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();

}

}

}