OpenImaj - face detection - display found faces

Question

I'm using OpenImaj to detect faces in an image.

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.List;

import org.openimaj.image.FImage;
import org.openimaj.image.ImageUtilities;
import org.openimaj.image.MBFImage;
import org.openimaj.image.colour.Transforms;
import org.openimaj.image.processing.face.detection.DetectedFace;
import org.openimaj.image.processing.face.detection.FaceDetector;
import org.openimaj.image.processing.face.detection.HaarCascadeDetector;

public class FaceDetection {

    public static void main(String[] args) {
        MBFImage image;
        try {
            image = ImageUtilities.readMBF(new FileInputStream("image.jpg"));
            FaceDetector<DetectedFace,FImage> fd = new HaarCascadeDetector(80);
            List<DetectedFace> faces = fd. detectFaces (Transforms.calculateIntensity(image));

            System.out.println(faces.size());
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

To display an image we can use DisplayUtilities class: DisplayUtilities.display(image); However the found face is in type DetectedFace.

Do you know how to display the face which is in the DetectedFace type?

Thank you.

Josip · Answer 1 · 2017-08-31T09:18:18.757

3

In addition to previous answer:

With getFacePatch() you get a face as FImage:

final FImage faceFImage = face.getFacePatch();

Now this faceFImage needs to be converted to BufferedImage:

final BufferedImage bufferedFaceImage = ImageUtilities.createBufferedImage(faceFImage);

Now this bufferedFaceImage can be displayed with:
```
DisplayUtilities.display(bufferedFaceImage);
```

edited Aug 31 '17 at 09:18

answered Aug 31 '17 at 08:26

Josip

75
5

score 1 · Accepted Answer · answered Mar 09 '16 at 19:18

1

You should be able to get an image with getFacePatch().

The documentation is here http://openimaj.org/apidocs/index.html

answered Mar 09 '16 at 19:18

gpasch

2,672
3
10
12

OpenImaj - face detection - display found faces

2 Answers2