// Transform quadrilateral
private void quadrilateralTransformationMenuItem_Click( object sender, EventArgs e )
{
// get corners of the quadrilateral
QuadrilateralFinder qf = new QuadrilateralFinder( );
List<IntPoint> corners = qf.ProcessImage( image );
// create filter
QuadrilateralTransformation filter =
new QuadrilateralTransformation( corners );
ApplyFilter( filter );
}
// Find quadrilateral
private void quadrilateralFinderMenuItem_Click( object sender, EventArgs e )
{
// get corners of the quadrilateral
QuadrilateralFinder qf = new QuadrilateralFinder( );
List<IntPoint> corners = qf.ProcessImage( image );
Bitmap imageToPaint = image;
if ( ( host.CreateNewDocumentOnChange ) || ( host.RememberOnChange ) )
{
// create copy image, so the original is kept
imageToPaint = AForge.Imaging.Image.Clone( image );
}
// lock image to draw on it with AForge.NET's methods
// (or draw directly on image without locking if it is unmanaged image)
BitmapData data = imageToPaint.LockBits( new Rectangle( 0, 0, image.Width, image.Height ),
ImageLockMode.ReadWrite, image.PixelFormat );
Drawing.Polygon( data, corners, Color.Red );
for ( int i = 0; i < corners.Count; i++ )
{
Drawing.FillRectangle( data,
new Rectangle( corners[i].X - 2, corners[i].Y - 2, 5, 5 ),
Color.FromArgb( i * 32 + 127 + 32, i * 64, i * 64 ) );
}
imageToPaint.UnlockBits( data );
if ( host.CreateNewDocumentOnChange )
{
// open new image in new document
host.NewDocument( imageToPaint );
}
else
{
if ( host.RememberOnChange )
{
// backup current image
if ( backup != null )
backup.Dispose( );
backup = image;
image = imageToPaint;
}
// update
UpdateNewImage( );
}
}
