poses

Absolute poses associated with views in view set

Syntax

sensorPoses = poses(vSet)

Description

sensorPoses = poses(vSet) returns a table of absolute poses associated with the views contained in the view set, vSet.

Examples

Retrieve Absolute Poses From Image View Set

Load images into the workspace.

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

Compute features for the first image.

I = im2gray(readimage(images,1));
pointsPrev = detectSURFFeatures(I);
[featuresPrev,pointsPrev] = extractFeatures(I,pointsPrev);

Create an image view set and add the extracted feature points to the image view set.

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

Compute features and matches for the rest of the images.

for i = 2:numel(images.Files)
 I = im2gray(readimage(images,i));
 points = detectSURFFeatures(I);
 [features,points] = extractFeatures(I,points);
 vSet = addView(vSet,i,'Features',features,'Points',points);
 pairsIdx = matchFeatures(featuresPrev,features);
 vSet = addConnection(vSet,i-1,i,'Matches',pairsIdx);
 featuresPrev = features;
end

Get the absolute poses.

sensorPoses = poses(vSet)

sensorPoses=5×2 table
    ViewId    AbsolutePose
    ______    ____________

      1       1x1 rigid3d 
      2       1x1 rigid3d 
      3       1x1 rigid3d 
      4       1x1 rigid3d 
      5       1x1 rigid3d 

Input Arguments

vSet — Image view set

imageviewset object

Image view set, specified as an imageviewset object.

Output Arguments

sensorPoses — Absolute poses

two-column table

Absolute poses, returned as a two-column table. The table contains columns as described in this table.

Column	Description
ViewID	View identifier, returned as a positive integer. View identifiers are unique to a specific view.
AbsolutePose	Absolute pose of the view, specified as a rigid3d object.