### Is there an existing issue for this? - [x] I have searched the existing issues and checked the recent builds/commits ### What would your feature do ? Feature would allow for automatically processing additional generations from previous prompts from a list of generated image png file paths. ### Proposed workflow 1. Load text file with full png file paths, one file path per line 2. For each file path, load its metadata in the png tab, and automatically parse and transfer metadata to txt2img 3. Override certain generation parameters through fields or sliders to be applied to the entire batch of prompts (e.g. random seed, batch size, number of batches) 4. Run the prompt for the specified batch size, number of batches, and seed 5. Repeat for next png file path in input text file until all are complete ### Additional information Often times I explore many different prompts in quick succession, and then I want to go back later to generate a larger number of images from past prompts, for greater variety, or to achieve greater quality from the set. This feature would help with that! Having to do this manually takes a lot of manual intervention, and switching prompts and pressing 'generate' cannot be done while sleeping or away from the computer. I already tried developing a Python script to carry out this behavior, but I ran into issues with parsing the metadata tuple from each png file into the fields needed to run txt2img. Internally the webui clearly has this functionality, as seen by the features of the PNG tab, but I could not find publicly available modules to mimic this behavior. Ideally, the feature would work within the webui, such that loaded png files and previews of generated images are still displayed, and such that all generated images would be saved as normal according to the webui's user settings. This feature request differs from the prompt matrix script or using the '|' character because I don't want to do multiple combinations of small changes within the same prompt, I want to load up completely distinct prompts for every run. And ideally, the input file may have hundreds of different distinct prompts, in which case, I would want to leave the full batch running for days or weeks at a time until everything is complete.