How to set modified frames on real time video?

I am studying a real time video with my webcam. The idea is to write a text on a piece of paper while it is moving.

The writing code is done, what I need is to visualise my resulting images (there is a while isrunning(video)) It is an augmented reality problem.

How can I set these edited frames over my video?

vid = videoinput('winvideo', 2, 'YUY2_640x480')

% [...]
hImage = image(zeros(imHeight, imWidth, nBands), 'parent', handles.axes1); % all these variables are already setled previously

% begin the webcam preview

preview(vid, hImage);

video = handles.axes1 ; % This is the axes where my video is running

while isrunning(vid);

video_im = getimage(video) ;

% Transform Matrix text-OriginalIamage

video_display(video, video_im, I) ; % Here I do my frame editing. video: handles. video_im: frame. I: variable for my frame editing, not important for this issue

end

In video_display:

Im = cat(3, Im1, Im2, Im3) ; %this is my solution image, the one I need to visualise instead of the original video frame

set(Im, h);%,'Cdatamapping','direct'); % h is my video handle

drawnow

Thank you very much in advance.

Answer 1

[Walter Roberson]

Probably

set(h, 'CData', Im);