setROI()

[isemechkov]

Hi, please, i need help. At me it is impossible to understand from functions setROI(). It is necessary to look for eyes in a face, I send parameters of the person to function opencv_eyes.setROI(face_x, face_y, face_width,face_height), and eyes are not on a face (pic "ROI apply.png"). If I comment on a line "opencv_eyes.setROI(face_x, face_y, face_width,face_height);", all ok (pic "ROI coment.png").

What do I do not so?
With respect for Strunkin Stepan.

roi apply

roi coment

sketch_to_Greg.zip

sketch:
//-----------------------------------------------------------------------------------------------------------------------------
import processing.video.;
import gab.opencv.;
import java.awt.Rectangle;

OpenCV opencv_face, opencv_eyes;
Rectangle[] faces, eyes;

int face_x, face_y, face_width, face_height;

Capture webcam;

void setup() {
size(320, 240);

String[] webcameras = Capture.list();

if (webcameras.length == 0) {
println("There are no webcameras available for capture.");
exit();
} else {
println("Available webcameras:");
for (int i = 0; i < webcameras.length; i++) {
println(webcameras[i]);
}

// The webcamera can be initialized directly using an
// element from the array returned by list():
webcam = new Capture(this, webcameras[4]); // 32024030
webcam.start();

opencv_face = new OpenCV(this, width, height);
opencv_eyes = new OpenCV(this, width, height);

opencv_face.loadCascade(OpenCV.CASCADE_FRONTALFACE);
opencv_eyes.loadCascade(OpenCV.CASCADE_EYE);

};
}

void draw() {
if (webcam.available() == true) {
webcam.read();
opencv_face.loadImage(webcam);
opencv_eyes.loadImage(webcam);
image(opencv_eyes.getInput()/webcam/, 0, 0);

faces = opencv_face.detect(1.2, 3, 0, 80, 250);   
    
noFill();
stroke(0, 255, 0);
strokeWeight(2);
for (int i = 0; i < faces.length; i++) {  
  face_x = faces[i].x;
  face_y = faces[i].y;
  face_width = faces[i].width;
  face_height = faces[i].height;
  rect(faces[i].x, faces[i].y, faces[i].width, faces[i].height);           
}
 
 opencv_eyes.setROI(face_x, face_y, face_width,face_height);
 eyes = opencv_eyes.detect(1.2, 3, 0, 20, 100);
 
 for( int j=0; j<eyes.length; j++ ) {
   rect( eyes[j].x, eyes[j].y, eyes[j].width, eyes[j].height );
 }

}

}