The LaTeX-OCR plugin integrates the LaTeX-OCR tool into Obsidian, allowing users to convert images of LaTeX-rendered equations back into raw LaTeX code. It adds a convenient button in the ribbon and a command palette option for quick access, as well as an optional status bar indicator to monitor the process. This plugin streamlines the workflow for users working with mathematical or technical content, making it easy to edit or reuse equations in Markdown notes.