March 2019
Intermediate to advanced
538 pages
13h 38m
English
book
Building Computer Vision Projects with OpenCV 4 and C++
by David Millan Escriva, Prateek Joshi, Vinicius G. Mendonca, Roy Shilkrot
Content preview from Building Computer Vision Projects with OpenCV 4 and C++
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Implementing face detection using OpenCV cascade classifiers
As mentioned previously, OpenCV v2.4 comes with various pretrained XML detectors that you can use for different purposes. The following table lists some of the most popular XML files:
| Type of cascade classifier | XML filename |
| Face detector (default) | haarcascade_frontalface_default.xml |
| Face detector (fast Haar) | haarcascade_frontalface_alt2.xml |
| Face detector (fast LBP) | lbpcascade_frontalface.xml |
| Profile (side-looking) face detector | haarcascade_profileface.xml |
| Eye detector (separate for left and right) | haarcascade_lefteye_2splits.xml |
| Mouth detector | haarcascade_mcs_mouth.xml |
| Nose detector | haarcascade_mcs_nose.xml |
| Whole person detector | haarcascade_fullbody.xml |