how to assign manual control points and track it in a video?

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RAJKUMAR Palaniappan 2013-6-20

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编辑： Livnat Landau 2017-3-23

I would like to know if there exist any function in matlab to select one or more feature points manually in the first frame and track the points in the consecutive frames and processes it to acquire information regarding the changes.

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RAJKUMAR Palaniappan 2013-6-26

I already found a positive and working solution on my own, i used ginput, an inbuilt function to point any number of feature points manually and then i used KLT algorithm for the purpose of tracking

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Answer 1

RAJKUMAR Palaniappan 2013-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/79664-how-to-assign-manual-control-points-and-track-it-in-a-video#answer_89975

I already found a positive and working solution on my own, i used ginput, an inbuilt function to point any number of feature points manually and then i used KLT algorithm for the purpose of tracking

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Answer 2

Livnat Landau 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/79664-how-to-assign-manual-control-points-and-track-it-in-a-video#answer_259984

编辑：Livnat Landau 2017-3-23

在 MATLAB Online 中打开

Thanks for your Ginput idea. Here is a code to manually track points in video based on it --

 %
%read & display multiple images from a folder
srcFiles = dir('*.tif');  % the folder in which our images exist
dist=[];
TF=0;
x_v=[];
y_v=[];
%display file order
for i = 1 : length(srcFiles)
    strcat('\',srcFiles(i).name)
end
%manually track points 
for i = 1 : length(srcFiles)
    filename = strcat('\',srcFiles(i).name);
    I = imread(filename);  
    imshow(I)   
    for j=1:size(x_v,2)
        hold on;
        plot(x_v(:,j),y_v(:,j),'+-', 'MarkerSize', 10);
    end
    hold on
    [x,y]=ginput    
    x_v(i,:)=x;
    y_v(i,:)=y;
    close all
end