学习FotoVision 进行C# colorMatrix 对图片的处理 : 亮度调整 抓屏 翻转 随鼠标画矩形

0.FotoVision下载地址

http://www.microsoft.com/downloads/details.aspx?FamilyId=D4738DCA-E95C-4D4F-BF32-00A865006C73&displaylang=en

 

 1.图片亮度处理

private void trackBar1_ValueChanged(object sender, EventArgs e)

{

    //this.numericUpDown1.Value = this.trackBar1.Value;

    int percent = this.trackBar1.Value;

    Single v = 0.006F * percent;

    Single[][] matrix = {

        new Single[] { 1, 0, 0, 0, 0 },

        new Single[] { 0, 1, 0, 0, 0 },

        new Single[] { 0, 0, 1, 0, 0 },

        new Single[] { 0, 0, 0, 1, 0 },

        new Single[] { v, v, v, 0, 1 }

    };

    System.Drawing.Imaging.ColorMatrix cm = new System.Drawing.Imaging.ColorMatrix(matrix);

    System.Drawing.Imaging.ImageAttributes attr = new System.Drawing.Imaging.ImageAttributes();

    attr.SetColorMatrix(cm);

    //Image tmp

    Image tmp = Image.FromFile(@"F://ImageManager/images/1.jpg");

    Graphics g = Graphics.FromImage(tmp);

    try

    {

        Rectangle destRect = new Rectangle(0, 0, tmp.Width, tmp.Height);

        g.DrawImage(tmp, destRect, 0, 0, tmp.Width, tmp.Height, GraphicsUnit.Pixel, attr);

    }

    finally

    {

        g.Dispose();

    }

    this.pictureBox1.Image = tmp;

}

 

2.抓屏将生成的图片显示在pictureBox

private void button1_Click(object sender, EventArgs e)

 {

     Image myImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);

     Graphics g = Graphics.FromImage(myImage);

     g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height));

     IntPtr dc1 = g.GetHdc();

     g.ReleaseHdc(dc1);

     g.Dispose();

     this.pictureBox1.Image = myImage;

}

3.翻转

private void button3_Click(object sender, EventArgs e)

{

    Image tmp = this.pictureBox1.Image;

    tmp.RotateFlip(RotateFlipType.Rotate90FlipNone);

    this.pictureBox1.Image = tmp;

}

 

4.跟随鼠标在 pictureBox的图片上画矩形

private int intStartX = 0;

private int intStartY = 0;

private void pictureBox1_MouseDown(object sender, MouseEventArgs e)

{

    if (isMouseDraw)

    {

        isMouseDraw = false;

        //MessageBox.Show("禁用随鼠标画图");

    }

    else

    {

        isMouseDraw = true;

        //MessageBox.Show("启用随鼠标画图");

    }

    if (isMouseDraw)

    {

        intStartX = e.X;

        intStartY = e.Y;

    }

    else

    {

        intStartX = 0;

        intStartY = 0;

    }

}

private void pictureBox1_MouseMove(object sender, MouseEventArgs e)

{

    if (isMouseDraw)

    {

        try

        {

            Image tmp = Image.FromFile(@"F://ImageManager/images/1.jpg");

            Graphics g = Graphics.FromImage(tmp);

            Brush brush = new SolidBrush(Color.Red);

            Pen pen = new Pen(brush, 1);

            pen.DashStyle = DashStyle.Solid;

            g.DrawRectangle(pen, new Rectangle(intStartX > e.X ? e.X : intStartX, intStartY > e.Y ? e.Y : intStartY, Math.Abs(e.X - intStartX), Math.Abs(e.Y - intStartY)));

            g.Dispose();

            this.pictureBox1.Image = tmp;

        }

        catch (Exception ex)

        {

            ex.ToString();

        }

    }

}