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mmneg
Negate an image.

Synopsis

y = mmneg ( f )

Input

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

Output

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

Description

mmneg returns an image y that is the negation (i.e., inverse or involution) of the image f. In the binary case, y is the complement of f.

Examples

f=uint8([255, 255, 0, 10, 20, 10, 0, 255, 255])
print mmneg(f)
[  0   0 255 245 235 245 255   0   0]
print mmneg(uint8([0, 1]))
[255 254]
print mmneg(int32([0, 1]))
[ 0 -1]
Binary image:
a = mmreadgray('gear.tif')
b = mmneg(a)
mmshow(a)
mmshow(b)
a b
Gray-scale image:
c = mmreadgray('astablet.tif')
d = mmneg(c)
mmshow(c)
mmshow(d)
c d

Equation

See also

mmfreedom Control automatic data type conversion.
mmsubm Subtraction of two images, with saturation.
mmlimits Get the possible minimum and maximum of an image.
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