In this post I will explain how to find a crude approximation to the focal length of a webcam or cell phone camera ( i.e. fixed focal length cameras ) if calibration is not an option or if you are too ...
Latest From the Blog
Configuring Qt for OpenCV on OSX
In this tutorial we will learn how to configure Qt to use OpenCV. Although the tutorial is targeted for OSX users, you can modify my suggestions for use in Linux and Windows. I assume you have a ...
Rotation Matrix To Euler Angles
In this post I will share code for converting a 3x3 rotation matrix to Euler angles and vice-versa. 3D rotations matrices can make your head spin. I know it is a bad pun but truth can sometimes be ...
Speeding up Dlib’s Facial Landmark Detector
In this tutorial I will explore a few ways to speed up Dlib's Facial Landmark Detector. Dlib's Facial Landmark Detector Dlib has a very good implementation of a very fast facial landmark ...
Warp one triangle to another using OpenCV ( C++ / Python )
In this tutorial we will see how to warp a single triangle in an image to another triangle in a different image. In computer graphics people deal with warping triangles all the time because any 3D ...
Average Face : OpenCV ( C++ / Python ) Tutorial
In this tutorial we will learn how to create an average face using OpenCV ( C++ / Python ). Most people would agree that the woman in Figure 1 is pretty. Can you guess her ethnicity ? Why is her ...
