Sensing Color in a Video using Webcam

General Discussion Other

fantasych..

Sensing Color in a Video using Webcam

in General Discussion • Other • 1 year ago

Hello,

I am trying to implement color detection within my code. I am planning to have a pair of red gloves, and a pair of blue gloves that I would like to be detected. The main objective of my code is to create a 'square' when a collision happens with the red/blue gloves.

If someone can give me a simple example that would be great, and this will be a live video feed.

Thanks!

Replies(2)

cedrickie..

Re: Sensing Color in a Video using Webcam

1 year ago

This code let you track a point using the color tracker class.

you first have to define a color my pressing C

works with the webcam.

Its not my code, but i have to admit i dont know where i actually got it from its quite old.

import processing.video.*;
Capture capture;
ColorTracker tracker;
int inputW = 620;
int inputH = 480;
float sf = 1;
boolean shown = true;
void setup() {
size(int(inputW*sf), int(inputH*sf));
frameRate(30);
smooth();
strokeWeight(3);
capture = new Capture(this, inputW, inputH, 30);
tracker = new ColorTracker(int(inputW*sf), int(inputH*sf), color(255, 0, 0, 0));
tracker.scaleFactor = sf;
}
void draw() {
capture.read();
background(0);
if (shown)image(capture, 0, 0, width, height);
tracker.analyze(capture);
if (shown) {
fill(tracker.trackingColor );
stroke(0, 0, 0, 100);
ellipse(tracker.x, tracker.y, 20, 20);
}
}
// set a new tracking color: hold c or v and click somewhere
void mouseReleased() {
if (keyPressed == true) {
if (key == 'c') {
tracker.trackingColor = capture.get(int(mouseX/sf), int(mouseY/sf));
}
}
}
void keyPressed() {
if (key == 'x') {
shown = !shown;
background(255);
}
}
class ColorTracker{
int trackerWidth = 80;
int trackerHeight = 80;
int gutter = 45;
int thresholdH = 10;
int thresholdS = 40;
int thresholdB = 60;
color trackingColor = color(0,0,0);
int x,y = -1;
int firstX, firstY = -1;
int lastX, lastY = -1;
float scaleFactor = 1;
ColorTracker(int w, int h, color col) {
trackerWidth = w;
trackerHeight = h;
trackingColor = col;
}
void analyze(PImage img){
firstX = firstY = trackerWidth + 1;
lastX = lastY = -1;
int curX, curY;
color curColor;
float diffH;
float diffS;
float diffB;
int count = trackerWidth*trackerHeight;
for (int i = 0; i < count; i+=gutter) {
curY = int(i / trackerWidth);
curX = i % trackerWidth;
curColor = img.get(curX,curY);
colorMode(HSB);
diffH = abs(hue(trackingColor) - hue(curColor));
diffS = abs(saturation(trackingColor) - saturation(curColor));
diffB = abs(brightness(trackingColor) - brightness(curColor));
if (diffH < thresholdH && diffS < thresholdS && diffB <thresholdB) {
stroke(100,255,200,100);
//point(curX,curY);
if (curX < firstX) firstX = curX;
if (curY < firstY) firstY = curY;
if (curX > lastX) lastX = curX;
if (curY > lastY) lastY = curY;
}
}
x = firstX + abs(firstX - lastX) / 2;
y = firstY + abs(firstY - lastY) / 2;
}
}

fantasych..

Re: Sensing Color in a Video using Webcam

1 year ago

Thank you so much cedrickiefer!! I'll try it out =]

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