# Monsters

**R – Fronkonstin**, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)

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Ooh, see the fire is sweepin’

Our very street today

Burns like a red coal carpet

Mad bull lost its way

(Gimme Shelter, The Rolling Stones)

After following this easy tutorial, you will be able to create *tiled* images from a photograph. You may want to use your own portrait or some other as I did. I use `geom_tile`

: one of my preferred geometries of `ggplot`

, which was the one I used in some other experiments like space invaders or Newton’s fractals. I used original photos from some of the most terrific monsters of the cinema: Frankenstein, Dracula and The Mummy. I love how *rough *squares create textures and sense of depth. This is Frankenstein after the transformation:

The process is quite simple:

- Load the image and convert it to grayscale. I use
`imager`

, a very useful and easy to use package for image processing with R. - Reduce the resolution of the image as well as its dimension. Each new (big) pixel is
*summarized*with the mean of the grayscale values of the pixels inside it. - Divide these average values into a number of groups using
`cut`

function. - Represent pixels with
`ggplot`

, using`geom_tile`

. There are two important parameters: size and color of lines of each tile. Both of them depend on the value of the group previously calculated in which*falls*the tile. The graph is composed layer by layer depending on these gropus.

This is Dracula after being *tiled*:

And this is The Mummy:

These are the stunning original images (I love them all):

You can find the code here: let me know if you do something with it.

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**R – Fronkonstin**.

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