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Viola Jones algorithmのトレーニング段階を理解している問題があります。Viola Jones/AdaBoostの学習段階
私は限り私はそれを理解し、擬似コードでアルゴリズムを与える:
# learning phase of Viola Jones
foreach feature # these are the pattern, see figure 1, page 139
# these features are moved over the entire 24x24 sample pictures
foreach (x,y) so that the feature still matches the 24x24 sample picture
# the features are scaled over the window from [(x,y) - (24,24)]
foreach scaling of the feature
# calc the best threshold for a single, scaled feature
# for this, the feature is put over each sample image (all 24x24 in the paper)
foreach positive_image
thresh_pos[this positive image] := HaarFeatureCalc(position of the window, scaling, feature)
foreach negative_image
thresh_neg[this negative image] := HaarFeatureCalc(position of the window, scaling, feature)
#### what's next?
#### how do I use the thresholds (pos/neg)?
これはところで、こののようにフレームがSOの質問です:Viola-Jones' face detection claims 180k features
このアルゴリズムはHaarFeatureCalc-関数を呼び出します私は理解していると思います:
function: HaarFeatureCalc
threshold := (sum of the pixel in the sample picture that are white in the feature pattern) -
(sum of the pixel in the sample picture that are grey in the feature pattern)
# this is calculated with the integral image, described in 2.1 of the paper
return the threshold
これまでの間違いはありますか?
Viola Jonesの学習フェーズでは、基本的にどのフィーチャ/ディテクタが最も重要かを検出します。私はAdaBoostの仕組みを理解していません。
質問:このAdaBoostはどのようにして擬似コードのように見えますか?
はmetaoptimizeでml関連の質問をしています。この質問はそこにもっと適しています:) – Fraz
私は、http://metaoptimize.com/qa/questions/9931/learning-phase-of-viola-jones-adaboost –