//try to remove the red eyes from a selection of a picture
//code logic from: http://stackoverflow.com/questions/133675/red-eye-reduction-algorithm
private void redEyeReductionToolStripMenuItem_Click(object sender, EventArgs e)
{
BitmapHelper ctImage = new BitmapHelper(ref img);
Pixel pixel;
float redIntensity;
//first make sure that the user selected a rectangle
if (re.Height != 0 && re.Width != 0)
{
for (int i = re.Y; i < re.Bottom; i++)
{
for (int j = re.X; j < re.Right; j++)
{
pixel = ctImage.getPixel(i, j);
//Value of red divided by average of blue and green:
redIntensity = ((float)pixel.Red / ((pixel.Green + pixel.Blue) / 2));
if (redIntensity > 2.0f)
{
// reduce red to the average of blue and green
ctImage.setPixel(i, j, new Pixel((pixel.Green + pixel.Blue) / 2, pixel.Green, pixel.Blue));
}
}
}
img = ctImage.getBitmap();
origImg.Dispose();
origImg = new Bitmap(img);
pictureBox.Image = img;
}
else
MessageBox.Show("You must first make a selection to use this feature.", "Warning");
}
//convert the image to grayscale
private void convertToGrayscaleToolStripMenuItem_Click(object sender, EventArgs e)
{
BitmapHelper ctImage = new BitmapHelper(ref img);
Pixel pixel, tmp=new Pixel(0, 0, 0 );
for (int i = 0; i < ctImage.getHeight(); i++)
{
for (int j = 0; j < ctImage.getWidth(); j++)
{
pixel = ctImage.getPixel(i, j);
tmp.Blue=tmp.Green = tmp.Red = Convert.ToInt32(pixel.Red * 0.299 + pixel.Green * 0.587 + pixel.Blue * 0.114);
ctImage.setPixel(i, j, tmp);
}
}
img = ctImage.getBitmap();
origImg.Dispose();
origImg = new Bitmap(img);
pictureBox.Image = img;
}
//make the image negative ( 255- R/G/B for each pixel )
private void negativeToolStripMenuItem_Click(object sender, EventArgs e)
{
BitmapHelper ctImage = new BitmapHelper(ref img);
Pixel pixel;
for (int i = 0; i < ctImage.getHeight(); i++)
{
for (int j = 0; j < ctImage.getWidth(); j++)
{
pixel = ctImage.getPixel(i, j);
pixel.Red = 255 - pixel.Red;
pixel.Green = 255 - pixel.Green;
pixel.Blue = 255 - pixel.Blue;
ctImage.setPixel(i, j, pixel);
}
}
img = ctImage.getBitmap();
origImg.Dispose();
origImg = new Bitmap(img);
pictureBox.Image = img;
}