Question about custom dataset

Thank you for your work.

I have my own 32by32 image(.png) dataset that I'm trying to use with

I would like to make this image only better in quality, but I'm not sure how to do it

I would be grateful if you could answer me.

Bottom line is that I want to enhance the images in my dataset with ddim.

Also, I would like to use a pre-trained model, not train a new model.

Thanks.