private void kmeans()
{
// Retrieve the number of clusters
int k = (int)numClusters.Value;
// Load original image
Bitmap image = Properties.Resources.leaf;
// Create conversors
ImageToArray imageToArray = new ImageToArray(min: -1, max: +1);
ArrayToImage arrayToImage = new ArrayToImage(image.Width, image.Height, min: -1, max: +1);
// Transform the image into an array of pixel values
double[][] pixels; imageToArray.Convert(image, out pixels);
// Create a K-Means algorithm using given k and a
// square euclidean distance as distance metric.
KMeans kmeans = new KMeans(k, Distance.SquareEuclidean);
// Compute the K-Means algorithm until the difference in
// cluster centroids between two iterations is below 0.05
int[] idx = kmeans.Compute(pixels, 0.05);
// Replace every pixel with its corresponding centroid
pixels.ApplyInPlace((x, i) => kmeans.Clusters.Centroids[idx[i]]);
// Show resulting image in the picture box
Bitmap result; arrayToImage.Convert(pixels, out result);
pictureBox.Image = result;
}
