How to draw circles at the start of a video and display these circles again at specified framecounts?

Question

Sam 2020-6-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/557158-how-to-draw-circles-at-the-start-of-a-video-and-display-these-circles-again-at-specified-framecounts

回答： darova 2020-7-1

Hello,

I am trying to write a program in which the user has to draw 5 ellipses at the beginning of the video. Is there a way I can display these drawn ellipses again at specified framecounts?

framecount = 0;
while vid.hasFrame() %Play video
temp = vid.readFrame();
framecount = framecount + 1;
curr_time(framecount) = vid.CurrentTime;
image(temp,'Parent',curr_axes);
if framecount == 1
    disp('Draw 5 ellipses')
    p1 = drawellipse;
    wait(p1);
    p2 = drawellipse;
    wait(p2);
    p3 = drawellipse;
    wait(p3);
    p4 = drawellipse;
    wait(p4);
    p5 = drawellipse;
    wait(p5);
end
curr_axes.Visible = 'off';
pause(0.05/vid.FrameRate);
%Video of 2 minutes, pause every 4 seconds = 28 * 104 frames
if         framecount == 104 || framecount == 104*2 || framecount == 104*3 || framecount == 104*4 ...
    p6 = imrect; %Draw rectangle to proceed to the next 104 frames of the video
    wait(p6);
end
end