Fw: [問題] C# 存picture box問題

[sky391 (sky)]

※ [本文轉錄自 C_and_CPP 看板 #1L4wqcPN ]

作者: sky391 (sky) 看板: C_and_CPP
標題: [問題] C# 存picture box問題
時間: Thu Mar 26 14:54:28 2015

開發平台(Platform): (Ex: VC++, GCC, Linux, ...) VC++

問題:
目前讀圖進來然後做了影像處理顯示在picture box 然後把picture box儲存
結果存的圖還是原本讀圖的那張,第一次使用C# 不知道是否存錯?

Code 貼上影像處理到存圖部分

        private void button2_Click_1(object sender, EventArgs e)
        {
            Bitmap b = pictureBox1.Image as Bitmap;
            if (b == null)
            {
                MessageBox.Show("請載入圖片", "error");                  //
if user don't load file will return
                return;
            }
            int width = b.Width;
            int height = b.Height;
            BitmapData bd = b.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
            IntPtr imgPtr = bd.Scan0;
            int stride = bd.Stride;
            int widthByte = width * 3;
            int skipByte = stride - widthByte;
            int[, ,] rgbData = new int[width, height, 3];

            double[] Blend_value = new double[50] { 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
            double s, sum = 1;
            double s_state = 1;
            int blend_width = 50;
            s = (double)1 / blend_width;
            //-----------------
            for (int counter = 1; counter < blend_width;counter++ )
            {
                if (counter < blend_width * 0.5)
                {
                    s_state = s_state - s;

                    sum = 0.5 * System.Math.Pow(2*(1 - s_state), 1.2);
                    Blend_value[counter] = sum;
                }
                else
                {
                    s_state = s_state - s; ;
                    sum =1- (0.5 * System.Math.Pow(2 * s_state, 1.2));
                    Blend_value[counter] = sum;
                }

            }

            //-----------------
            #region 讀取 RGB 資料
            unsafe
            {
                byte* p = (byte*)(void*)imgPtr;
                for (int j = 0; j < height; j++)
                {
                    for (int i = 0; i < width; i++)
                    {
                        rgbData[i, j, 2] = p[0];
                        p++;
                        rgbData[i, j, 0] = p[0];
                        p++;
                        rgbData[i, j, 1] = p[0];
                        p++;
                    }
                    p += skipByte;
                }
            }
            #endregion
            #region 影像處理
            unsafe
            {
                imgPtr = bd.Scan0;
                byte* p = (byte*)(void*)imgPtr;
                for (int j = 0; j < height; j++)
                {
                    for (int i = 0; i < width; i++)
                    {

                        double r = rgbData[i, j, 0] * Blend_value[i];
                        double g = rgbData[i, j, 1] * Blend_value[i];
                        double gg = rgbData[i, j, 2] * Blend_value[i];
                        p[0] = (byte)g;
                        p++;
                        p[0] = (byte)r;
                        p++;
                        p[0] = (byte)gg;
                        p++;
                    }
                    p += skipByte;
                }
            }

            #endregion
            b.UnlockBits(bd);
            Refresh();

        }

        private void button3_Click(object sender, EventArgs e)
        {

            Bitmap DrawArea;
                DrawArea = new Bitmap(pictureBox1.Size.Width,
pictureBox1.Size.Height);
                Graphics g;
                g = Graphics.FromImage(DrawArea);
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "Bitmap Image|*.bmp";
            saveFileDialog1.Title = "Save an Image File";
            saveFileDialog1.ShowDialog();
            if (saveFileDialog1.FileName != "")
            {
                System.IO.FileStream fs =
(System.IO.FileStream)saveFileDialog1.OpenFile();
                pictureBox1.Image.Save(Application.ExecutablePath +
"11111.bmp");
                switch (saveFileDialog1.FilterIndex)
                {
                    case 1:
                        this.pictureBox1.Image.Save(fs,
                                  System.Drawing.Imaging.ImageFormat.Bmp);
                        break;
                }

                fs.Close();
            }

        }



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→ james732: 問錯板了，請洽 C_Sharp
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※ 發信站: 批踢踢實業坊(ptt.cc)
※ 轉錄者: sky391 (125.231.58.247), 03/26/2015 17:59:29
→ GoalBased: 整片code也不整理就貼上來..
→ feeya: pictureBox.image = (Bitmap) bmp; // 用法是這樣
→ sky391: 謝謝各位 已解決