how to save and decode gray-jpeg images?

[Nise-2-meet-U]

My training data are one channle gray images.

[phelps-matthew]

Yes, it would be great if there were a class similar to ffcv.fields.RGBImageField for grayscale images that allows ones to write them with the same jpeg compression capability.

[GuillaumeLeclerc]

Hi!

There is currently a PR with this functionality. You can try this branch and give feedback in #176 .