Difference between revisions of "Modules:GrowCutSegmentation-Documentation-3.6"
(→Usage) |
|||
| (5 intermediate revisions by 2 users not shown) | |||
| Line 5: | Line 5: | ||
|[[Image:GrowCutPanel.png|thumb|260px|Input Panel]] | |[[Image:GrowCutPanel.png|thumb|260px|Input Panel]] | ||
|[[Image:inputPosGesture.png|thumb|180px|Scribble Positive Gesture]] [[Image:inputNegGesture.png|thumb|178px|Scribble Negative Gestures]] | |[[Image:inputPosGesture.png|thumb|180px|Scribble Positive Gesture]] [[Image:inputNegGesture.png|thumb|178px|Scribble Negative Gestures]] | ||
| − | |[[Image:segmented1.png|thumb|500px|Resulting Segmentation]] | + | |- |
| + | |colspan="2"|[[Image:segmented1.png|thumb|500px|Resulting Segmentation]] | ||
|} | |} | ||
| Line 21: | Line 22: | ||
===Module Description=== | ===Module Description=== | ||
Grow Cut Segmentation is a competitive region growing algorithm using cellular automata. The algorithm works by using a set of user input scribbles for foreground and background. For N-class segmentation, the algorithm requires a set of scribbles corresponding the N classes and a scribble for a don't care class. The algorithm executes as follows: | Grow Cut Segmentation is a competitive region growing algorithm using cellular automata. The algorithm works by using a set of user input scribbles for foreground and background. For N-class segmentation, the algorithm requires a set of scribbles corresponding the N classes and a scribble for a don't care class. The algorithm executes as follows: | ||
| − | * Using the user input scribbles, the algorithm automatically computes a region of interest that encompass the scribbles. | + | * Using the "user input scribbles", the algorithm automatically computes a region of interest that encompass the scribbles. |
* Next, the algorithm iteratively tries to label all the pixels in the image using the label of pixels in the user scribbled portions of the image. | * Next, the algorithm iteratively tries to label all the pixels in the image using the label of pixels in the user scribbled portions of the image. | ||
| − | * The algorithm converges when all the pixels in the ROI are | + | * The algorithm converges when all the pixels in the ROI are labeled, and no pixel can change it's label any more. |
* Individual pixels are labeled by computing a weighted similarity metric of a pixel with all its neighbors, where the weights correspond to the neighboring pixel's strength. The neighbor that results in the largest weight greater than the given pixel's strength, confers its label to the given pixel. | * Individual pixels are labeled by computing a weighted similarity metric of a pixel with all its neighbors, where the weights correspond to the neighboring pixel's strength. The neighbor that results in the largest weight greater than the given pixel's strength, confers its label to the given pixel. | ||
| Line 29: | Line 30: | ||
{| | {| | ||
|[[Image:additionalEdit.png|thumb|650px|Additional edits added to the existing segmentation]] | |[[Image:additionalEdit.png|thumb|650px|Additional edits added to the existing segmentation]] | ||
| + | |- | ||
|[[Image:finalSegmentation.png|thumb|650px|Final segmentation]] | |[[Image:finalSegmentation.png|thumb|650px|Final segmentation]] | ||
|} | |} | ||
| Line 34: | Line 36: | ||
== Usage == | == Usage == | ||
| − | * Scribble a set of foreground and background gestures. | + | * '''Select the GrowCutSegment effect''' |
| + | * Scribble a set of foreground and background gestures using different label values. | ||
* Specify the input volume | * Specify the input volume | ||
* Specify the output volume | * Specify the output volume | ||
| − | A gesture volume is automatically created corresponding to the output volume and is visible in the Foreground Layer. To use a different | + | A gesture volume is automatically created corresponding to the output volume and is visible in the Foreground Layer. To use a different set of gestures, change the output volume. |
===Examples, Use Cases & Tutorials=== | ===Examples, Use Cases & Tutorials=== | ||
Latest revision as of 16:25, 25 October 2010
Home < Modules:GrowCutSegmentation-Documentation-3.6Module Name
Grow Cut Segmentation
General Information
Module Type & Category
Type: Editor Effect
Category: Segmentation
Authors, Collaborators & Contact
- Author: Harini Veeraraghavan, Jim Miller
- Contact: veerarag at ge.com
Module Description
Grow Cut Segmentation is a competitive region growing algorithm using cellular automata. The algorithm works by using a set of user input scribbles for foreground and background. For N-class segmentation, the algorithm requires a set of scribbles corresponding the N classes and a scribble for a don't care class. The algorithm executes as follows:
- Using the "user input scribbles", the algorithm automatically computes a region of interest that encompass the scribbles.
- Next, the algorithm iteratively tries to label all the pixels in the image using the label of pixels in the user scribbled portions of the image.
- The algorithm converges when all the pixels in the ROI are labeled, and no pixel can change it's label any more.
- Individual pixels are labeled by computing a weighted similarity metric of a pixel with all its neighbors, where the weights correspond to the neighboring pixel's strength. The neighbor that results in the largest weight greater than the given pixel's strength, confers its label to the given pixel.
After the segmentation, the user can edit the segmentation by providing additional gestures in the image as illustrated in the figure below.
The segmentation resulting from the user's edit is also shown.
Usage
- Select the GrowCutSegment effect
- Scribble a set of foreground and background gestures using different label values.
- Specify the input volume
- Specify the output volume
A gesture volume is automatically created corresponding to the output volume and is visible in the Foreground Layer. To use a different set of gestures, change the output volume.
Examples, Use Cases & Tutorials
- Useful for segmenting out regions of interest in a volume (image)
Quick Tour of Features and Use
Development
Dependencies
Known bugs
Follow this link to the Slicer3 bug tracker.
Usability issues
Follow this link to the Slicer3 bug tracker. Please select the usability issue category when browsing or contributing.
Source code & documentation
Documentation:
More Information
Acknowledgment
This work is part of the National Alliance for Medical Image Computing (NAMIC), funded by the National Institutes of Health through the NIH Roadmap for Medical Research, Grant U54 EB005149. Information on the National Centers for Biomedical Computing can be obtained from National Centers for Biomedical Computing.
References
V. Vezhnevets and V. Konouchine, "GrowCut - Interactive multi-label N-D image segmentation", in Proc. Graphicon, 2005. pp. 150--156.
