euler_numbereuler_numbereuler_numberEulerNumberEulerNumber (Operator)

Name

euler_numbereuler_numbereuler_numberEulerNumberEulerNumber — Calculate the Euler number.

Signature

Description

The operator euler_numbereuler_numbereuler_numberEulerNumberEulerNumber calculates the Euler number, i.e., the difference between the number of connection components and the number of holes.

If more than one region is passed the results are stored in tuples, the index of a value in the tuple corresponding to the index of a region in the input.

Parallelization

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.

Parameters

Result

The operator euler_numbereuler_numbereuler_numberEulerNumberEulerNumber returns the value 2 (H_MSG_TRUE) if the input is not empty. The behavior in case of empty input (no input regions available) is set via the operator set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). The behavior in case of empty region (the region is the empty set) is set via set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>). If necessary an exception is raised.

Possible Predecessors

thresholdthresholdthresholdThresholdThreshold, regiongrowingregiongrowingregiongrowingRegiongrowingRegiongrowing, connectionconnectionconnectionConnectionConnection

Alternatives

connect_and_holesconnect_and_holesconnect_and_holesConnectAndHolesConnectAndHoles

Module

Foundation