Recently I stumbled upon an interesting open source framework called OpenALPR (Automated License Plate Recognition). This seemed very interesting for trying out on the Raspberry PI. The OpenALPR framework has a couple of dependencies that you have to download and compile first.
Recently I have received the Raspberry Pi, Model B. I wanted to try out the OpenCV framework on the Pi. After installing OpenCV and all dependencies I tested something similar to iOS OpenCV Sample I wrote a while back. The project shows detection of a yellow circular shaped objects, face and smile detection. The code is written in Python. With Raspberry Pi I have used a low cost usb web camera I had lying around.
Face tracking turret uses OpenCV framework for face recognition, the project is written in Python. The face center coordinate is sent via serial interface to Arduino. The coordinate is translated into horizontal and vertical angles that are used to position the servos on the pan/tilt mount.
Recently I’ve implemented some of the OpenCV functionality in an iOS project. Based on that, I have created a sample project with object recognition and general image processing. The sample project is based around the AbstractOCVViewController class with main image capture and transformation from iOS captured image to OpenCV IplImage object. An AbstractOCVViewController subclass needs to override and implement the didCaptureIplImage: method. The captured and processed IplImage object is passed here as a parameter. After image manipulation using the OpenCV framework, the didFinishProcessingImage: method is called. The method will handle the transformation and presentation of the IplImage in an UIImageView. There are three samples in this project – color circle detection, smile detection and image blur detection so you can try and test OpenCV yourself.
You may check the sample project at my GitHub repo:
Real and threshold images:
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