def test_griddata_invert_awterm(self): self.actualSetUp(zerow=False) make_pb = functools.partial(create_pb_generic, diameter=35.0, blockage=0.0, use_local=False) pb = make_pb(self.model) if self.persist: export_image_to_fits(pb, "%s/test_gridding_awterm_pb.fits" % self.dir) gcf, cf = create_awterm_convolutionfunction(self.model, make_pb=make_pb, nw=100, wstep=8.0, oversampling=16, support=32, use_aaf=True) cf_image = convert_convolutionfunction_to_image(cf) cf_image.data = numpy.real(cf_image.data) if self.persist: export_image_to_fits(cf_image, "%s/test_gridding_awterm_cf.fits" % self.dir) griddata = create_griddata_from_image(self.model, nw=100, wstep=8.0) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits( im, '%s/test_gridding_dirty_awterm.fits' % self.dir) self.check_peaks(im, 97.13240677427714)
def test_griddata_invert_aterm_noover(self): self.actualSetUp(zerow=True) make_pb = functools.partial(create_pb_generic, diameter=35.0, blockage=0.0, use_local=False) pb = make_pb(self.model) if self.persist: export_image_to_fits(pb, "%s/test_gridding_aterm_pb.fits" % self.dir) gcf, cf = create_awterm_convolutionfunction(self.model, make_pb=make_pb, nw=1, oversampling=1, support=16, use_aaf=True) griddata = create_griddata_from_image(self.model) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits( im, '%s/test_gridding_dirty_aterm_noover.fits' % self.dir) self.check_peaks(im, 97.10594988491549)
def test_griddata_invert_wterm(self): self.actualSetUp(zerow=False) gcf, cf = create_awterm_convolutionfunction(self.model, nw=100, wstep=8.0, oversampling=8, support=32, use_aaf=True) cf_image = convert_convolutionfunction_to_image(cf) cf_image.data = numpy.real(cf_image.data) if self.persist: export_image_to_fits(cf_image, "%s/test_gridding_wterm_cf.fits" % self.dir) griddata = create_griddata_from_image(self.model, nw=1) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits( im, '%s/test_gridding_dirty_wterm.fits' % self.dir) self.check_peaks(im, 97.13215242859648)
def test_griddata_invert_fast(self): self.actualSetUp(zerow=True) gcf, cf = create_box_convolutionfunction(self.model) griddata = create_griddata_from_image(self.model) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) export_image_to_fits(im, '%s/test_gridding_dirty_fast.fits' % self.dir) self.check_peaks(im, 96.74492791536595, tol=1e-7)
def test_griddata_invert_pswf_w(self): self.actualSetUp(zerow=False) gcf, cf = create_pswf_convolutionfunction(self.model, support=6, oversampling=32) griddata = create_griddata_from_image(self.model) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) export_image_to_fits(im, '%s/test_gridding_dirty_pswf_w.fits' % self.dir) self.check_peaks(im, 96.62754566597258, tol=1e-7)
def test_griddata_invert_box(self): self.actualSetUp(zerow=True) gcf, cf = create_box_convolutionfunction(self.model) griddata = create_griddata_from_image(self.model) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits(im, '%s/test_gridding_dirty_box.fits' % self.dir) self.check_peaks(im, 97.11833094588997, tol=1e-7)
def test_griddata_invert_pswf(self): self.actualSetUp(zerow=True) gcf, cf = create_pswf_convolutionfunction(self.model, support=6, oversampling=32) griddata = create_griddata_from_image(self.model) griddata, sumwt = grid_visibility_to_griddata(self.vis, griddata=griddata, cf=cf) im = fft_griddata_to_image(griddata, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits(im, '%s/test_gridding_dirty_pswf.fits' % self.dir) self.check_peaks(im, 97.00435128311616, tol=1e-7)
def test_griddata_weight(self): self.actualSetUp(zerow=True) gcf, cf = create_box_convolutionfunction(self.model) gd = create_griddata_from_image(self.model) gd_list = [grid_weight_to_griddata(self.vis, gd, cf) for i in range(10)] gd, sumwt = griddata_merge_weights(gd_list, algorithm='uniform') self.vis = griddata_reweight(self.vis, gd, cf) gd, sumwt = grid_visibility_to_griddata(self.vis, griddata=gd, cf=cf) im = fft_griddata_to_image(gd, gcf) im = normalize_sumwt(im, sumwt) if self.persist: export_image_to_fits(im, '%s/test_gridding_dirty_2d_uniform.fits' % self.dir) self.check_peaks(im, 99.42031190701735)