PNG extra data storage limitation
You may wonder whether there are any limitations on text data size. There is no specific limit on the amount of metadata that can be written to a PNG file. However, there are practical constraints based on the PNG file structure and the limitations of the software or libraries used to read and write the metadata.
A PNG file, as we discussed in the first section, is stored in chunks. Each chunk has a maximum size of 2 31 − 1 bytes (approximately 2 GB). While it is theoretically possible to include multiple metadata chunks within a single PNG file, storing excessive or overly large data within these chunks can lead to errors or slow loading times when attempting to open the image using other software.
In practice, metadata in PNG files is usually small, containing information such as copyright, author, description, or the software used to create the image. In our case, it is the Stable Diffusion parameters that are used to generate...
