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ofxColorBlobTracker.cpp
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ofxColorBlobTracker.cpp
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//
// ofxColorBlobTracker.cpp
// opencvExample
//
// Created by Shunichi Kasahara on 12/16/13.
//
//
#include "ofxColorBlobTracker.h"
void ofxColorBlobTracker::init(int width, int height)
{
one.pos = ofVec2f(0,0);
camWidth = width;
camHeight = height;
colorImg.allocate(camWidth, camHeight);
colorImgHSV.allocate(camWidth, camHeight);
hueImg.allocate(camWidth, camHeight);
satImg.allocate(camWidth, camHeight);
briImg.allocate(camWidth, camHeight);
reds.allocate(camWidth, camHeight);
colorTrackedPixelsRed =new unsigned char [camWidth*camHeight];
trackedTextureRed.allocate(camWidth, camHeight, GL_LUMINANCE);
isShowDebug = false;
}
void ofxColorBlobTracker::update(ofPixelsRef pixelRef)
{
colorImg.setFromPixels(pixelRef);
colorImgHSV = colorImg;
colorImgHSV.convertRgbToHsv();
colorImgHSV.convertToGrayscalePlanarImages(hueImg, satImg, briImg);
hueImg.flagImageChanged();
satImg.flagImageChanged();
briImg.flagImageChanged();
unsigned char * huePixels = hueImg.getPixels();
unsigned char * satPixels = satImg.getPixels();
unsigned char * briPixels = briImg.getPixels();
int nPixels = camWidth*camHeight;
if(one.bri < 230)
{
for (int i = 0; i < nPixels; i++){ //let's go through every pixel in hue pixels
if ((huePixels[i] >= one.hue - 12 && huePixels[i] <= one.hue + 12) && //if the hue is of a certain range
(satPixels[i] >= one.sat - 24 && satPixels[i] <= one.sat + 40) &&
(briPixels[i] >= one.bri - 30 && briPixels[i] <= one.bri + 30)){ //if the saturation is of a certain range
colorTrackedPixelsRed[i] = 255; //mark this corresponding pixel white
} else {
colorTrackedPixelsRed[i] = 0; //if it doesn't fit then color the corresponding pixel black
}
}
}else
{
for (int i = 0; i < nPixels; i++){ //let's go through every pixel in hue pixels
if ((huePixels[i] >= one.hue - 24 && huePixels[i] <= one.hue + 24) && //if the hue is of a certain range
(satPixels[i] >= one.sat - 24 && satPixels[i] <= one.sat + 200) &&
(briPixels[i] >= one.bri - 150 && briPixels[i] <= one.bri + 150)){ //if the saturation is of a certain range
colorTrackedPixelsRed[i] = 255; //mark this corresponding pixel white
} else {
colorTrackedPixelsRed[i] = 0; //if it doesn't fit then color the corresponding pixel black
}
}
}
reds.setFromPixels(colorTrackedPixelsRed, camWidth, camHeight);
reds.blurGaussian();
finderRed.findContours(reds, 10, nPixels/3, 1, false, true);
trackedTextureRed.loadData(colorTrackedPixelsRed,
camWidth, camHeight, GL_LUMINANCE);
if (finderRed.blobs.size()!= 0) {
one.pos = ofVec2f(finderRed.blobs[0].centroid.x,
finderRed.blobs[0].centroid.y);
isTrack = true;
pos = one.pos;
//Dispatch Event
ofNotifyEvent(newFoundBlobEvent, pos);
}else{
isTrack = false;
}
}
void ofxColorBlobTracker::draw()
{
if(!isShowDebug) return;
ofPushStyle();
ofNoFill();
ofSetColor(255);
ofRect(0, 0, ofGetWidth(), ofGetHeight());
ofFill();
ofSetColor(0,0,0,200);
ofRect(0, 0, ofGetWidth(), ofGetHeight());
ofSetColor(255,12,120);
ofDrawBitmapStringHighlight("ofxColorBlobTracker Debug View", 0, ofGetHeight() - 20);
ofDrawBitmapStringHighlight("Input Video Size :" + ofToString(camWidth) + "," + ofToString(camHeight), 0, ofGetHeight());
ofPopStyle();
ofPushStyle();
ofNoFill();
ofSetColor(255);
ofRect(0, 0, camWidth, camHeight);
ofPopStyle();
ofDrawBitmapStringHighlight("Video To Pickup Color MODE, point the color yo want to track", 0, 0);
ofDrawBitmapStringHighlight("Video To Pickup Color", 0, 20);
finderRed.draw();
ofColor col;
col.setHsb(one.hue, one.sat, one.bri);
ofSetColor(col);
ofRect(0, camHeight + 20, 20, -20);
ofSetColor(255);
ofDrawBitmapString("hue : " + ofToString(one.hue) + "Sat : " + ofToString(one.sat) + "Bri : " + ofToString(one.bri) , 20, camHeight + 20);
colorImgHSV.draw(camWidth + 20, 0.0);
glPushMatrix();
glTranslatef(camWidth + 20, camHeight + 40, 0);
reds.draw(0, 0);
glPopMatrix();
glPushMatrix();
glTranslatef(0, camHeight + 40, 0);
trackedTextureRed.draw(0, 0);
finderRed.draw();
glPopMatrix();
//reds
if (finderRed.blobs.size()!=0) {
char tempStr1[255];
sprintf(tempStr1, "x:%f y:%f",
finderRed.blobs[0].centroid.x,
finderRed.blobs[0].centroid.y);
ofDrawBitmapString(tempStr1, 20, 250);
}
}
void ofxColorBlobTracker::mousePressed(int x, int y)
{
unsigned char * huePixels = hueImg.getPixels(); //teh hue
unsigned char * satPixels = satImg.getPixels(); //teh saturation
unsigned char * briPixels = briImg.getPixels(); //teh brightness*/ //unnecessary really, hue and sat should be enough
x = MIN(x,hueImg.width-1); //find the smallest value out of those two so we don't crash if we click outside of the camera image
y = MIN(y,hueImg.height-1);
one.hue = huePixels[x+(y*hueImg.width)]; //set the hue
one.sat = satPixels[x+(y*satImg.width)]; //set the sat
one.bri = briPixels[x+(y*briImg.width)];
}
void ofxColorBlobTracker::setTrackColor(HSBColor col)
{
one = col;
}
HSBColor ofxColorBlobTracker::pickupColor(int x, int y)
{
if(!isShowDebug)
{
HSBColor _col;
return _col;
}
unsigned char * huePixels = hueImg.getPixels(); //teh hue
unsigned char * satPixels = satImg.getPixels(); //teh saturation
unsigned char * briPixels = briImg.getPixels(); //teh brightness*/ //unnecessary really, hue and sat should be enough
x = MIN(x,hueImg.width-1); //find the smallest value out of those two so we don't crash if we click outside of the camera image
y = MIN(y,hueImg.height-1);
HSBColor _one;
_one.hue = huePixels[x+(y*hueImg.width)]; //set the hue
_one.sat = satPixels[x+(y*satImg.width)]; //set the sat
_one.bri = briPixels[x+(y*briImg.width)];
return _one;
}
void ofxColorBlobTracker::setVisible(bool is)
{
isShowDebug = is;
}