public static Bitmap FilterContrastColor(Bitmap b, PomocnaStruktura p)
		{
			if (p.kontrast < -100) p.kontrast = -100;
			if (p.kontrast > 100) p.kontrast = 100;
			if (p.crvena < -255) p.crvena = -255;
			if (p.crvena > 255) p.crvena = 255;
			if (p.plava < -255) p.crvena = -255;
			if (p.plava > 255) p.crvena = 255;
			if (p.zelena < -255) p.crvena = -255;
			if (p.zelena > 255) p.crvena = 255;

			double pixel = 0;
			double nPixel;
			double contrast = (100.0 + p.kontrast) / 100.0;
			contrast *= contrast;
			double red = p.crvena;
			double green = p.zelena;
			double blue = p.plava;

			for (int i = 0; i < b.Width; i++)
			{
				for (int j = 0; j < b.Height; j++)
				{
					System.Drawing.Color color = b.GetPixel(i, j);

					double conRed, conGreen, conBlue;
					double colRed, colGreen, colBlue;

					conBlue = color.B;
					conGreen = color.G;
					conRed = color.R;

					pixel = ((((conRed / 255.0) - 0.5) * contrast) + 0.5) * 255;
					if (pixel < 0) pixel = 0;
					if (pixel > 255) pixel = 255;
					conRed = (byte)pixel;

					pixel = ((((conGreen / 255.0) - 0.5) * contrast) + 0.5) * 255;
					if (pixel < 0) pixel = 0;
					if (pixel > 255) pixel = 255;
					conGreen = (byte)pixel;

					pixel = ((((conBlue / 255.0) - 0.5) * contrast) + 0.5) * 255;
					if (pixel < 0) pixel = 0;
					if (pixel > 255) pixel = 255;
					conBlue = (byte)pixel;

					nPixel = conRed + red;
					nPixel = Math.Max(nPixel, 0);
					colRed = (byte)Math.Min(255, nPixel);

					nPixel = conGreen + green;
					nPixel = Math.Max(nPixel, 0);
					colGreen = (byte)Math.Min(255, nPixel);

					nPixel = conBlue + blue;
					nPixel = Math.Max(nPixel, 0);
					colBlue = (byte)Math.Min(255, nPixel);

					b.SetPixel(i, j, System.Drawing.Color.FromArgb((int)colRed, (int)colGreen, (int)colBlue));
				}
			}
			return b;
		}