Change getpts to circle cursor.

I am looking to change the cursor to a circle when using the getpts function. I am manualy digitizing a video frame by frame of a ball traveling across the frame.

Answer 1

[Kiran Felix Robert]

Hi Tom,

You can use the drawpoint function from the Image Processing Toolbox, ROI-Based Processing to have a circular marker on the image. The following code snippet gives you an example for a still image, you can loop it for every frame

I = imread('cameraman.tif'); 
imshow(I); 
ptsx = []; % Final vector for x position 
ptsy = []; % Final Vector for y position 
for i = 1:4 % To save 4 points 
    roi = drawpoint('Color','r','SelectedColor','none'); 
    ptx = roi.Position(1); 
    pty = roi.Position(2); 
    ptsx = [ptsx ptx]; 
    ptsy = [ptsy pty]; 
end 

Kiran Felix Robert