Crop image area by detecting colored pixels (code for a CodeProject answer)

DetectPixels.cs

using System;

namespace DetectPixels
{
    class Color
    {
        // Color components
        public int R, G, B;

        // Set color components
        public void SetColor(int R, int G, int B)
        {
            this.R = R;
            this.G = G;
            this.B = B;
        }

        // Basic check, if the pixel is black
        public bool isBlack()
        {
            if (R == 0 && G == 0 && B == 0)
            {
                return true;
            }

            return false;
        }

        // Routine for output purposes
        public override string ToString()
        {
            return "(" + R.ToString() + "," + G.ToString() + "," + B.ToString() + ")";
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            int width = 4, height = 4;

            Color[,] image = new Color[height, width];

            // Example image:
            //
            // B B B B
            // B C C B
            // B C C B
            // B B B B
            //
            // B - black
            // C - color

            // 1. Line
            image[0, 0] = new Color();
            image[0, 0].SetColor(0, 0, 0);
            image[0, 1] = new Color();
            image[0, 1].SetColor(0, 0, 0);
            image[0, 2] = new Color();
            image[0, 2].SetColor(0, 0, 0);
            image[0, 3] = new Color();
            image[0, 3].SetColor(0, 0, 0);

            // 2. Line
            image[1, 0] = new Color();
            image[1, 0].SetColor(0, 0, 0);
            image[1, 1] = new Color();
            image[1, 1].SetColor(255, 0, 0);
            image[1, 2] = new Color();
            image[1, 2].SetColor(0, 0, 255);
            image[1, 3] = new Color();
            image[1, 3].SetColor(0, 0, 0);

            // 3. Line
            image[2, 0] = new Color();
            image[2, 0].SetColor(0, 0, 0);
            image[2, 1] = new Color();
            image[2, 1].SetColor(0, 255, 0);
            image[2, 2] = new Color();
            image[2, 2].SetColor(255, 255, 0);
            image[2, 3] = new Color();
            image[2, 3].SetColor(0, 0, 0);

            // 4. Line
            image[3, 0] = new Color();
            image[3, 0].SetColor(0, 0, 0);
            image[3, 1] = new Color();
            image[3, 1].SetColor(0, 0, 0);
            image[3, 2] = new Color();
            image[3, 2].SetColor(0, 0, 0);
            image[3, 3] = new Color();
            image[3, 3].SetColor(0, 0, 0);

            // "Show" the image
            Console.WriteLine("Old Image:\n");

            for (int y = 0; y < height; y++)
            {
                for (int x = 0; x < width; x++)
                {
                    Console.Write(image[y, x].ToString() + " ");
                }

                Console.WriteLine();
            }

            Console.WriteLine();

            // Get min, max values
            int minX = 0,
                maxX = 0,
                minY = 0,
                maxY = 0;

            bool gotMin = false;

            for (int y = 0; y < height; y++)
            {
                for (int x = 0; x < width; x++)
                {
                    if (!image[y, x].isBlack())
                    {
                        if (!gotMin)
                        {
                            minX = x;
                            minY = y;

                            gotMin = true;
                        }

                        if (x > maxX) maxX = x;
                        if (y > maxY) maxY = y;
                    }
                }
            }

            // Copy the relevant stuff
            int newWidth = maxX - minX + 1;
            int newHeight = maxY - minY + 1;

            Color[,] newImage = new Color[newHeight, newWidth];

            for (int y = minY; y <= maxY; y++)
            {
                for (int x = minX; x <= maxX; x++)
                {
                    newImage[y - minY, x - minX] = new Color();
                    newImage[y - minY, x - minX].SetColor(image[y, x].R, image[y, x].G, image[y, x].B);
                }
            }

            // "Show" new image
            Console.WriteLine("New Image:\n");

            for (int y = 0; y < newHeight; y++)
            {
                for (int x = 0; x < newWidth; x++)
                {
                    Console.Write(newImage[y, x].ToString() + " ");
                }

                Console.WriteLine();
            }
        }
    }
}