Hi there
My scenario is like this: A person enter af zone, a webcam detects this and Processing shall when a certain amount of movement has occurred over time play an audio file.
For the part of detecting movement I use the Frame Differencing example by Golan Levi and a simple audioplayer - these two parts are working together, but when I try to implement a timer/delay on the player.play(); event I don't get it...
Code:
/**
* Frame Differencing
* by Golan Levin.
*
* Quantify the amount of movement in the video frame using frame-differencing.
*/
import processing.video.*;
import ddf.minim.*;
AudioPlayer player;
Minim minim;
float mills,interval;
int numPixels;
int[] previousFrame;
Capture video;
void setup() {
size(640, 480); // Change size to 320 x 240 if too slow at 640 x 480
// Uses the default video input, see the reference if this causes an error
video = new Capture(this, width, height, 24);
numPixels = video.width * video.height;
// Create an array to store the previously captured frame
previousFrame = new int[numPixels];
loadPixels();
minim = new Minim(this);
player = minim.loadFile("groove.mp3", 2048);
mills = millis();
interval=5000;
}
void draw() {
if (video.available()) {
// When using video to manipulate the screen, use video.available() and
// video.read() inside the draw() method so that it's safe to draw to the screen
video.read(); // Read the new frame from the camera
video.loadPixels(); // Make its pixels[] array available
int movementSum = 0; // Amount of movement in the frame
for (int i = 0; i < numPixels; i++) { // For each pixel in the video frame...
color currColor = video.pixels[i];
color prevColor = previousFrame[i];
// Extract the red, green, and blue components from current pixel
int currR = (currColor >> 16) & 0xFF; // Like red(), but faster
int currG = (currColor >> 8) & 0xFF;
int currB = currColor & 0xFF;
// Extract red, green, and blue components from previous pixel
int prevR = (prevColor >> 16) & 0xFF;
int prevG = (prevColor >> 8) & 0xFF;
int prevB = prevColor & 0xFF;
// Compute the difference of the red, green, and blue values
int diffR = abs(currR - prevR);
int diffG = abs(currG - prevG);
int diffB = abs(currB - prevB);
// Add these differences to the running tally
movementSum += diffR + diffG + diffB;
// Render the difference image to the screen
pixels[i] = color(diffR, diffG, diffB);
// The following line is much faster, but more confusing to read
//pixels[i] = 0xff000000 | (diffR << 16) | (diffG << 8) | diffB;
// Save the current color into the 'previous' buffer
previousFrame[i] = currColor;
}
// To prevent flicker from frames that are all black (no movement),
// only update the screen if the image has changed.
if (movementSum > 0) {
updatePixels();
println(movementSum); // Print the total amount of movement to the console
}
if (movementSum > 7000000) {
if (millis()-mills > interval){
player.play();
}
}
}
}
public void stop() {
player.close();
minim.stop();
video.stop();
super.stop();
}
...any suggestions?
Cheers,
Adam
Pages: 1
event triggered after time passed... (Read 931 times)