Source code for mantidimaging.core.operations.divide.divide

# Copyright (C) 2022 ISIS Rutherford Appleton Laboratory UKRI
# SPDX - License - Identifier: GPL-3.0-or-later

from functools import partial
from typing import Union, Callable, Dict, Any

from PyQt5.QtWidgets import QFormLayout, QDoubleSpinBox, QComboBox

from mantidimaging import helper as h
from import Images
from mantidimaging.core.operations.base_filter import BaseFilter
from mantidimaging.gui.mvp_base import BasePresenter
from mantidimaging.gui.utility.qt_helpers import Type

[docs]class DivideFilter(BaseFilter): """Divides a stack of images by a value. That value can be the pixel size, and can be specified in either microns or cms, to obtain attenuation values. Intended to be used on: Reconstructed slices When: To calculate attenuation values by dividing by the pixel size in microns Caution: Check preview values before applying divide """ filter_name = "Divide" link_histograms = True
[docs] @staticmethod def filter_func(images: Images, value: Union[int, float] = 0, unit="micron", progress=None) -> Images: h.check_data_stack(images) if not value: raise ValueError('value parameter must not equal 0 or None') if unit == "micron": value *= 1e-4 /= value return images
[docs] @staticmethod def register_gui(form: 'QFormLayout', on_change: Callable, view: 'BasePresenter') -> Dict[str, Any]: from mantidimaging.gui.utility import add_property_to_form _, value_widget = add_property_to_form("Divide by", Type.FLOAT, default_value=1, valid_values=[1e-7, 10000], form=form, on_change=on_change, tooltip="Value the data will be divided by") assert value_widget is not None, "Requested widget was for FLOAT, got None instead" value_widget.setDecimals(7) _, unit_widget = add_property_to_form("Unit", Type.CHOICE, valid_values=["micron", "cm"], form=form, on_change=on_change, tooltip="The unit of the input number. " "Microns will be converted to cm before division") return {'value_widget': value_widget, 'unit_widget': unit_widget}
[docs] @staticmethod def execute_wrapper( # type: ignore value_widget: QDoubleSpinBox, unit_widget: QComboBox) -> partial: value = value_widget.value() unit = unit_widget.currentText() return partial(DivideFilter.filter_func, value=value, unit=unit)
[docs] @staticmethod def validate_execute_kwargs(kwargs: Dict[str, Any]) -> bool: if 'value_widget' not in kwargs: return False return True