def _run(self):
layer = self.buffer('layer')
image = self.buffer('image')
assert layer.padded_shape == image.padded_shape[-2:]
half_size = image.shape[-1] // 2
row_stride = image.padded_shape[-1]
slice_stride = row_stride * image.padded_shape[-2]
kernel1d = self.buffer('kernel1d')
with profile_device(self.command_queue, self.kernel_name):
self.command_queue.enqueue_kernel(
self.kernel,
[
image.buffer,
layer.buffer,
np.int32(self.polarization * slice_stride),
np.int32(row_stride),
kernel1d.buffer,
self.template.real_dtype.type(self.lm_scale),
self.template.real_dtype.type(self.lm_bias),
np.int32(half_size),
np.int32(half_size * row_stride),
self.template.real_dtype.type(half_size * self.lm_scale),
self.template.real_dtype.type(2 * self.w)
],
global_size=(accel.roundup(half_size, self.template.wgs_x),
accel.roundup(half_size, self.template.wgs_y)),
local_size=(self.template.wgs_x, self.template.wgs_y)
)
def _run(self):
if self.beam is None:
raise ValueError('Must set beam')
M = beam_covariance_sqrt(self.beam)
# Due to https://github.com/astropy/astropy/issues/1105, the determinant
# can be negative; hence, the np.abs is necessary.
amplitude = 2 * np.pi * self.beam.model.amplitude * np.abs(
np.linalg.det(M))
# CUFFT, unlikely numpy.fft, does not normalize the inverse transform.
# We fold the normalization into the amplitude
amplitude /= self.image_shape[0] * self.image_shape[1]
# The kernel has integral coordinates, which we need to convert to
# the range [-1, 1). We fold this into the matrix.
M *= np.asmatrix(
np.diag([1.0 / self.image_shape[0], 1.0 / self.image_shape[1]]))
# Compute overall matrix for the exponent
C = -2 * np.pi**2 * M.T * M
real = self.template.dtype.type
data = self.buffer('data')
with profile_device(self.command_queue, 'fourier_beam'):
self.command_queue.enqueue_kernel(
self._kernel, [
data.buffer,
np.int32(data.padded_shape[1]),
real(amplitude),
real(C[0, 0]),
real(2 * C[0, 1]),
real(C[1, 1]),
np.int32(data.shape[1]),
np.int32(data.shape[0])
],
global_size=(accel.roundup(data.shape[1], self.template.wgs_x),
accel.roundup(data.shape[0],
self.template.wgs_y)),
local_size=(self.template.wgs_x, self.template.wgs_y))
def _run(self):
if self.num_vis == 0 or self.num_sources == 0:
return
uv = self.buffer('uv')
w_plane = self.buffer('w_plane')
lmn = self.buffer('lmn')
flux = self.buffer('flux')
vis = self.buffer('vis')
weights = self.buffer('weights')
uv_scale, w_scale, w_bias = _uvw_scale_bias(self.image_parameters, self.grid_parameters)
w_bias += self._w
with profile_device(self.command_queue, 'predict'):
self.command_queue.enqueue_kernel(
self._kernel,
[
vis.buffer,
uv.buffer,
w_plane.buffer,
weights.buffer,
lmn.buffer,
flux.buffer,
np.int32(self.num_vis),
np.int32(self.num_sources),
np.int32(self.grid_parameters.fixed.oversample), np.float32(uv_scale),
np.float32(w_scale), np.float32(w_bias)
],
global_size=(accel.roundup(self.num_vis, self.template.wgs),),
local_size=(self.template.wgs,)
)
def _run(self):
data = self.buffer('data')
self.command_queue.enqueue_kernel(self.kernel,
[data.buffer, self.scale],
global_size=(roundup(
data.shape[0], self.WGS), ),
local_size=(self.WGS, ))
def _run(self):
data = self.buffer('data')
with profile_device(self.command_queue, 'scale'):
self.command_queue.enqueue_kernel(
self.kernel,
[
data.buffer,
np.int32(data.padded_shape[2]),
np.int32(data.padded_shape[1] * data.padded_shape[2]),
np.int32(data.shape[2]),
np.int32(data.shape[1]),
self.scale_factor
],
global_size=(accel.roundup(data.shape[2], self.template.wgsx),
accel.roundup(data.shape[1], self.template.wgsy)),
local_size=(self.template.wgsx, self.template.wgsy)
)
def _run(self):
grid = self.buffer('grid')
sums = self.buffer('sums')
self.command_queue.enqueue_zero_buffer(sums.buffer)
with profile_device(self.command_queue, 'mean_weight'):
self.command_queue.enqueue_kernel(
self._kernel, [
sums.buffer, grid.buffer,
np.int32(grid.padded_shape[-1]),
np.int32(grid.shape[2]),
np.int32(grid.shape[1])
],
global_size=(accel.roundup(grid.shape[2], self.template.wgs_x),
accel.roundup(grid.shape[1],
self.template.wgs_y)),
local_size=(self.template.wgs_x, self.template.wgs_y))
sums.get(self.command_queue, self._sums_host)
return self._sums_host[1] / self._sums_host[0]
def __call__(self, pos, psf_patch, **kwargs):
"""Execute the operation.
