c# - 如何将 Image 转换为 Image？

Question

我正在尝试从另一张图片中减去一张图片，有点像这样:

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

但是报错

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>'

也许我需要将 firstImage 转换为 Image<Gray, float>类型。但我不知道该怎么做。

Answer 1

引自the documentation :

Color and Depth Conversion

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

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

所以，在你的情况下，你可以使用

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