//sharpen with 3x3, 5x5 and 7x7
public void onMatrixSharpen()
{
Bitmap tmp1, tmp2, tmp3;
Bitmap[] arr = new Bitmap[3];
tmp1 = (Bitmap)model.getImage().Clone();
tmp2 = (Bitmap)model.getImage().Clone();
tmp3 = (Bitmap)model.getImage().Clone();
arr[0] = Sharpen.FilterSharpen3(tmp1);
arr[1] = Sharpen.FilterSharpen5(tmp2);
arr[2] = Sharpen.FilterSharpen7(tmp3);
model.setChannels(arr);
view.showPictures(model.getImage(), model.getChannels());
}