Esempio n. 1
0
        public void findColor(int R, int G, int B, int formX, int formY)
        {
            string region;
            string colorName;

            // Determine the color region among ROYGBIV + White and Black
            // Evenly divided into 8 smaller cubes.
            if (R <= 128)
            {   // Lower half of the color cube.
                if (G <= 128)
                {
                    if (B <= 128)
                    {
                        region = "Black region";
                    }
                    else
                    {
                        region = "Blue region";
                    }
                }
                else
                {
                    if (B <= 128)
                    {
                        region = "Green region";
                    }
                    else
                    {
                        region = "Cyan region";
                    }
                }
            }
            else
            {   // Higher half of the color cube.
                if (G <= 128)
                {
                    if (B <= 128)
                    {
                        region = "Red region";
                    }
                    else
                    {
                        region = "Magenta region";
                    }
                }
                else
                {
                    if (B <= 128)
                    {
                        region = "Yellow region";
                    }
                    else
                    {
                        region = "White region";
                    }
                }
            }

            Color original = Color.FromArgb(R, G, B);

            // Calculate the distance from the given color to every other color in the table.
            double minDistance = 1;
            double cDistance;
            int index = 0;

            for (int i = 0; i < colorTable.Length; i++)
            {
                cDistance = Math.Sqrt(Math.Pow((R - colorTable[i].red), 2) + Math.Pow((G - colorTable[i].green), 2)
                    + Math.Pow((B - colorTable[i].blue), 2));

                if (0.0 == cDistance)
                {   // Color found! The two points match!
                    colorName = colorTable[i].colorName;
                    Form colorFormExact = new color(true, original, original, region, colorName);
                    colorFormExact.Load += delegate
                    {
                        colorFormExact.Location = new Point(formX, formY);
                    };
                    colorFormExact.Show();
                    return;
                }

                if (0 == i)
                { // Initialize minDistance
                    minDistance = cDistance;
                }

                if (cDistance < minDistance)
                {   // New minimum.
                    minDistance = cDistance;
                    index = i;
                }
            }

            // Found closest, most similar color.
            Color similar = Color.FromArgb(colorTable[index].red, colorTable[index].green, colorTable[index].blue);
            colorName = colorTable[index].colorName;

            Form colorFormSimilar = new color(false, original, similar, region, colorName);
            colorFormSimilar.Load += delegate
            {
                colorFormSimilar.Location = new Point(formX, formY);
            };
            colorFormSimilar.Show();
        }