[Up] [mmfreedom] Data Type Conversion

mmbinary
Convert a gray-scale image into a binary image

Synopsis

y = mmbinary( f, k1 = 1 )

Implemented in Python.

Input

f Image Unsigned gray-scale (uint8 or uint16), signed (int32) or binary image.

Double

Threshold value.

Default: 1

Output

y	Image Binary image.

Description

mmbinary converts a gray-scale image f into a binary image y by a threshold rule. A pixel in y has the value 1 if and only if the corresponding pixel in f has a value greater or equal k1.

Examples

>>> a = array([0, 1, 2, 3, 4])

>>> b=mmbinary(a)

>>> print b

[0 1 1 1 1]

>>> a=mmreadgray('mm3.tif')

>>> b=mmbinary(a,82)

>>> mmshow(a)

>>> mmshow(b)


a	b

Equation

Source Code
        def mmbinary(f, k1=1):
    from Numeric import array
    if type(f) is not array: f = array(f)
    y = array(f>=k1).astype('1')
    return y
    
      

mmthreshad	Threshold (adaptive)
mmisbinary	Check for binary image
mmgray	Convert a binary image into a gray-scale image.

[Up] [`mmfreedom`]
Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center.

mmbinary Convert a gray-scale image into a binary image