public Image2Stream()
{
// Stream -> IplImage
using (FileStream stream = new FileStream(FilePath.Image.Lenna, FileMode.Open))
using (IplImage img = IplImage.FromStream(stream, LoadMode.Color))
{
CvWindow.ShowImages(img);
// IplImage -> Stream
using (MemoryStream ms = new MemoryStream())
{
img.ToStream(ms, ".tiff");
ms.ToString();
}
}
// Stream -> CvMat
using (FileStream stream = new FileStream(FilePath.Image.Lenna, FileMode.Open))
using (CvMat mat = CvMat.FromStream(stream, LoadMode.Color))
{
mat.ToString();
// CvMat -> Stream
using (MemoryStream ms = new MemoryStream())
{
mat.ToStream(ms, ".bmp");
ms.ToString();
}
}
}
public ActionResult Canny(HttpPostedFileBase imageData)
{
// 入力画像からIplImageを読み込み
using (var image = IplImage.FromStream(imageData.InputStream, LoadMode.Color))
{
// グレースケール化・Cannyエッジ検出
using (var grayImage = new IplImage(image.Size, BitDepth.U8, 1))
using (var cannyImage = new IplImage(image.Size, BitDepth.U8, 1))
{
Cv.CvtColor(image, grayImage, ColorConversion.BgrToGray);
Cv.Canny(grayImage, cannyImage, 60, 180);
// Canny画像をPNGエンコードでバイト配列に変換し、さらにBase64エンコードする
byte[] cannyBytes = cannyImage.ToBytes(".png");
string base64 = Convert.ToBase64String(cannyBytes);
// ビュー変数に設定
ViewBag.Base64Image = base64;
}
}
return(View());
}