def execute( width, height, data ):
"""
Converts an image to greyscale.
:Parameters:
width : int
The width of the image being converted
height : int
The height of the image being converted
data : string
A string containing the data for the image
:rtype: tuple
:returns: a tuple containing a width, height, and data as a binary string.
"""
return toGrey( width, height, data )
def execute( width, height, data ):
"""
Changes an image to greyscale and inverts the colors so as to make it
appear more like an x-ray photo.
:Parameters:
width : int
The width of the image being converted
height : int
The height of the image being converted
data : string
A string containing the data for the image
:rtype: tuple
:returns: a tuple containing a width, height, and data as a binary string.
"""
return invert( *toGrey( width, height, data ) )
def execute( width, height, data ):
"""
Converts the colors in an image to resemble a sepia tone photograph.
:Parameters:
width : int
The width of the image being converted
height : int
The height of the image being converted
data : string
A string containing the data for the image
:rtype: tuple
:returns: a tuple containing a width, height, and data as a binary string.
"""
pass1 = toGrey( width, height, data )[ 2 ]
pass2 = channelBrightness( width, height, pass1, ( 0, -18, -35 ) )[ 2 ]
# now adjust the gamma
return gamma( width, height, pass2, brightness=0, contrast=1.1, gamma=0.8 )