Module: morphometric_feature_extraction

Overview

This modules provides the implementation of the DoMorphometricFeaturesExtraction class used to handle the process for the morphometric features extraction. The tasks in the process are orchestrated by the do_morphometric_features_extraction_process_func()

Classes relations

Classes and Inheritance Structure

Summary

do_morphometric_features_extraction_process_func(...)	Function for the morphometric feature extraction Process.
FeaturesArray
DoMorphometricFeaturesExtraction([name, ...])	Derived class orchestrating the tasks

Module API

class DoMorphometricFeaturesExtraction(name='do_gal_shape_extraction', func=<function do_morphometric_features_extraction_process_func>, plot_func=<function analysis_plot>, parser=None, add_plot_task=True)

Bases: asterism.pipeline_manager.analysis_processes.AnalysisProcess

Derived class orchestrating the tasks

• extract_geometric_features DoExtractGeometricFeatures
• extract_Hu_moments_features DoExtractHuMomentsFeatures
• extract_morphological_features DoExtractMorphologyFeatures
• extract_galaxy_profile_fit_features DoExtractGalaxyProfileFitFeatures
• extract_arr_radial_distr_features DoExtractAttractorsRadialDistrFeatures

Parameters:

name : str

the name for the Process

func : :function:

The function that handles tha tasks

image_id : int

id of the image

plot_func : :function:

plotting function for this process

parser :

add_plot_task : bool

Methods

add_analysis_task(task_class, name)
dump_to_conf_file(file)
list_parameters()
run(image[, image_id, extra_message])	Method that calls the .func to combine AnalysisTask and produce the output
run_plotting(plot_func, \*args, \*\*kwargs)
set_par(task_name, par_name, \*\*kwargs)
set_pars_from_parser(conf_file_lines, args, ...)
set_plotting()
start_message([extra_message])
stop_message()

do_morphometric_features_extraction_process_func(process, image, image_id=None, cl_id=None, x_c=None, y_c=None, morphometry_input_data_original=None, morphometry_input_data_gabor=None, morphometry_input_data_deproj=None, morphometry_input_data_unsharp=None, no_plot=False, bkg_image=None, bkg_lvl=None)

Function for the morphometric feature extraction Process. The following AnalysisTask derived tasks are used

• extract_geometric_features DoExtractGeometricFeatures
• extract_Hu_moments_features DoExtractHuMomentsFeatures
• extract_morphological_features DoExtractMorphologyFeatures
• extract_galaxy_profile_fit_features DoExtractGalaxyProfileFitFeatures
• extract_arr_radial_distr_features DoExtractAttractorsRadialDistrFeatures

Features are from each task are returned as list of asterism.core.morphometry.features.MorphometricFeatures objects Each task function is calling feature extraction function from asterism.core.morphometry. These functions have an internal try/execpt structure organinze in a such way that if a feture extraction fails, np.nan array is returned, with the corresponding columns names

Parameters:

process : AnalysisProcess

instance of the analysis process

image : Image instance

The input image

image_id : int

id of the image

no_plo :t bool, optional (defaule=False):

morphometry_input_data_original :class:`asterism.analysis_processes.morphometric_features_input_products.MorphometryInputData`

class instance storing the input data for the morphometric feature extraction

morphometry_input_data_deproj :class:`asterism.analysis_processes.morphometric_features_input_products.MorphometryInputData`

class instance storing the input data for the morphometric feature extraction

bkg_image : 2D np.array, optional

numpy array of the image of the bkg image

bkg_lvl : float,optional

value of the background image, estimated for the current image

Returns:

products : AnalysisProcessProducts

instance of the AnalysisProcessProducts storing into the member prod_list FeaturesArray instance with all the features and features names extracted