MATLAB: Using impixel with an image sequence

image analysisimage processingvideo processing

Is there a way to use the impixel() command command to select (x,y) pixel coordinates in an image sequence while it plays on a loop? The pixel region selection tool in the Movie Player brought up through implay(sequence) is close to what I need but I want to be able to point and click rather than individually copy and past pixel coordinates. Being able to view the dynamics in the sequence is important because I want to select features that change over time. Is there a simple way to implement this? Thank you!

Best Answer

Hi,

I'm not expert with implay function and its working, but "point and click" makes me think to the ginput function:

https://it.mathworks.com/help/matlab/ref/ginput.html

Does it fulfil to your issue?

Related Solutions

MATLAB: For function with impixel

You do not initialize B, so when you assign in to it starting at (:,2,2) then (:,1,:) and (:,:,1) are going to have the default value 0.

Perhaps you want

B(:,x-1,y-1) = impixel(A,x,y);

MATLAB: Impixel info – just coordinates

Moved comment to here:

From impixelinfo question, which is a similar question to yours, Ashish Uthama suggests either to use ginput or to grab the coordinate data as

 childHandles = get(hp,'Children');
 get(childHandles(1),'Tag')
    ans =
       pixelinfo text 
 get(childHandles(1),'String')
    ans =
       (153, 152) <112> [0.50 0.00 0.00]

where hp is the handle to your impixelinfo object. From the '(153, 152) .<112> [0.50 0.00 0.00]' string, you can figure out the x,y coordinates as 153,152.

Best Answer

Related Solutions

MATLAB: For function with impixel

MATLAB: Impixel info – just coordinates

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