delivering business value through it face feature detection using java and opencv 1
TRANSCRIPT
![Page 1: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/1.jpg)
Delivering Business Value through IT
Face feature detection using Java and OpenCV
1
![Page 2: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/2.jpg)
Delivering Business Value through IT
Content
▪What is OpenCV?
▪What is face detection and haar cascade classifiers?
▪How to make face detection in Java using OpenCV
▪Live Demo
▪Problems in face detection process
▪How to improve face detection
2
![Page 3: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/3.jpg)
Delivering Business Value through IT
What is OpenCV ?
▪OpenCV (Open Source Computer Vision Library)
• is an open source computer vision
• and machine learning software library.
▪The library has more than 2500 optimized algorithms used for:• Recognize faces• Identify objects• Image matching• Track camera movements• Track moving objects• Tracking eyes movements• Recognize scenery
3
![Page 4: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/4.jpg)
Delivering Business Value through IT
What is OpenCV ?
▪Very large community and millions of downloads
▪OpenCV supports Java, C++, C, Python and Matlab
▪OpenCV runs on different platform
•(Windows,Linux,Android,iOS,Blackberry …)
▪It is used by big companies such as
•Google, Microsoft, Intel, IBM, Sony, Toyota, nVidia, Honda …
▪Easy to use and install
4
![Page 5: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/5.jpg)
Delivering Business Value through IT
Face detection and Haar Cascade Classifiers
▪What is face detection?
▪What are Haar Feature – based Cascade Classifiers?
▪You can train your own files
5
![Page 6: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/6.jpg)
Delivering Business Value through IT
Face detection and Haar Cascade Classifiers
• Dramatically increases the speed of the detector by focusing attention on promising regions of the image
• OpenCV's algorithm is currently using the following Haar-like features which are the input to the basic classifiers:
6
![Page 7: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/7.jpg)
Delivering Business Value through IT
Face detection and Haar Cascade Classifiers
OpenCV already contains many pre-trained classifiers for:
• Eyes• Nose• Mouth• Face• Smile• Body• Profile face• Frontal face• …...
7
![Page 8: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/8.jpg)
Delivering Business Value through IT
Make face detection using Java and OpenCV
▪Load OpenCV driver• System.load(‘path-to-the-driver/driver-name’);
▪Load haar cascade classifier• CascadeClassifier classifier = new CascadeClassifier(‘path-to-the-
classifier’);
▪Detect face feature and return position of the detected feature in the original image
• MatOfRect detections = new MatOfRect(); classifier.detectMultiScale(source, detections);
8
![Page 9: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/9.jpg)
Delivering Business Value through IT
Live Demo
9
![Page 10: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/10.jpg)
Delivering Business Value through IT
Problems with detection
▪ Bad lightening
▪ Bad image quality
▪ Sometimes can detect more than two eyes or noses
▪ Sometimes can detect two eyes on one eye
▪ Face features detection on wrong places
▪
10
![Page 11: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/11.jpg)
Delivering Business Value through IT
How to improve face feature detection
▪Convert the image in black and white format
▪Use regions of interest on the face• Example: If you want to detect eyes, cut the image around the eyes and
then run eyes detection
▪Try different trained haar cascade xml files
▪Add common logic in iterating detected arrays
11
![Page 12: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/12.jpg)
Delivering Business Value through IT
Conclusion
▪It is free to use for both personal and business proposes, •only several algorithms are patented, but they are marked as non free.
▪It is easy to use in Java, just a few lines of code
▪Can be implemented in various applications •because it offers a lot of functionalities and algorithms.
12
![Page 13: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/13.jpg)
Delivering Business Value through IT
QUESTIONS
13
![Page 14: Delivering Business Value through IT Face feature detection using Java and OpenCV 1](https://reader036.vdocuments.site/reader036/viewer/2022081514/5697bfdf1a28abf838cb27cc/html5/thumbnails/14.jpg)
Delivering Business Value through IT
Thanks to all employees in Polar Cape Macedonia that were included in researching and investigating OpenCV
14