Can I choose point with mouse from video?
1 回表示 (過去 30 日間)
古いコメントを表示
I am thinking of live video from cam as background, I want to choose point by mouse click so I can focus on this point with servo motor to put it in the center . the problem: it seems I can't use "ginput" on video, can I?, I thought maybe I could press key in realtime so I get screenshot "imshow" which I can choose point from! but I couldn't achieve this code.
0 件のコメント
回答 (3 件)
Chris Barnhart
2015 年 2 月 1 日
編集済み: Chris
2015 年 2 月 1 日
If the live video is placed into a matlab figure object - then it might be easy. This code tracks the mouse and shows the click points.
function gui_test()
hf = figure(1)
set(hf,'WindowButtonMotionFcn',cb_mm);
set(hf,'WindowButtonDownFcn',@cb_fig);
set(hf,'WindowButtonUpFcn',@cb_fig);
function cb_mm(h,e)
%disp(e.Source)
disp(h.CurrentPoint)
end
function cb_fig(hobj,e)
%disp(e.Source)
disp(hobj.CurrentPoint);
end
end
0 件のコメント
Ahmad
2015 年 2 月 2 日
1 件のコメント
Chris Barnhart
2015 年 2 月 2 日
I just checked 2007 as follows:
h=figure(1)
inspect(h)
It also has the Window... Fcn for callback.
However, the dot notation is possibly only 2014b, use get(hobj,'CurrentPoint') instead. This runs in 2007.
function gui_test()
function cb_mm(hobj,e)
%disp(e.Source)
disp(get(hobj,'CurrentPoint'));
end
function cb_fig(hobj,e)
%disp(e.Source)
disp(sprintf('click at %d %d', get(hobj,'CurrentPoint')));
end
hf = figure(1)
findfigs
set(hf,'WindowButtonMotionFcn',@cb_mm);
set(hf,'WindowButtonDownFcn',@cb_fig);
set(hf,'WindowButtonUpFcn',@cb_fig);
end
参考
カテゴリ
Help Center および File Exchange で Interactive Control and Callbacks についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!