stdfloat: The standard deviation of the additive gaussian noise