How to convert Image <Gray, Byte> to Image <Gray, float>?

Question

I'm trying to put one image from another, something like this:

Image<Gray, float> result, secondImage; Image<Gray, byte> firstImage; result = firstImage - secondImage; 

But it gives an error

 Operator '-' cannot be applied to operands of type 'Emgu.CV.Image<Emgu.CV.Structure.Gray,byte>' and 'Emgu.CV.Image<Emgu.CV.Structure.Gray,float>' 

Maybe I need to convert firstImage to type Image<Gray, float> . But I do not know how to do this.

Answer 1

Quote documentation :

Color and depth conversion

Converting an image between different colors and depths is simple. For example, if you have Image img1 and you want to convert it to a Single grayscale image, all you have to do is

 Image<Gray, Single> img2 = img1.Convert<Gray, Single>(); 

So in your case you can use

 result = firstImage.Convert<Gray, float>() - secondImage;