Numpy set range where less than - 


def updatemap(depthmap, p1, p2, value):     maps = depthmap[0:580,p1[0]:p2[0]]     maps[maps < value] = value     depthmap[0:580,p1[0]:p2[0]] = maps

this current way it. requires make copy of range, set range value less than, copy back. copying make slow. there syntax can use?

assuming depthmap numpy array, part:

maps = depthmap[0:580,p1[0]:p2[0]]

doesn't make copy. unlike lists , tuples, numpy slicing creates view of original array. thus, next line:

maps[maps < value] = value

modifies original depthmap array, , line after that:

depthmap[0:580,p1[0]:p2[0]] = maps

is superfluous. can remove it:

def updatemap(depthmap, p1, p2, value):     maps = depthmap[0:580,p1[0]:p2[0]]     maps[maps < value] = value

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