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Legacy Documentation

Digital Image Processing (2000)

This is documentation for an obsolete product.

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Function Index

LookupTable

LookupTable[{y₁, y₂, ...}] returns a dispatch table of point mappings defined by the list of rules {0→y₁, 1→y₂, ...}.

LookupTable[{x₁, x₂, ...}, {y₁, y₂, ...}] returns a dispatch table of point mappings defined by the list of rules {x₁→y₁, x₂→y₂,...}.

LookupTable may be used to apply an arbitrary point transformation to an image.

Option DispatchTableForm→False omits the formation of a dispatch table returning a result in the form of a simple list of rules. This may be useful when joining multiple lookup tables.

Example

This loads the package.

In[1]:=

This produces a color map consisting of a range of hues.

In[2]:=

Out[2]=

This reads a monochrome example image and quantizes it to 8 gray levels.

In[3]:=

This applies the color map to the example image.

In[4]:=

Out[4]=