Update README.md

Author: gre

README.md

@@ -34,7 +34,7 @@ Returns a Promise of the image URI.
 
 - **`view`** is a reference to a React Native component.
 - **`options`** may include:
- - **`width`** / **`height`** *(number)*: the width and height of the image to capture.
+ - **`width`** / **`height`** *(number)*: the width and height of the final image (resized from the View bound. don't provide it if you want the original pixel size).
  - **`format`** *(string)*: either `png` or `jpg`/`jpeg` or `webm` (Android). Defaults to `png`.
  - **`quality`** *(number)*: the quality. 0.0 - 1.0 (default). (only available on lossy formats like jpeg)
  - **`result`** *(string)*, the method you want to use to save the snapshot, one of: