# R: k-Means Clustering on an Image

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Enough with the theory we recently published, let’s take a break and have fun on the application of Statistics used in Data Mining and Machine Learning, the

We will utilize the following packages for input and output:

The image is represented by large array of pixels with dimension

Plot the clustered colours:

Possible clusters of pixels on different

I suggest you try it!

*k*-Means Clustering.We will apply this method to an image, wherein we group the pixels intok-means clusteringis a method of vector quantization, originally from signal processing, that is popular for cluster analysis in data mining.k-means clustering aims to partitionnobservations intokclusters in which each observation belongs to the cluster with the nearest mean, serving as a prototype of the cluster. (Wikipedia, Ref 1.)

*k*different clusters. Below is the image that we are going to use,Colorful Bird From Wall321 |

### Download and Read the Image

Let’s get started by downloading the image to our workspace, and tell R that our data is a JPEG file.### Cleaning the Data

Extract the necessary information from the image and organize this for our computation:The image is represented by large array of pixels with dimension

*rows*by*columns*by*channels*— red, green, and blue or RGB.### Plotting

Plot the original image using the following codes:### Clustering

Apply*k*-Means clustering on the image:Plot the clustered colours:

Possible clusters of pixels on different

*k*-Means:I suggest you try it!

### Reference

- K-means clustering.
*Wikipedia*. Retrieved September 11, 2014.

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