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# Copyright 2014 Diamond Light Source Ltd. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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""" |
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.. module:: dezinger_sinogram_deprecated |
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:platform: Unix |
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:synopsis: A plugin working in sinogram space to removes zingers. Remove |
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zingers (caused by scattered X-rays hitting the CCD chip directly) |
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.. moduleauthor:: Nghia Vo <[email protected]> |
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""" |
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from savu.plugins.plugin import Plugin |
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from savu.plugins.driver.cpu_plugin import CpuPlugin |
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from savu.plugins.utils import register_plugin |
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import numpy as np |
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class DezingerSinogramDeprecated(Plugin, CpuPlugin): |
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""" |
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""" |
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def __init__(self): |
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super(DezingerSinogramDeprecated, self).__init__("DezingerSinogramDeprecated") |
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def setup(self): |
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in_dataset, out_dataset = self.get_datasets() |
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out_dataset[0].create_dataset(in_dataset[0]) |
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in_pData, out_pData = self.get_plugin_datasets() |
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in_pData[0].plugin_data_setup('SINOGRAM', 'single') |
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out_pData[0].plugin_data_setup('SINOGRAM', 'single') |
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def pre_process(self): |
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in_pData = self.get_plugin_in_datasets() |
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width_dim = in_pData[0].get_data_dimension_by_axis_label('detector_x') |
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height_dim = \ |
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in_pData[0].get_data_dimension_by_axis_label('rotation_angle') |
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sino_shape = list(in_pData[0].get_shape()) |
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self.width1 = sino_shape[width_dim] |
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self.height1 = sino_shape[height_dim] |
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def process_frames(self, data): |
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tolerance = self.parameters['tolerance'] |
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nhigh = 1.0 + tolerance |
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sinogram = np.copy(data[0]) |
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sinogram[sinogram == 0.0] = np.mean(sinogram) |
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sinogram_d = np.roll(sinogram, 1, axis=0) |
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sinogram_u = np.roll(sinogram, -1, axis=0) |
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list_top = sinogram[0] |
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list_top1 = sinogram[1] |
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list_top2 = list_top / list_top1 |
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list_top[list_top2 > nhigh] = list_top1[list_top2 > nhigh] |
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list_bottom = sinogram[-1] |
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list_bottom1 = sinogram[-2] |
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list_bottom2 = list_bottom / list_bottom1 |
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list_bottom[list_bottom2 > nhigh] = list_bottom1[list_bottom2 > nhigh] |
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mat_ratio_d = sinogram / sinogram_d |
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sinogram[mat_ratio_d > nhigh] = sinogram_d[mat_ratio_d > nhigh] |
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mat_ratio_u = sinogram / sinogram_u |
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sinogram[mat_ratio_u > nhigh] = sinogram_u[mat_ratio_u > nhigh] |
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sinogram[0] = list_top |
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sinogram[-1] = list_bottom |
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return sinogram |
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DiamondLightSource /
Savu
