Add single image files for the pictures the QR Scan Difficulty page links to

README.md

@@ -78,6 +78,13 @@ row["target"], row["extracted_voted"]      # PIL images, same sample
 src = load_dataset("devmandan/qr-dn1.0", "source_qr", split="train")
 ```
 
+## Single images
+
+`images/` holds single JPEG files of the test-split pictures that the QR Scan Difficulty page links to as examples,
+so a reader can open one exact picture and try it with a phone. Each is byte-identical to the image in this dataset's
+Parquet tables: `images/test/<sample_id>_<variant>.jpg` (for example `1516_extracted_voted.jpg`), and source codes
+as `images/source_qr/<name>.jpg`. The viewer and `load_dataset` read only `data/`, so they are unchanged.
+
 ## Citation
 
 ```bibtex