image_rsexecute_map_workflow

image_rsexecute_map_workflow(im, imfunction, facets=1, overlap=0, taper=None, **kwargs)

Apply a function across an image: scattering to subimages, applying the function, and then gathering

Parameters:

• im – Image to be processed

• imfunction – Function to be applied

• facets – See image_scatter_facets

• overlap – image_scatter_facets

• taper – image_scatter_facets

• kwargs – kwargs for imfunction

Returns:

graph for output image

For example:

rsexecute.set_client(use_dask=True)
model = create_test_image(frequency=frequency, phasecentre=phasecentre, cellsize=0.001,
                                 polarisation_frame=PolarisationFrame('stokesI'))
def imagerooter(im, **kwargs):
    im["pixels"].data = numpy.sqrt(numpy.abs(im["pixels"].data))
    return im
root_graph = image_rsexecute_map_workflow(model, imagerooter, facets=16)
root_image = rsexecute.compute(root_graph, sync=True)