# Copyright 2014 Diamond Light Source Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
.. module:: spectrum_crop
:platform: Unix
:synopsis: A plugin to crop a spectra
.. moduleauthor:: Aaron D. Parsons <scientificsoftware@diamond.ac.uk>
"""
import logging
import numpy as np
from savu.plugins.filters.base_filter import BaseFilter
from savu.plugins.driver.cpu_plugin import CpuPlugin
from savu.plugins.utils import register_plugin
[docs]@register_plugin
class SpectrumCrop(BaseFilter, CpuPlugin):
def __init__(self):
logging.debug("cropping spectrum")
super(SpectrumCrop, self).__init__("SpectrumCrop")
[docs] def process_frames(self, data):
data = data[0]
data_cropped = data[self.new_idx]
return data_cropped
[docs] def setup(self):
in_dataset, out_datasets = self.get_datasets()
cropped = out_datasets[0]
cropped.create_dataset(in_dataset[0])
in_meta = in_dataset[0].meta_data
out_meta = cropped.meta_data
crop_range = self.parameters['crop_range']
# axis_labels = in_dataset[0].get_axis_label_keys()
raw_axis = in_meta.get(self.parameters['axis'])
logging.debug("the raw axis is: %s" % str(raw_axis))
self.new_idx = (raw_axis>crop_range[0]) & (raw_axis<crop_range[1])
new_axis = raw_axis[self.new_idx]
out_meta.set(self.parameters['axis'], new_axis)
new_len = len(new_axis)
# print "newlen is"+str(new_len)
shape = in_dataset[0].get_shape()[0:-1]+(new_len,)
# print shape
cropped.set_shape(shape)
in_pData, out_pData = self.get_plugin_datasets()
in_pData[0].plugin_data_setup('SPECTRUM', self.get_max_frames())
out_pData[0].plugin_data_setup('SPECTRUM', self.get_max_frames())
[docs] def get_max_frames(self):
return 'single'
[docs] def nOutput_datasets(self):
return 1