problem using tracking in OpenCV
in
Contributed Library Questions
•
2 years ago
Hi!
I'm trying to do some simple motion tracking with processing and the OpenCV library.
my programming skills are bare minimum, but I'm eager to learn and excited at how fast processing is at getting visible results.
anyway, what ive got untill now is this:
- import hypermedia.video.*; // Imports the OpenCV library
- OpenCV opencv; // Creates a new OpenCV Object
- void setup() {
- size( 480, 320 );
- opencv = new OpenCV( this ); // Initialises the OpenCV object
- opencv.capture( 480, 320 ); // Opens a video capture stream
- }
- void draw() {
- opencv.read(); // Grabs a frame from the camera
- opencv.absDiff(); // Calculates the absolute difference
- opencv.convert( OpenCV.GRAY );
- opencv.blur( OpenCV.BLUR, 4 );
- opencv.threshold(10);
- opencv.remember(); // Remembers the current frame
- Blob[] blobs = opencv.blobs(20, 200, 4, true, 200); //Blob detection
- stroke(255,0,0);
- println(blobs.length);
- if(blobs.length <= 1) {
- float midtpunktx = blobs[0].centroid.x;
- float midtpunkty = blobs[0].centroid.y;
- rect(midtpunktx-5, midtpunkty-5, 10, 10); //drawing rectangle at blobs[0]
- }
- image( opencv.image(), 0, 0 ); // Display the difference image
- opencv.restore();
- }
up until blob detection it gives me a black/white image of the motion in frame.
Then I'm trying to get the x and y coordinates from the largest blob.
which doesn't seem to work.
blob.length returns "0" no matter how I tweak the settings of opencv.blobs()
Ive tried different solutions and asked a programmer friend for help, but nothing yielded results.
If anyone can help me out, It will greatly appriciated.
-hammedhaaret
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