AI :: gray-scaled face detector

I tried to make a gray-scaled face detector by using MATLAB 2008. I found that the face-detection algorithm proposed by Rowley, Baluja, and Kanade is very interesting. The face-detector works by finding facial area(s) on images. Just like face detector feature which attached to digital camera, i tried to make the accuracy of my face detector better

The face detector i made, works in neural network basis. The main idea is to search all pixel in images to find facial area by using keyblock. But before that, i trained the neural network so that it would be able to distinguish facial and non-facial area.


Here is some of the detection result from my face-detector:



The result is in RGB mode, while the detection process on gray-scale mode. As you can see, the facial image shown a face size variation. And my face detector also able to detect face and non face images, like dogs.

Next the algorithm :
1. make sliding windows to be looped on every pixel in the image (i use 30x30 sliding windows size)
2. once the loop finished, re-size the image to be smaller with a pre-determined scale-down ratio (i use 0.8)
3. stop when the size of image is smaller than the size of sliding windows.
4. eliminate false detection
5. extract final position result