Alpha Blending in Emgu CV

Question

Hi I am learning Emgu CV. I would like to perform alpha blend(addWeighted). I have the following codes

Image<Bgr, Byte> image = new Image<Bgr, Byte>(filename);
Image<Gray, Byte> grayImage = image.Convert<Gray, Byte>();
Image<Bgr, Byte> blendImage;

How to alpha blend these two images? (Bgr and Gray)

[This question](http://stackoverflow.com/questions/11958473/opencv-emgu-cv-compositing-images-with-alpha) may help. — But I'm Not A Wrapper Class, Aug 12 '14 at 15:36

score 0 · Answer 1 · answered Apr 11 '13 at 14:39

Try converting the grayscale image back to color and then blend them.

Image<Bgr, Byte> grayBGRImage = grayImage.Convert<Bgr, Byte>();
double alpha = 0.5; // Or however you would like to blend them
double beta = 1 - alpha;
double gamma = 0;
Image<Bgr, Byte> blendImage = image.AddWeighted(grayBGRImage, alpha, beta, gamma);

Alpha Blending in Emgu CV

1 Answers1