private void FolderReadThread()
{
DisableAllControls();
List <Color> rgbColorList = new List <Color>();
SetProgressBar(0);
for (int i = 0; i < folderReadFilenames.Length; ++i)
{
Debug.WriteLine(folderReadFilenames[i]);
Bitmap bmp = null;
try { bmp = new Bitmap(folderReadFilenames[i]); }
catch (Exception) { Debug.WriteLine("Could not open " + folderReadFilenames[i]); }
if (bmp != null)
{
Color centerColor = BitmapTool.GetCenterColor(bmp);
Debug.WriteLine("Color is " + centerColor.R + " " + centerColor.G + " " + centerColor.B);
rgbColorList.Add(centerColor);
bmp.Dispose();
}
SetProgressBar((int)((i + 1f) / folderReadFilenames.Length * 100));
}
SetProgressBar(100);
if (rgbColorList.Count == 0)
{
MessageBox.Show("No images found in selected folder.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
SetPreviewColorList(rgbColorList);
}
EnableAllControls();
}
public static void GetColorClusters(Bitmap bmp, ref LABColor[] colors, ref int[] clusterCount, int numClusters, Action progressCallback)
{
Bitmap lowResBmp = BitmapTool.GetLowerResBitmap(bmp, LOW_RES_SIZE);
if (lowResBmp != null)
{
bmp = lowResBmp;
}
LABColor[] labPixelData = GetLABPixelData(bmp);
int numCentroids = numClusters;
LABColor[] centroids = PickKMeansCentroids(numCentroids, labPixelData);
int[] labPixelClosestCentroid = new int[labPixelData.Length];
int[] centroidClusterCount = new int[centroids.Length];
//initialize closest centroids to -1 (no centroid)
for (int p = 0; p < labPixelClosestCentroid.Length; ++p)
{
labPixelClosestCentroid[p] = -1;
}
bool clustersChanged = false;
do
{
Debug.WriteLine("Calculate clusters");
clustersChanged = CalculateClusterChanges(labPixelData, centroids, labPixelClosestCentroid, centroidClusterCount);
RecalculateCentroids(labPixelData, centroids, labPixelClosestCentroid, centroidClusterCount);
progressCallback();
} while (clustersChanged);
for (int c = 0; c < numCentroids; ++c)
{
Debug.WriteLine(centroids[c] + " clustersize:" + centroidClusterCount[c]);
}
float[] LfAvg = new float[numClusters];
for (int p = 0; p < labPixelData.Length; ++p)
{
LfAvg[labPixelClosestCentroid[p]] += labPixelData[p].Lf;
}
for (int c = 0; c < numCentroids; ++c)
{
if (centroidClusterCount[c] > 0)
{
LfAvg[c] /= centroidClusterCount[c];
}
centroids[c].Lf = LfAvg[c];
}
colors = centroids;
clusterCount = centroidClusterCount;
//cleanup
if (lowResBmp != null)
{
lowResBmp.Dispose();
}
}