# OPENCV

Name | absDiff()
Examples |
    import hypermedia.video.*;

    OpenCV opencv;

    void setup() {

        size( 320, 240 );

        // open video stream
        opencv = new OpenCV( this );
        opencv.capture( 160, 120 );
    }

    void draw() {

        opencv.read();                               // grab frame from camera
        image( opencv.image(), 0, 0);                // show the original image

        opencv.absDiff();                            // make the difference between the current image and the image in memory

        image( opencv.image(OpenCV.MEMORY), 160, 0 );  // display the image in memory on the right
        image( opencv.image(), 160, 120 );             // display the result on the bottom right
    }

    void keyPressed() {

        opencv.remember();  // store the actual image in memory
    }
Description | Calculate the absolute difference between the image in memory and the current image.
Syntax | `absDiff();`
Return | None
Usage | Application
Related | remember()