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Index › Programming Questions & Help › Programs › not ovewriting images + wait for 30 secs
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not ovewriting images + wait for 30 secs (Read 2001 times)
arie willem
not ovewriting images + wait for 30 secs
May 19th, 2010, 4:07am  
Hello All,

I'm busy with an exebition were I would like to have a camera detecting faces and when a face is detected it makes a picture. After making a picture I want it to wait for 30 secs before he starts detecting faces again. What it does right now is: On every 2 sec it looks if a face is recognized, and if it's making a picture. If not he checks the next time when he reached the 2 sec. So my question is how to add a timer that basically stops the program for 30 secs.

And does anybody knows how to add pictures in stead of overwriting them (what it does right now)

Code:

int startingTime;
float multi;

import hypermedia.video.*;
import lmu.*;

int has_taken_picture_in_second;
OpenCV opencv;
int photoNo;

void setup()
{
  size(320, 240);
  background(#99EEAA);
  startingTime = millis();
  
  frameRate(25);  
  opencv = new OpenCV(this);
  opencv.capture( width, height );
  opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );    // load the FRONTALFACE description file
}

void draw()
{
  opencv.read();
  image( opencv.image(), 0, 0 );
  // detect anything ressembling a FRONTALFACE
  Rectangle[] faces = opencv.detect();
  
  int seconds = (millis() - startingTime) / 1000;
  int minutes = seconds / 60;
  int hours = minutes / 60;
  seconds -= minutes * 60;

  println(seconds);
  //println(minutes);

  // maakt elke ... seconde een foto
  if (seconds > 2)
  {
     startingTime=millis();
     has_taken_picture_in_second = -1;
   }

  // maakt een foto wanneer een gezicht is herkent
  if (seconds % 30 == 2 && has_taken_picture_in_second != seconds)
  {
    for( int i=0; i<faces.length; i++ )
    {
	 has_taken_picture_in_second = seconds;
	 saveFrame(photoNo+".png");
	 photoNo++;
	 println("gezicht herkent!");
    
    }
     
  }
}//end draw


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PhiLho 
Re: not ovewriting images + wait for 30 secs
Reply #1 - May 19th, 2010, 5:24am  
arie willem wrote on May 19th, 2010, 4:07am:
So my question is how to add a timer that basically stops the program for 30 secs.

Easy: set a boolean, like bStop, and a secondary timer variable, stopStartTime.

Upon some condition, set this bStop to true, and stopStartTime to millis().
At start of draw(), add:
Code:
if (bStop) {
  if (millis() - stopStartTime < 30000) {
    return; // Don't draw anything
  } else {
    bStop = false; // Restart drawing
  }
}
}
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WWW  
arie willem
Re: not ovewriting images + wait for 30 secs
Reply #2 - May 26th, 2010, 4:31am  
PhiLho, thank you for your help so far.

What the timer does right now is it's starting immediately. But it had to begin after a photo has taken. And also it keeps on counting right now.

Here's te code. I hope you can help me further.

I you have the solution please can you paste the whole code Smiley  Grin

Code:
int startingTime;
float multi;
boolean bStop=true; //before setup()
int stopStartTime;
import hypermedia.video.*;
import lmu.*;

int has_taken_picture_in_second;
OpenCV opencv;
int photoNo;

void setup()
{
  size(320, 240);
  background(#99EEAA);
  startingTime = millis();
  
  frameRate(25);  
  opencv = new OpenCV(this);
  opencv.capture( width, height );
  opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );    // load the FRONTALFACE description file
}

void draw()



{
  
  opencv.read();
  image( opencv.image(), 0, 0 );
  // detect anything ressembling a FRONTALFACE
  Rectangle[] faces = opencv.detect();
  
  int seconds = (millis() - startingTime) / 1000;
  int minutes = seconds / 60;
  int hours = minutes / 60;
  seconds -= minutes * 60;

  println(seconds);
  //println(minutes);

} 

  // maakt elke ... seconde een foto
  if (seconds > 2)
  {
     startingTime=millis();
     has_taken_picture_in_second = -1;
   }

  // maakt een foto wanneer een gezicht is herkent
  if (seconds % 30 == 2 && has_taken_picture_in_second != seconds)
  {
    for( int i=0; i<faces.length; i++ )
    {
	 has_taken_picture_in_second = seconds;
	 //saveFrame(photoNo+".png");
	 photoNo++;
	 println("gezicht herkent!");
    
    if (bStop) {
  if (millis() - stopStartTime < 30000) {
    return; // Don't draw anything
  } else {
    bStop = true; // Restart drawing
  }
}
    }
     
  }
}//end draw
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amnonP5
Re: not ovewriting images + wait for 30 secs
Reply #3 - May 30th, 2010, 12:54pm  
All right, now for the other half of this project Wink

Code:
import hypermedia.video.*;
import java.awt.Rectangle;

OpenCV opencv;
boolean pictureJustTaken = false;
int startTimer;
int interval = 20; // interval in seconds

void setup() {
  size(320,240);
  opencv = new OpenCV(this);
  opencv.capture(width,height);
  opencv.cascade(OpenCV.CASCADE_FRONTALFACE_ALT);
}

void draw() {
  opencv.read();
  image(opencv.image(),0,0);

  Rectangle[] faces = opencv.detect(1.2,2,OpenCV.HAAR_DO_CANNY_PRUNING,40,40);

  if (pictureJustTaken == false && faces.length >= 1) {
    saveFrame("/faces/" + year() + "-" + month() + "-"  + day() + " "  + hour() + "."  + minute() + "."  + second() + ".png");
    pictureJustTaken = true;
    startTimer = millis();
  }

  if (pictureJustTaken) {
    if (millis() - startTimer > (interval * 1000)) {pictureJustTaken = false;}
  }
}

public void stop() {
  opencv.stop();
  super.stop();
}
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arie willem
Re: not ovewriting images + wait for 30 secs
Reply #4 - May 31st, 2010, 1:17am  
wow nice. I'm gonna put it all together for the exhibition!! Thanks for y'r help.
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