SNR-Bench comprises 80 high-quality image-editing cases. Approximately 50% are sampled from PIE-Bench to ensure continuity with standard benchmarks, and the remaining 50% are collected from the web to introduce richer textures and more complex real-world scenes. We cover four editing operations: adjust, change, remove, and add. To minimize ambiguity and improve instruction consistency, all editing instructions for the non--PIE-Bench subset are manually written, refined, and verified through human annotation.
