ximgproc_SuperpixelLSC
import { ximgproc_SuperpixelLSC } from '@banou/opencv-wasm'Use after await initOpenCV(). See the initialization and named imports guide.
Native object: release it with using or delete(). Factories can return null; check before calling methods. Inherits Algorithm.
Class implementing the LSC (Linear Spectral Clustering) superpixels algorithm described in [LiCVPR2015LSC].
LSC (Linear Spectral Clustering) produces compact and uniform superpixels with low computational costs. Basically, a normalized cuts formulation of the superpixel segmentation is adopted based on a similarity metric that measures the color similarity and space proximity between image pixels. LSC is of linear computational complexity and high memory efficiency and is able to preserve global properties of images
Constructors and members
clone
Create another handle to the same native object. This retains the object without copying its pixels or algorithm state; dispose both handles separately.
clone(): this;The this result.
getNumberOfSuperpixels
Calculates the actual amount of superpixels on a given segmentation computed and stored in SuperpixelLSC object.
getNumberOfSuperpixels(): number;The number result.
iterate
Calculates the superpixel segmentation on a given image with the initialized parameters in the SuperpixelLSC object.
This function can be called again without the need of initializing the algorithm with
createSuperpixelLSC(). This save the computational cost of allocating memory for all the
structures of the algorithm.
iterate(num_iterations: number): void;2 available overloads
iterate(): void;iterate(num_iterations: number): void;num_iterationsNumber of iterations. Higher number improves the result.
The function computes the superpixels segmentation of an image with the parameters initialized with the function createSuperpixelLSC(). The algorithms starts from a grid of superpixels and then refines the boundaries by proposing updates of edges boundaries.
getLabels
Returns the segmentation labeling of the image.
Each label represents a superpixel, and each pixel is assigned to one superpixel label.
getLabels(labels_out: Mat): void;labels_outOutput destination, filled by the native operation. Return: A CV_32SC1 integer array containing the labels of the superpixel segmentation. The labels are in the range [0, getNumberOfSuperpixels()].
The function returns an image with the labels of the superpixel segmentation. The labels are in the range [0, getNumberOfSuperpixels()].
getLabelContourMask
Returns the mask of the superpixel segmentation stored in SuperpixelLSC object.
getLabelContourMask(image: Mat, thick_line: boolean): void;2 available overloads
getLabelContourMask(image: Mat): void;getLabelContourMask(image: Mat, thick_line: boolean): void;imageOutput destination, filled by the native operation. Return: CV_8U1 image mask where -1 indicates that the pixel is a superpixel border, and 0 otherwise.
thick_lineIf false, the border is only one pixel wide, otherwise all pixels at the border are masked.
The function return the boundaries of the superpixel segmentation.
enforceLabelConnectivity
Enforce label connectivity.
enforceLabelConnectivity(min_element_size: number): void;2 available overloads
enforceLabelConnectivity(): void;enforceLabelConnectivity(min_element_size: number): void;min_element_sizeThe minimum element size in percents that should be absorbed into a bigger superpixel. Given resulted average superpixel size valid value should be in 0-100 range, 25 means that less then a quarter sized superpixel should be absorbed, this is default.
The function merge component that is too small, assigning the previously found adjacent label to this component. Calling this function may change the final number of superpixels.
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