document 1:1 crops + inputs

README.md

@@ -179,10 +179,16 @@ development log — including dead ends and raw numbers — is in
 
 ## Examples
 
-`examples/*_compare.png` feed real images in **as-is** (not downscaled) and
-show the 4x result: **input** | **bicubic x4** | **NERVE 4x release** |
-**NERVE 4x OTF GAN**. The bicubic column is the baseline; the OTF GAN column
-is the released showcase model.
+Real images are fed in **as-is** (not downscaled) and upscaled 4x. For each
+image there are two comparisons:
+
+- `examples/*_compare.png` — whole image: **input** | **bicubic x4** |
+  **NERVE 4x release** | **NERVE 4x OTF GAN**.
+- `examples/*_1to1.png` — a **1:1 native-pixel center crop**, which is where
+  the quality difference is actually visible.
+
+The bicubic column is the baseline; the OTF GAN column is the released showcase
+model. The source inputs are in `examples/inputs/`.
 
 - `examples/realphoto_compare.png` (street scene)
 - `examples/ani_compare.png` (anime)