facedetection

arnolds112

Hello, would it be possible, to use openCV library to blur the faces or interact with the are of image where the face is in other ways? By default you using face detection i get rectangles around the faces, but could i acces only the pixels inside theese rectangles somehow?

koogs

i get rectangles around the faces

how do you get rectangles? an x and y and a width and height?

https://processing.org/reference/get_.html

arnolds112

Yes,

  for (int i = 0; i < faces.length; i++) {
    noFill();
    strokeWeight(5);
    stroke(255,0,0);
    //rect(faces[i].x*scl,faces[i].y*scl,faces[i].width*scl,faces[i].height*scl);
    rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height);
  }

koogs

And did you check the link?

arnolds112

yes, but i want to distort the image of the area in different ways. not only fill it for example blur it i can't seem to be able to do that with this function

koogs

Please don't post duplicates (especially don't call them 'a problem'). Ask any follow up questions here.

koogs

As for the original problem, you've said you can get the position and size of any faces, so you can now manipulate the image any way you like using that information.

arnolds112

i can't get it to work.

The script starts, but as soon as it does the manipulation, face detection stops working.

how can i fix this?

import gab.opencv.*;
import processing.video.*;
import java.awt.*;

Capture video;
OpenCV opencv;

PImage src;

float roiWidth;
float roiHeight;

boolean useROI = true;

void setup() {
  video = new Capture(this, 640/2, 480/2);
  src = video;
  opencv = new OpenCV(this, src);
  size(640, 480);

  opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE);  

  video.start();
}

void draw() {
  scale(2);
  opencv.loadImage(src);

  Rectangle[] faces = opencv.detect();
  println(faces.length);

  for (int i = 0; i < faces.length; i++) {
    opencv.setROI(faces[i].x, faces[i].y, faces[i].width, faces[i].height);
  }

  opencv.findCannyEdges(20,75);
  image(opencv.getOutput(), 0, 0);
}

void captureEvent(Capture c) {
  c.read();
}

arnolds112

Thank you, I finally figured out how to achieve what i wanted using the get() function, you stated at the begining

arnolds112

is it possible to use for only one of the images in sketch?

   loadPixels();  
 for (int a = 0; a < pixels.length; a++)

  }
  }


  updatePixels(); 
}

arnolds112

i found my answer here https://processing.org/reference/PImage_loadPixels_.html