How can I use a pre-trained neural network with grayscale images?

Question

I have a dataset containing grayscale images and I want to train a state-of-the-art CNN on them. I\'d very much like to fine-tune a pre-trained model (like the ones here).

Answer 1

If you're already using scikit-image, you can get the desired result by using gray2RGB.

from skimage.color import gray2rgb
rgb_img = gray2rgb(gray_img)