Book Image

OpenCV 3.0 Computer Vision with Java

By : Daniel Lelis Baggio
Book Image

OpenCV 3.0 Computer Vision with Java

By: Daniel Lelis Baggio

Overview of this book

Table of Contents (15 chapters)
OpenCV 3.0 Computer Vision with Java
About the Author
About the Reviewers


Although OpenCV is already packaged with several cascade classifiers, there might be a need for detecting some particular object, or class of object, of your choice. Creating a custom cascade classifier is not straightforward since it requires thousands of images from which all the variance should be removed. For instance, if a classifier for faces is being created, all the images should have their eyes aligned. In this section, we will describe the process of creating a cascade classifier using OpenCV.

In order to train a cascade, some tools have been provided in OpenCV. They can be found in the opencv/build/x86/vc11/bin directory. The opencv_createsamples and opencv_traincascade executables are used for preparing a training dataset of positive samples and for generating the cascade classifier, respectively.

In order to give a good idea of the process, we have included files from UIUC Image Database for Car Detection, collected by Shivani Agarwal, Aatif Awan, and Dan Roth. These...