exif

Photoc is a new open-source command-line toolkit for photographers to review, organize, and prepare photos from the terminal — including metadata inspection, finding blurry shots and duplicates, renaming, contact sheets, and GPS scrubbing, with JPEG support and Sony ARW RAW metadata reading.

This article explores methods of hiding data by reordering existing unordered elements, such as Exif tags and CSS rules, using Lehmer codes to encode information without adding new data.

A detailed technical guide explaining Exif metadata structure, how it is stored in JPEG and other image formats, and practical considerations for developers working with image pixel data.

A discussion about parsing XML EXIF data from AVIF files, including a technical rant on the topic.