This is a Java port of Rob Hess' implementation of SIFT that I did for a project @ work.
However, I couldn't port the actual extraction of SIFT descriptors from images as it relies very heavily on OpenCV. So actually all that I ported to native Java is the KD-Tree features matching part, and the rest is in JNI calls to Rob's code.
I wrote this more as a tutorial to Rob's work, with an easy JNI interface to Java.
You can find the sources here: http://www.morethantechnical.com/extupload/code/JavaSIFT.zip
Here's how to use it:
Continue reading "Porting Rob Hess's SIFT impl. to Java"
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I recently did a small project combining a Java web service with a OpenCV processing. I tried to transfer the picture from Java environment (as BufferedImage) to OpenCV (IplImage) as seamlessly as possible. This proved a but tricky, especially the Java part where you need to create your own buffer for the image, but it worked out nicely.
Let me show you how I did it
Continue reading "Combining Java's BufferedImage and OpenCV's IplImage"
Just wanted to report on a breakthrough in my iPhone-CV digging. I found a true realtime frame grabber for the iPhone preview frame (15fps of ~400x300 video), and successfully integrated this video feed with a pure C++ implementation of the MeanShift tracking algorithm. The whole setup runs at realtime, under a few constraints of course, and gives nice results.
Update: Apple officially supports camera video pixel buffers in iOS 4.x using AVFoundation, here's sample code from Apple developer.
So lets dig in...
Continue reading "iPhone camera frame grabbing and a real-time MeanShift tracker"
I havn't published in a while. I was back up with work on a project for uni., work and my writing...
But the good thing with keeping busy, is that after a while - you have something to show for! So here's what i've been working on for Comp. Graphics course - A Ray Tracer.
Continue reading "Tracing wild rays"