public DrawToHdc()
{
CvRect roi = new CvRect(320, 260, 100, 100); // region of roosevelt's face
using (var src = new IplImage(FilePath.Image.Yalta, LoadMode.Color))
using (var dst = new IplImage(roi.Size, BitDepth.U8, 3))
{
src.ROI = roi;
using (Bitmap bitmap = new Bitmap(roi.Width, roi.Height, PixelFormat.Format32bppArgb))
using (Graphics g = Graphics.FromImage(bitmap))
{
//BitmapConverter.DrawToGraphics(src, g, new CvRect(new CvPoint(0, 0), roi.Size));
IntPtr hdc = g.GetHdc();
BitmapConverter.DrawToHdc(src, hdc, new CvRect(new CvPoint(0, 0), roi.Size));
g.ReleaseHdc(hdc);
g.DrawString("Roosevelt", new Font(FontFamily.GenericSerif, 12), Brushes.Red, 20, 0);
g.DrawEllipse(new Pen(Color.Red, 4), new Rectangle(20, 20, roi.Width / 2, roi.Height / 2));
dst.CopyFrom(bitmap);
}
src.ResetROI();
using (new CvWindow("src", src))
using (new CvWindow("dst", dst))
{
Cv.WaitKey();
}
}
}
/// <summary>
/// Bitmap -> IplImage
/// </summary>
private void TestBitmap()
{
using (Bitmap bitmap = new Bitmap(Const.ImageFruits))
{
IplImage ipl = new IplImage(bitmap.Width, bitmap.Height, BitDepth.U8, 3);
//ipl = bitmap.ToIplImage();
ipl.CopyFrom(bitmap);
using (new CvWindow("from Bitmap to IplImage", ipl))
{
Cv.WaitKey();
}
}
}
public IplImage DrawToHdc(IplImage src)
{
hdcgrahics = new IplImage(src.Size, BitDepth.U8, 3);
Bitmap bitmap = new Bitmap(src.Width, src.Height, PixelFormat.Format32bppRgb);
Graphics grp = Graphics.FromImage(bitmap);
IntPtr hdc = grp.GetHdc();
BitmapConverter.DrawToHdc(src, hdc, new CvRect(new CvPoint(0, 150), new CvSize(src.Width, src.Height - 150)));
grp.ReleaseHdc(hdc);
grp.DrawString("안녕하세요.", new Font("맑은 고딕", 72), Brushes.Red, 5, 5);
hdcgrahics.CopyFrom(bitmap);
return(hdcgrahics);
}
/// <summary>
/// 顔の位置を取得
/// </summary>
/// <param name="headPosition">スケルトンの頭の位置座標</param>
/// <returns>顔座標</returns>
private Rect CheckFacePosition(ColorImagePoint headPosition)
{
//切り取る領域の範囲
int snipWidth = 200;
int snipHeight = 200;
// 返却用Rect (初期値はスケルトンの頭の座標とimage2画像の幅)
Rect reRect = new Rect(headPosition.X, headPosition.Y,
image2.Width, image2.Height);
storage.Clear();
openCVGrayImage.ResetROI(); // たまにROIがセットされた状態で呼ばれるためROIをリセット
openCVImage.CopyFrom(outputImage); // WriteableBitmap -> IplImage
Cv.CvtColor(openCVImage, openCVGrayImage, ColorConversion.BgrToGray); // 画像をグレイスケール化
Cv.EqualizeHist(openCVGrayImage, openCVGrayImage); // 画像の平滑化
// 顔認識
try {
// 画像の切り取り
var snipImage = SnipFaceImage(openCVGrayImage, headPosition, snipWidth, snipHeight);
if (snipImage != null)
{
CvSeq <CvAvgComp> faces = Cv.HaarDetectObjects(snipImage, cascade, storage);
// 顔を検出した場合
if (faces.Total > 0)
{
reRect.X = faces[0].Value.Rect.X + (headPosition.X - snipWidth / 2);
reRect.Y = faces[0].Value.Rect.Y + (headPosition.Y - snipHeight / 2);
reRect.Width = faces[0].Value.Rect.Width;
reRect.Height = faces[0].Value.Rect.Height;
}
}
}
catch (Exception) { }
return(reRect);
}
