Object Detection - Haar Cascade / LBP Cascade / HOG Descriptor - Result Value

please explain, how you get this number

For Haar Cascade (I remember), it is the levelWeights value from a version of the .DetectMultiScale() function:

http://docs.opencv.org/5.x/d1/de5/classcv_1_1CascadeClassifier.html#a1a5884c8cc749422f9eb77c2471958bc