Hi all!

I have recently put together a course on diffusion image generation that includes videos, a minimal PyTorch framework, and a set of notebooks (all results can be run in Google colab!)

https://github.com/mikonvergence/DiffusionFastForward

I am hoping it can help those interested in learning to train diffusion models from scratch in a TLDR mode. What I think is quite different here from other tutorials is that it includes not only low-resolution generation (64x64) but also notebooks for training in high-resolution (256x256) from scratch. And also an example of an image-to-image translation that I think some people will find entertaining!

I'm looking forward to hearing some feedback or comments, and I hope you enjoy the course if you decide to check it out!

PS. you can also go directly to the videos on YT https://youtube.com/playlist?list=PL5RHjmn-MVHDMcqx-SI53mB7sFOqPK6gN

Comments

[deleted] t1_jam354o wrote on March 2, 2023 at 12:14 PM

#2,143,920

Excellent

blabboy t1_jam5ppi wrote on March 2, 2023 at 12:40 PM

#2,143,998

Looks great! Is the code under a specific licence?

mikonvergence OP t1_jam6eal wrote on March 2, 2023 at 12:47 PM

#2,144,018

Replying to blabboy (#2,143,998)

Thanks for pointing this out! I'll add some permissive license to the repository today to allow free use!

mikonvergence OP t1_jam6qmo wrote on March 2, 2023 at 12:50 PM

#2,144,036

Replying to mikonvergence (#2,144,018)

MIT license has now been added to the project!

boglepy t1_jan2f9k wrote on March 2, 2023 at 4:41 PM

#2,145,471

Following!

SnooMarzipans1345 t1_jan3fnu wrote on March 2, 2023 at 4:48 PM

#2,145,529

I'm new to this-- "whatever" topic
please explain to me this topic of op as if I am a child in TL:DR format.

Ps I did read, but what encryption is this "hero"!?

mikonvergence OP t1_jan5fnj wrote on March 2, 2023 at 5:00 PM

#2,145,617

Replying to SnooMarzipans1345 (#2,145,529)

Hi! Sure, here it goes:

It's a course about making AI models that can create images. These models can that by learning from a dataset of example images. "Diffusion" is a new type of AI model that works very well for this task.

The course will work best for those familiar with training deep neural networks for generative tasks, so I would advise catching up on topics like VAEs or GANs. However, the video course material is quite short (about 1,5 hrs) so you can just play it and see if it works for you or not!

lost_fodder6947 t1_jan7zat wrote on March 2, 2023 at 5:17 PM

#2,145,754

Nice... 😄

varukimm t1_jannjxw wrote on March 2, 2023 at 7:04 PM

#2,146,419

Save

plocco-tocco t1_janz2xc wrote on March 2, 2023 at 8:21 PM

#2,146,904

Great work! Would the image translation work for (binary) image segmentation?

mikonvergence OP t1_jao1h1c wrote on March 2, 2023 at 8:36 PM

#2,147,020

Replying to plocco-tocco (#2,146,904)

Thank you! Yes, in principle, you can generate segmentation maps using the code from the course by treating the segmentation map as the output. I'm not sure how that would compare to a non-diffusion segmentation with the same backbone network but definitely it would be interesting to explore that!

Please remember that the diffusion process generally expects data bound in [-1,+1] range, so in the framework, the images are shifted from the assumed [0,1] limits to that range automatically (via input_T and output_T). So if you go beyond the binary and use more classes within a single channel, make sure the output ground truth values are still between [0,1] (alternatively, you can split each class confidence into a separate channel but it should still be bound).

But yeah, for binary, it should work with no special adjustment!

plocco-tocco t1_jao43p9 wrote on March 2, 2023 at 8:53 PM

#2,147,110

Replying to mikonvergence (#2,147,020)

Thanks for the input. I have seen some papers claiming SOTA in image segmentation using diffusion so I am also curious to see how they perform.

I have another question, if you don't mind. How difficult would it be to extend the code for image-to-image translation so that it works on 3D data (64x64x64 for example)?

mikonvergence OP t1_jao5zyg wrote on March 2, 2023 at 9:04 PM

#2,147,198

Replying to plocco-tocco (#2,147,110)

There could be a few simple solutions to extending this to 64x64x64 and each would have certain pros and cons. The two key decisions to make are in regards to the data format (perhaps there is a way to compress/reformat data so it's more digestible than direct 64x64x64) and in regards to the type of the underlying architecture (most importantly, do we use a 2D or 3D CNN, or a differnt type of topology altogether).

A trivial approach would be to use a 2D architecture with 64 channels instead of the usual 3, which could be very easily implemented with the existing framework. I predict that would be quite hard to train, however, though you might still try.

This is an area of active research (beyond DreamFusion and other popular papers I'm not very familiar with it), so exploring different solutions to this is still required, and if you discover something that works reasonably well then that will be really exciting!