Face Detector is a program developed in C as a set of tools for Baby Builder solution.  We created a Web Service accepting images as input, doing face recognition then exposing the results as JSON data. Such results were rendered in the front-end.

Face Detector was a challenge solution since not similar solution were in market, so we created a first one from scratch.  We used openCV library to achieve that goal and open source haarcascades. In a learning-by-doing procedure we used this approach:

• Loading the image in memory
• Resize greater images to a predefined width and height
• Converting the image to gray-scale
• Normalize image's brightness and increases contrast
• Running our algorithm to recognize faces
• Expose results

Of course with such approach fake recognition were possible on pictures, but Face Detector is smart enough to avoid them.
^{* Screen shots provided also include fake detection.}

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Several technologies where used, among others

• C/C++
• OpenCV
• Cascades
• Linux
• JSON
• Web Services