how to draw lines using given points in a video?

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vimal gayan
vimal gayan el 17 de Mayo de 2019
Comentada: vimal gayan el 24 de Mayo de 2019
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]);
  2 comentarios
darova
darova el 17 de Mayo de 2019
try
plot([shoulder_X elbow_x wrist_x shoulder_X], ...
[shoulder_Y elbow_y wrist_y shoulder_Y])
vimal gayan
vimal gayan el 17 de Mayo de 2019
not working :(

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Respuesta aceptada

Mark Sherstan
Mark Sherstan el 17 de Mayo de 2019
Use insertShape(). Cool project!
  10 comentarios
vimal gayan
vimal gayan el 24 de Mayo de 2019
Editada: vimal gayan el 24 de Mayo de 2019
got it,It works now as i want.Thanks for the continues help.

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