Image color palette replacement

June 9, 2011

(This article was first published on me nugget, and kindly contributed to R-bloggers)

Here is an example of a function I wrote to change the color palette used in an image. The above example comes from a black and white original, although color images can also be used. The function first converts the image to grayscale in order to have levels of color intensity between 0-255. Using a new color palette with 256 color levels, the gray levels are replaced with a rgb (red, blue, green) vector from the new palette. The results can be very strange…
The package biOps is required for reading and writing the .jpeg files.

the function…
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