转换 'Emgu.CV.Image<emgu.cv.structure.bgr,byte> ' 到 'System.Drawing.Image'</emgu.cv.structure.bgr,byte>

Question

I'm making a face recognition in C#. How can I solve this error?

Error 4 Cannot implicitly convert type 'Emgu.CV.Image' to 'System.Drawing.Image'

for this code:

cameraBox1.Image = Frame;
names = "" ;
User.Clear();

Answer 1

System.Windows.Forms.PictureBox like cameraBox1 doesn't accept Emgu.CV.Image directly. You must convert it to System.Drawing.Image like this cameraBox1.Image = Frame.ToBitmap();

Answer 2

There are two ways:

a) Image class Bitmap Property :

cameraBox1.Image = Frame.Bitmap;

Wraps Bitmap around Image pixel data. No copy involved.

b) Image class ToBitmap() method :

cameraBox1.Image = Frame.ToBitmap();

Copies pixel data from Image into new Bitmap.

Which way you choose depends on your needs. a) is faster but creates shared memory which is more difficult to deal with.