how to draw lines using given points in a video?

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vimal gayan
vimal gayan 2019-5-17
评论： vimal gayan 2019-5-24
First,I give some points to starting posistion of the video,I need to draw lines through that points and get angles using x,y values,
Currently i able add points and get x,y values of those points while video playing.
videoFileReader = vision.VideoFileReader('ex.mp4');
videoPlayer = vision.VideoPlayer('Position',[1,10,1280,720]);
objectFrame = videoFileReader();
objectRegion = [264,122,93,93];
figure;
imshow(objectFrame);
[shoulder_X,shoulder_Y]= ginput(1);
[elbow_x,elbow_y]= ginput(1);
[wrist_x,wrist_y]= ginput(1);
pos = [shoulder_X,shoulder_Y;elbow_x,elbow_y;wrist_x,wrist_y];
color = {'red','green','magenta'};
start_x = shoulder_X;
start_y=shoulder_Y;
disp(shoulder_X +" - "+shoulder_Y);
% imshow(pointImage);
points = detectMinEigenFeatures(rgb2gray(objectFrame));
pointImage1 = insertMarker(objectFrame,pos,'+','Color',color,'size',10);
plot([shoulder_X,shoulder_Y], [elbow_x,elbow_y]);
plot([wrist_x,wrist_y], [elbow_x,elbow_y]);
figure;
imshow(pointImage1);
title('Detected interest points');
tracker = vision.PointTracker('MaxBidirectionalError',1);
initialize(tracker,pos,objectFrame);
while ~isDone(videoFileReader)
frame = videoFileReader();
[points,validity] = tracker(frame);
out = insertMarker(frame,points(validity, :),'+');
videoPlayer(out);
disp(points);
end
Capturesd.PNG
As shown in above image,
Black circle: current status of my code,and these points move when video playing,
Red Circle:I need to improve red circle to this level.and these lines should move when video playing.
I try to draw lines using plot function but its not work.
plot([shoulder_X,shoulder_Y], [elbow_x,elbow_y]);
plot([wrist_x,wrist_y], [elbow_x,elbow_y]);

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采纳的回答

Mark Sherstan
Mark Sherstan 2019-5-17
Use insertShape(). Cool project!
  10 个评论
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vimal gayan
vimal gayan 2019-5-24
编辑：vimal gayan 2019-5-24
got it,It works now as i want.Thanks for the continues help.

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