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findTracks

(To be removed) Find matched points across multiple views

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The viewSet object and its findTracks function will be removed in a future release. Use the imageviewset object and its findTracks function instead. For more information, see Version History.

Syntax

tracks = findTracks(vSet)
tracks = findTracks(vSet,viewIds)

Description

tracks = findTracks(vSet) finds point tracks across multiple views.

example

tracks = findTracks(vSet,viewIds) finds point tracks across a subset of views.

Examples

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Open Live Script

Load images.

imageDir = fullfile(toolboxdir('vision'),'visiondata','structureFromMotion');
imds = imageDatastore(imageDir);

Compute features for the first image.

I = rgb2gray(read(imds));
pointsPrev = detectSURFFeatures(I);
[featuresPrev,pointsPrev] = extractFeatures(I,pointsPrev);

Create a viewSet object.

vSet = viewSet;
vSet = addView(vSet,1,'Points',pointsPrev);

Compute features and matches for the rest of the images.

for i = 2:length(imds.Files)
 I = rgb2gray(read(imds));
 points = detectSURFFeatures(I);
 [features, points] = extractFeatures(I,points);
 vSet = addView(vSet,i,'Points',points);
 pairsIdx = matchFeatures(featuresPrev,features);
 vSet = addConnection(vSet,i-1,i,'Matches',pairsIdx);
 featuresPrev = features;
end

Find point tracks.

tracks = findTracks(vSet);

Input Arguments

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viewSet object.

Subset of views in the viewSet object, specified as a vector of integers.

Output Arguments

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Point track objects, returned as an array of pointTrack objects. Each track contains 2-D projections of the same 3-D world point.

Version History

Introduced in R2016a

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R2020a: findTracks function of viewSet object will be removed

The viewSet object and its findTracks function will be removed in a future release. Instead, manage views and pairwise connections between views of data using use the imageviewset object. Finds point track across views of the imageviewset object using its findTracks function.

See Also

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