Class implementing the F-DBSCAN (Accelerated superpixel image segmentation with a parallelized DBSCAN algorithm) superpixels algorithm by Loke SC, et al. [loke2021accelerated] for original paper. More...
Public Member Functions | |
| int | getNumberOfSuperpixels () |
| Returns the actual superpixel segmentation from the last image processed using iterate. More... | |
| void | iterate (Mat img) |
| Calculates the superpixel segmentation on a given image with the initialized parameters in the ScanSegment object. More... | |
| void | getLabels (Mat labels_out) |
| Returns the segmentation labeling of the image. More... | |
| void | getLabelContourMask (Mat image, bool thick_line) |
| Returns the mask of the superpixel segmentation stored in the ScanSegment object. More... | |
| void | getLabelContourMask (Mat image) |
| Returns the mask of the superpixel segmentation stored in the ScanSegment object. More... | |
 Public Member Functions inherited from OpenCVForUnity.CoreModule.Algorithm | |
| IntPtr | getNativeObjAddr () |
| virtual void | clear () |
| Clears the algorithm state. More... | |
| virtual bool | empty () |
| Returns true if the Algorithm is empty (e.g. in the very beginning or after unsuccessful read. More... | |
| void | save (string filename) |
| virtual string | getDefaultName () |
| Public Member Functions inherited from OpenCVForUnity.DisposableObject | |
| void | Dispose () |
| void | ThrowIfDisposed () |
Static Public Member Functions | |
| static new ScanSegment | __fromPtr__ (IntPtr addr) |
| Static Public Member Functions inherited from OpenCVForUnity.CoreModule.Algorithm | |
| static Algorithm | __fromPtr__ (IntPtr addr) |
| Static Public Member Functions inherited from OpenCVForUnity.DisposableObject | |
| static IntPtr | ThrowIfNullIntPtr (IntPtr ptr) |
Protected Member Functions | |
| override void | Dispose (bool disposing) |
| Protected Member Functions inherited from OpenCVForUnity.DisposableOpenCVObject | |
| DisposableOpenCVObject () | |
| DisposableOpenCVObject (IntPtr ptr) | |
| DisposableOpenCVObject (bool isEnabledDispose) | |
| DisposableOpenCVObject (IntPtr ptr, bool isEnabledDispose) | |
| Protected Member Functions inherited from OpenCVForUnity.DisposableObject | |
| DisposableObject () | |
| DisposableObject (bool isEnabledDispose) | |
Additional Inherited Members | |
| Properties inherited from OpenCVForUnity.DisposableObject | |
| bool | IsDisposed [get, protected set] |
| bool | IsEnabledDispose [get, set] |
Detailed Description
Class implementing the F-DBSCAN (Accelerated superpixel image segmentation with a parallelized DBSCAN algorithm) superpixels algorithm by Loke SC, et al. [loke2021accelerated] for original paper.
The algorithm uses a parallelised DBSCAN cluster search that is resistant to noise, competitive in segmentation quality, and faster than existing superpixel segmentation methods. When tested on the Berkeley Segmentation Dataset, the average processing speed is 175 frames/s with a Boundary Recall of 0.797 and an Achievable Segmentation Accuracy of 0.944. The computational complexity is quadratic O(n2) and more suited to smaller images, but can still process a 2MP colour image faster than the SEEDS algorithm in OpenCV. The output is deterministic when the number of processing threads is fixed, and requires the source image to be in Lab colour format.
Member Function Documentation
◆ __fromPtr__()
|
static |
◆ Dispose()
|
protectedvirtual |
Reimplemented from OpenCVForUnity.CoreModule.Algorithm.
◆ getLabelContourMask() [1/2]
| void OpenCVForUnity.XimgprocModule.ScanSegment.getLabelContourMask | ( | Mat | image, |
| bool | thick_line | ||
| ) |
Returns the mask of the superpixel segmentation stored in the ScanSegment object.
The function return the boundaries of the superpixel segmentation.
- Parameters
-
image Return: CV_8UC1 image mask where -1 indicates that the pixel is a superpixel border, and 0 otherwise. thick_line If false, the border is only one pixel wide, otherwise all pixels at the border are masked.
◆ getLabelContourMask() [2/2]
| void OpenCVForUnity.XimgprocModule.ScanSegment.getLabelContourMask | ( | Mat | image | ) |
Returns the mask of the superpixel segmentation stored in the ScanSegment object.
The function return the boundaries of the superpixel segmentation.
- Parameters
-
image Return: CV_8UC1 image mask where -1 indicates that the pixel is a superpixel border, and 0 otherwise. thick_line If false, the border is only one pixel wide, otherwise all pixels at the border are masked.
◆ getLabels()
| void OpenCVForUnity.XimgprocModule.ScanSegment.getLabels | ( | Mat | labels_out | ) |
Returns the segmentation labeling of the image.
Each label represents a superpixel, and each pixel is assigned to one superpixel label.
- Parameters
-
labels_out Return: A CV_32UC1 integer array containing the labels of the superpixel segmentation. The labels are in the range [0, getNumberOfSuperpixels()].
◆ getNumberOfSuperpixels()
| int OpenCVForUnity.XimgprocModule.ScanSegment.getNumberOfSuperpixels | ( | ) |
Returns the actual superpixel segmentation from the last image processed using iterate.
Returns zero if no image has been processed.
◆ iterate()
| void OpenCVForUnity.XimgprocModule.ScanSegment.iterate | ( | Mat | img | ) |
Calculates the superpixel segmentation on a given image with the initialized parameters in the ScanSegment object.
This function can be called again for other images without the need of initializing the algorithm with createScanSegment(). This save the computational cost of allocating memory for all the structures of the algorithm.
- Parameters
-
img Input image. Supported format: CV_8UC3. Image size must match with the initialized image size with the function createScanSegment(). It MUST be in Lab color space.
The documentation for this class was generated from the following file:
- OpenCVForUnity/Assets/OpenCVForUnity/org/opencv_contrib/ximgproc/ScanSegment.cs
