CODEWITHSUNDEEP
opencv
Lê Quang Duy
Lê Quang Duy

Reputation: 787

Explanation about cascade xml file lbpcascade_frontalface.xml

I've been searching the Internet for 2 weeks, but I could not find the answer I need.

I'm learning about Local Binary Pattern in Face Detection and I want to build an app to detect face in image without using OpenCV classes, I mean I want to build my own class(es).

I see this xml file "lbpcascade_frontalface.xml" in openCV. I think this file is used to recognize face by Local Binary Pattern algorithm, so I want to use it to recognize face in image, but I don't understand about data nodes.

What do they mean? How to use them? Especially data in leafValues and internalNodes tags

<stages>
<!-- stage 0 -->
<_>
  <maxWeakCount>3</maxWeakCount>
  <stageThreshold>-0.7520892024040222</stageThreshold>
  <weakClassifiers>
    <!-- tree 0 -->
    <_>
      <internalNodes>
        0 -1 46 -67130709 -21569 -1426120013 -1275125205 -21585
        -16385 587145899 -24005</internalNodes>
      <leafValues>
        -0.6543210148811340 0.8888888955116272</leafValues></_>

I'm sorry if my English is not good.

Upvotes: 2

Views: 3765

Answers (1)

zorze
zorze

Reputation: 198

These nodes are the connecting dots of a facial layout. This xml exactly defines a front-face layout in terms of the dots ie:- there are dots defined for the pupil, right-cheek, left temple etc.

Upvotes: 1

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