March 2020
Intermediate to advanced
366 pages
9h 8m
English
book
OpenCV 4 with Python Blueprints - Second Edition
by Dr. Menua Gevorgyan, Michael Beyeler (USD), Arsen Mamikonyan, Michael Beyeler
Content preview from OpenCV 4 with Python Blueprints - Second Edition
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Understanding pre-trained cascade classifiers
Even better, this approach not only works for faces but also for eyes, mouths, full bodies, company logos; you name it. In the following table, a number of pre-trained classifiers are shown that can be found under the OpenCV install path in the data folder:
|
Cascade classifier types |
XML filenames |
|
Face detector (default) |
haarcascade_frontalface_default.xml |
|
Face detector (fast Haar) |
haarcascade_frontalface_alt2.xml |
|
Eye detector |
haarcascade_eye.xml |
|
Mouth detector |
haarcascade_mcs_mouth.xml |
|
Nose detector |
haarcascade_mcs_nose.xml |
|
Full body detector |
haarcascade_fullbody.xml |
In this chapter, we will only use haarcascade_frontalface_default.xml and haarcascade_eye.xml ...