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Legacy Documentation
Digital Image Processing
(2000)
This is documentation for an obsolete product.
Current products and services
Function Index
ImageThread
ImageThread[
fun
,
img
,
args
]
applies function
fun
to each channel of
img
and threads the arguments
args
.
The length of each supplied argument must match the number of color channels in
img
.
The argument
img
is an
ImageData
expression.
See also User's Guide
2.4
.
Examples
This loads the package.
In[1]:=
Here we read a color test image.
In[2]:=
ImageThread
permits the threading of arguments over the channels of a color image. It is possible, therefore, to apply a different threshold to each of the color channels. Here we effectively remove the green and blue channels. (Note that the following example is for demonstration purposes only, since the
Threshold
command automatically threads lists of threshold values across color channels.)
In[3]:=
Out[3]//InputForm=
In[4]:=
Out[4]=
The following demonstrates how to apply a different filter to each of the color channels of
img
.
In[5]:=
In[6]:=
Out[6]=
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