Parameters
----------
pos : tuple
row, col in image at which to center the PSF
psf_patch : tuple
num_polarizations, height, width of central area of PSF to subtract
(num_polarizations is ignored)
"""
self.bind(**kwargs)
self.ensure_all_bound()
dirty = self.buffer('dirty')
model = self.buffer('model')
psf = self.buffer('psf')
psf_y = psf.shape[1] // 2 - psf_patch[1] // 2
psf_x = psf.shape[2] // 2 - psf_patch[2] // 2
psf_addr_offset = psf_y * psf.padded_shape[2] + psf_x
with profile_device(self.command_queue, 'subtract_psf'):
self.command_queue.enqueue_kernel(
self.kernel, [
dirty.buffer, model.buffer,
np.int32(dirty.padded_shape[2]),
np.int32(dirty.padded_shape[1] * dirty.padded_shape[2]),
np.int32(dirty.shape[2]),
np.int32(dirty.shape[1]), psf.buffer,
np.int32(psf.padded_shape[2]),
np.int32(psf.padded_shape[1] * psf.padded_shape[2]),
np.int32(psf_patch[2]),
np.int32(psf_patch[1]),
np.int32(psf_addr_offset),
self.buffer('peak_pixel').buffer,
np.int32(pos[1]),
np.int32(pos[0]),
np.int32(pos[1] - psf_patch[2] // 2),
np.int32(pos[0] - psf_patch[1] // 2),
np.float32(self.loop_gain)
],
global_size=(accel.roundup(psf_patch[2], self.template.wgsx),
accel.roundup(psf_patch[1], self.template.wgsy)),
local_size=(self.template.wgsx, self.template.wgsy))
def _run(self):
data = self.buffer('data')
beam_power = self.buffer('beam_power')
with profile_device(self.command_queue, 'apply_primary_beam'):
self.command_queue.enqueue_kernel(
self.kernel,
[
data.buffer,
beam_power.buffer,
np.int32(data.padded_shape[2]),
np.int32(data.padded_shape[1] * data.padded_shape[2]),
np.int32(data.shape[2]),
np.int32(data.shape[1]),
data.dtype.type(self.threshold),
data.dtype.type(self.replacement)
],
global_size=(accel.roundup(data.shape[2], self.template.wgsx),
accel.roundup(data.shape[1], self.template.wgsy)),
local_size=(self.template.wgsx, self.template.wgsy)
)
def _run(self):
src = self.buffer('src')
dest = self.buffer('dest')
with profile_device(self.command_queue, 'add_image'):
self.command_queue.enqueue_kernel(
self.kernel,
[
dest.buffer,
src.buffer,
np.int32(dest.padded_shape[2]),
np.int32(dest.padded_shape[1] * dest.padded_shape[2]),
np.int32(src.padded_shape[2]),
np.int32(src.padded_shape[1] * src.padded_shape[2]),
np.int32(src.shape[2]),
np.int32(src.shape[1])
],
global_size=(accel.roundup(src.shape[2], self.template.wgsx),
accel.roundup(src.shape[1], self.template.wgsy)),
local_size=(self.template.wgsx, self.template.wgsy)
)
def _run(self):
grid = self.buffer('grid')
sums = self.buffer('sums')
sums.zero(self.command_queue)
with profile_device(self.command_queue, 'density_weights'):
self.command_queue.enqueue_kernel(
self._kernel, [
sums.buffer, grid.buffer,
np.int32(grid.padded_shape[2]),
np.int32(grid.padded_shape[1] * grid.padded_shape[2]),
np.int32(grid.shape[2]),
np.int32(grid.shape[1]),
np.float32(self.a),
np.float32(self.b)
],
global_size=(accel.roundup(grid.shape[2], self.template.wgs_x),
accel.roundup(grid.shape[1],
self.template.wgs_y)),
local_size=(self.template.wgs_x, self.template.wgs_y))
sums.get(self.command_queue, self._sums_host)
rms = np.sqrt(self._sums_host[2]) / self._sums_host[1]
return rms, rms * np.sqrt(self._sums_host[0])
def _run(self):
dirty = self.buffer('dirty')
tile_max = self.buffer('tile_max')
tile_pos = self.buffer('tile_pos')
with profile_device(self.command_queue, 'find_peak'):
self.command_queue.enqueue_kernel(
self.kernel, [
dirty.buffer,
np.int32(dirty.padded_shape[2]),
np.int32(dirty.padded_shape[1] * dirty.padded_shape[2]),
tile_max.buffer, tile_pos.buffer,
np.int32(tile_max.padded_shape[1]),
np.int32(tile_max.shape[1]),
np.int32(tile_max.shape[0]),
self.buffer('peak_value').buffer,
self.buffer('peak_pos').buffer,
self.buffer('peak_pixel').buffer
],
global_size=(accel.roundup(tile_max.shape[0],
self.template.wgsx),
accel.roundup(tile_max.shape[1],
self.template.wgsy)),
local_size=(self.template.wgsx, self.template.wgsy))
def _run(self):
grid = self.buffer('grid')
uv = self.buffer('uv')
weights = self.buffer('weights')
half_v = grid.shape[1] // 2
half_u = grid.shape[2] // 2
address_bias = half_v * grid.padded_shape[2] + half_u
with profile_device(self.command_queue, 'grid_weights'):
self.command_queue.enqueue_kernel(self._kernel, [
grid.buffer,
np.int32(grid.padded_shape[2]),
np.int32(grid.padded_shape[1] * grid.padded_shape[2]),
uv.buffer, weights.buffer,
np.int32(address_bias),
np.int32(self._num_vis)
],
global_size=(accel.roundup(
self._num_vis,
self.template.wgs), ),
local_size=(self.template.wgs, ))