CIGAL Reference Manual, Chapter 3 (Functions): search
Search -- Find 1st image value within given intensity range
usage: vec = search(nmax,v0,dir,loval,hival)
Search along a line of pixels for value >= LOVAL && ⇐ HIVAL.
See Also:
SAMPLE(3),
SIMAGE(4),
THI(4),
TLO(4),
TRACE(3)
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