[問題] RGB轉HSI

[willy01 (怕慶狗)]

如果用彩色圖形RGB轉成HSI彩色圖形不是看起來會一樣嗎?

可以請各位大大幫忙我看一下CODE嗎? 我哪裡有錯...可以執行 但執行出來的結
果好像是錯的

        private void button6_Click(object sender, EventArgs e)
        {
            try
            {
                Bitmap p6 = (Bitmap)pictureBox2.Image;
                int h_rgb = p6.Height;
                int w_rgb = p6.Width;
                double tempD;
                double theta;


                int trans_h;
                int trans_s;
                int trans_i;
                int tempB;

                for (int i = 0; i < w_rgb; i++)
                {
                    for (int j = 0; j < h_rgb; j++)
                    {
                        //rgb轉H
                        Color c = p6.GetPixel(i, j);
                        int r = c.R;
                        int g = c.G;
                        int b = c.B;
                        theta = Math.Acos(0.5 * ((r - g) - (r - b)) /
Math.Sqrt((r - g) * (r - g) + (r - b) * (g - b))) / (2 * Math.PI);
                        tempD = (b <= g) ? theta : (1 - theta);
                        tempD = (byte)(tempD*255);
                        trans_h = Convert.ToInt32(tempD);
                        //RGB轉S

                        tempB = Math.Min(r, g);
                        tempB = Math.Min(tempB, b);
                        tempD = 1.0 - 3.0 * tempB / (r + g + b);
                        tempD = (byte)(tempD*255);

                        trans_s = Convert.ToInt32(tempD);



                        //RGB轉成I
                        tempD = (r + g + b) / 3;
                        tempD = (byte)(tempD) ;
                        trans_i = Convert.ToInt32(tempD);

                        p6.SetPixel(i, j, Color.FromArgb(trans_h, trans_h,
trans_i));
                    }
                }
                //5.傳回
                pictureBox2.Image = p6;



            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }



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◆ From: 163.25.118.131
→ leo60037:色彩空間轉換的目的, 不是把轉完的值給bitmap
→ leo60037:而是轉換後, 做一些適合在另一個色彩空間的處理之後
→ leo60037:再轉回rgb給bitmap
→ joetime:感覺用color指令來做點陣圖的像素值擷取會很慢
→ joetime:而且hsi主要是代表此色彩空間亮彩分離的特性
→ joetime:你把hsi的數值直接帶入rgb的點陣圖的像素值當然會錯阿
→ joetime:已經是不同的東西了
→ willy01:喔喔~~大概知道了 我一直以為要把圖再丟回給 bitmap