Diffusion MITK a3ee5afa1b98

modify region growing 3D to work with low seed point value


modify region growing 3D to work with low seed point value

The 3D region growing tool did not work correctly for a low seed point value. The problem was caused by two parts in the code.
First, in the QmitkAdaptiveRegionGrowingToolGUI.cpp there was always 1 subtracted from the lower threshold, which caused the value in the regionGrower to be set to a high number if the lower threshold is already the lowest intensity in the image.
This is fixed by only subtracting/ adding 1 to the threshold bounds if this still results in values that are within the image pixel values.
Second, the itkAdaptiveThresholdIterator stopped as soon as the seed point value was not greater than the minimal threshold. As the seed point value is equal to the minimal threshold for the lowest value in the image, this condition was adapted.
These change fixes T28437.

Test Plan: manually tested

Reviewers: kislinsk, O1 MITK Reviewer Group I, floca

Reviewed By: O1 MITK Reviewer Group I, floca

Subscribers: floca

Maniphest Tasks: T28437

Differential Revision: https://phabricator.mitk.org/D486


kahlAuthored on Apr 26 2021, 8:54 AM
kahlPushed on Apr 28 2021, 12:05 PM
O1: MITK Reviewer Group I
Differential Revision
Restricted Differential Revision
rMITK068b2c265ba8: avoid underflows
rMITK9ccbc4d1310b: Merge branch 'master' into develop
T28437: 3D region growing may have issues when the seed point is on a pixel with value 0