Abs 95 lib/gocr/otsu.c if (Abs(*np-op1)>maxc) maxc=Abs(*np-op1); /* new maximum contrast */ Abs 96 lib/gocr/otsu.c if (Abs(*np-op2)>maxc) maxc=Abs(*np-op2); /* new maximum contrast */ Abs 110 lib/gocr/otsu.c if (Abs(*np-op1)>maxc/4 Abs 111 lib/gocr/otsu.c || Abs(*np-op2)>maxc/4)