» DetectObject (FreeFrame DShow9)
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

DetectObject (FreeFrame DShow9)

Help
Author
Info This node comes with the addon pack. Get it here.

Here you are supposed to see an image (rendered with SVG) describing the pins of this node. However, this does not work with Internet Explorer. You may want to consider using another browser, like FireFox, Chrome, Safari or Opera that do support SVG.

Credits
Warnings
Bugs

related discussions

start a forum thread about this node

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)

anonymous user login

Shoutbox

~11h ago

joreg: @guest glad you asked, start reading here: getting started

~19h ago

guest: aLsO tHiS Is BroKeN, ThE ChArAcTeRs AlOud iS a LiE !!!!!!!!!

~19h ago

guest: How Do you understand the inner workings behind the controls of the vvvv technology http//:programming/ult22#howto_@questions.org ??

~7d ago

tonfilm: @hadesbry latest version supporting win XP is 34.2: vvvv45beta34.2

~7d ago

hadesbry: hi, which versión of vvvv is better for win XP. thanks a lot.

~8d ago

joreg: reminder #vvvv heads in #berlin: today, tuesday, june 12th, 19h30: berlin-vvvv-meetup #meetup

~9d ago

ectrome: @joreg working! thanks