track a moving boundary in footage and image set in matlab

main.m

% Load image or video sequence
vidReader = VideoReader('myVideo.avi');

% Create optical flow object
opticFlow = opticalFlowLK;

% Initialize variables for tracking
prevFrame = rgb2gray(readFrame(vidReader));
oldPoints = detectMinEigenFeatures(prevFrame, 'MinQuality', 0.001);
oldPoints = oldPoints.Location;
bboxPoints = bbox2points(boundingBox);
xCenter = mean(oldPoints(:,1));
yCenter = mean(oldPoints(:,2));
prevFeatures = extractFeatures(prevFrame, oldPoints);

% Loop through frames
while hasFrame(vidReader)
    currentFrame = rgb2gray(readFrame(vidReader));
    [currFeatures, currPoints, validIdx] = ...
        estimateFeatureFlow(opticFlow, prevFrame, currentFrame, prevFeatures, oldPoints);
    newPoints = oldPoints(validIdx, :);
    oldFeatures = prevFeatures(validIdx, :);
    xCenter = mean(newPoints(:,1));
    yCenter = mean(newPoints(:,2));
    bboxPoints = bbox2points(boundingBox);
    prevFeatures = currFeatures;
    oldPoints = newPoints;
    prevFrame = currentFrame;

    % Display tracked object
    videoFrame = insertShape(currentFrame, 'Polygon', bboxPoints, 'LineWidth', 2);
    videoFrame = insertMarker(videoFrame, [xCenter yCenter], 'Color', 'green', 'Size', 10);
    imshow(videoFrame);
    drawnow;
end
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