Conversion to grayscale using emguCV in C#

c# emgucv grayscale
Amal picture Amal · Jun 1, 2010 · Viewed 36.4k times · Source

I am new to EmguCV. I want to convert an rgb image into gray scale. For the conversion I have used the code

Image<Gray,byte> grayImage = ColordImage.Convert<Gray, byte>();

Now when i compile this code in C# it gives no error,but when i run it then after a few seconds it gives me the exception at this line of code that this type of conversion is not supported by OpenCV. Now can any one help me solve this problem.

Regards Amal

Answer

Tom Wright picture Tom Wright · Jun 28, 2010

It may depend on the type of colour that ColordImage is.

For instance, this works:

Capture cap = new Capture(1);
Image <Bgr,Byte> ColordImage = cap.QueryFrame();
Image <Gray,Byte> grayImage = ColordImage.Convert<Gray, Byte>();
imageBox1.Image = grayImage;

If you could supply more of your code, it might become more obvious what's going on.

Related questions

The type initializer for 'Emgu.CV.CvInvoke' threw an exception

I'm getting this error The type initializer for 'Emgu.CV.CvInvoke' threw an exception. when I try to use Emgu CV. I've tried everything I can think of to fix this but it's still giving the same error, and when …

Read More
How do I equalize contrast & brightness of images using opencv?

I've got an image that I've scanned, but the white paper is not white on the screen. Is there a way to equalize the contract/brightness to make the background whiter? Update I've tried the suggested Image._EqualizeHist function from …

Read More
Calling the on-screen keyboard using a button in C#

I am creating a windows application using C#, where in a button on the GUI when clicked, should display the on-screen keyboard. Would appreciate if any help is granted. thanks. Also, since I am mostly using Emgu Cv library for …

Read More