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DetectObject (FreeFrame DShow9)

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about DetectObject (FreeFrame DShow9)

open source

usage

DetectObject is simply a wrapper around the openCV function cvHaarDetectObjects.

DetectObject finds rectangular regions in the given image that are likely to contain objects the cascade has been trained for and returns those regions as a sequence of rectangles. DetectObject scans the image several times at different scales (-> Scale Cascade). Each time it considers overlapping regions in the image and applies the classifiers to the regions. It may also apply some heuristics to reduce number of analyzed regions, such as Canny pruning. After it has proceeded and collected the candidate rectangles (regions that passed the classifier cascade), it groups them and returns a sequence of average rectangles for each large enough group. The default parameters:

  • Scale Cascade = 0.1
  • Min Neighbours = 3
  • Canny Pruning = 0

are tuned for accurate yet slow face detection. For faster face detection on real video images the better settings are:

  • Scale Cascade = 0.2
  • Min Neighbours = 2
  • Canny Pruning = 1

text adopted from:
Emgu CV Library Documentation

Training Files

training files and an application to create those files are shipped with openCVhttp://sourceforge.net/projects/opencvlibrary

there is a wiki with some haarcascade training files for different purposes.

Links

OpenCVwiki

release info

  • 17 06 07
    • added Unique IDs and Lifetime pins (development sponsored by dotdotdot)

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Shoutbox

~2d ago

joreg: @mediadog they are here: workshop-videotracking-node10

~3d ago

mediadog: Hmmm slides for node10 video tracking cannot be found: workshop-videotracking-slides

~4d ago

joreg: @mediadog thanks for the pointer, links are updated

~4d ago

mediadog: Where are the 50beta42 offline instalers? The offline installers are still linked to 41, not 42.

~8d ago

id144: thanks @gegenlicht & @bjoern, i hope the festival sorted it.

~10d ago

Patxi7: @joreg done

~11d ago

joreg: @neuston @u7angel can you please start a forum thread describing the problem you're having with a few more words?

~11d ago

u7angel: @neutron, same here