capture frame on click
显示 更早的评论
how can i capture a frame on mouse click from a video ?
1 个评论
darova
2019-9-30
I think buttonDownFcn should be used in this case. BUt can't figure out how =(
回答（1 个）
Abhilash Padma
2019-10-3
One of the ways to achieve this task is to play video on axes and use buttonDownFcn of image object. You can try this by typing the following command in your MATLAB prompt which will open an example explaining how to display a video in a custom user interface.
openExample('vision/VideoInCustomGUIExample');
Add the following line in the “displayImage” function of showFrameOnAxis.m
hIm.ButtonDownFcn=@(~,~)imwrite(frame,'a.jpg');
Refer the following link for more information: https://in.mathworks.com/help/vision/examples/video-display-in-a-custom-user-interface.html
2 个评论
darova
2019-10-3
I made simple example for gif animation, but can't set up function for buttonDownFcn
Can you please look?
clc,clear
x = linspace(0,4);
y = sin(x);
plot(x,y);
f = getframe;
filename = 'gif_animation.gif';
[im,map] = rgb2ind(f.cdata,256);
imwrite(im,map,filename,'DelayTime',0,'Loopcount',inf);
fcn = @(~,~,im,map)imwrite(im,map,filename,'DelayTime',0.1,'WriteMode','Append');
hold on
for i = 1:length(x)
h = plot(x(i),y(i),'or');
f = getframe(gca);
[im,map] = rgb2ind(f.cdata,256);
set(gca,'buttonDOwnFcn',@(~,~,im,map)fcn(im,map))
pause(0.1)
delete(h)
end
hold off
SOE CADLAB
2019-10-20
类别
在 帮助中心 和 File Exchange 中查找有关 Images 的更多信息
2019-9-30
2019-10-20
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
