3. An improvement in the improvement of claim 2, wherein said evaluation indices comprise: ##EQU11## where: B.sub.D is a stain bit-matrix, and B.sub.K is a cut bit-matrix.
3. An improvement in the improvement of claim 2, wherein said evaluation indices comprise: ##EQU11## where: B.sub.D is a stain bit-matrix, and B.sub.K is a cut bit-matrix. 4. An improvement in the improvement of claim 3, wherein there is included means for rejecting during said recognizing if equations D.sub.TI .ltoreq.D.sub.T3 and .vertline.D.sub.T2 -D.sub.T1 .vertline..gtoreq.D.sub.T4 are not satisfied, where D.sub.T is a total dissimilarity quantity.