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Implemented in Python.
y | Image Unsigned gray-scale (uint8 or uint16), signed (int32) or binary image. |
mmaddm creates the image
y
by pixelwise addition of images
f1
and
f2
. When the addition of the values of two pixels saturates the image data type considered, the greatest value of this type is taken as the result of the addition.
>>> f = uint8([255, 255, 0, 10, 0, 255, 250])
>>> g = uint8([ 0, 40, 80, 140, 250, 10, 30])
>>> y1 = mmaddm(f,g)
>>> print y1
[255 255 80 150 250 255 255]
>>> y2 = mmaddm(g, 100)
Warning: Converting input image from int32 to uint8.
>>> print y2
[100 140 180 240 255 110 130]
def mmaddm(f1, f2): from Numeric import array, minimum, maximum if type(f2) is array: assert f1.typecode() == f2.typecode(), 'Cannot have different datatypes:' y = maximum(minimum(f1.astype('d')+f2, mmlimits(f1)[1]),mmlimits(f1)[0]) y = y.astype(f1.typecode()) return y
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Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center. |