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Fig. 7 | EURASIP Journal on Image and Video Processing

Fig. 7

From: Cascade of Boolean detector combinations

Fig. 7

Symmetrical BOA cascade for laughter detection. Symmetrical BOA cascade, which is capable of making early classification to both classes, realizing of BOA (15) for laughter detection. The conjunction set z2={lA,lV} and the threshold \(\theta _{A}^{min}\) is \(\theta _{A}^{min}=\min \left (\theta _{A}^{1},\theta _{A}^{2,1},\theta _{A}^{2,2},\ldots,\theta _{A}^{2,N}\right)\). \(B_{2}^{0}\) contains K=2N conjunctions, where the first threshold comparison is always \(\left (l_{A}\geq \theta _{A}^{1}\right)\). The comparisons indexed by n = 1…N operate either on lA or lV according to binary (M2-ary) N-digit representation of the conjunction index k = 1…K, bin(k). If the n:th digit of bin(k) is 0, lA is used, and lV is used if the n:th digit of bin(k) is 1

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