Revise README for clarity on dataset details

Updated the overview and summary sections to clarify details about the dataset, including the optical potential and video format.

Author: cmanzo

README.md

@@ -2,19 +2,15 @@
 
 ## Overview
 
-This DeepTrackAI repository contains two short videos of an optically trapped microscopic particle undergoing Brownian motion. The dataset was published in 
-[Helgadottir et al., Optica, 2019](https://doi.org/10.1364/OPTICA.6.000506). 
-One video is acquired with **low noise** (`low_noise.avi`), and the other with **high noise** (`high_noise.avi`). In both cases, the particle jiggles around the center of the frame due to thermal motion. 
+This DeepTrackAI repository contains two short videos of an optically trapped microscopic particle undergoing Brownian motion in the optical potential. The dataset was published in [Helgadottir et al., Optica, 2019](https://doi.org/10.1364/OPTICA.6.000506). 
 
----
-
-## Summary
+One video is acquired with **low noise** (`low_noise.avi`), and the other with **high noise** (`high_noise.avi`). In both cases, the particle jiggles around the center of the frame due to thermal motion.
 
+### Summary
 - **Number of videos**: 2 (`low_noise.avi`, `high_noise.avi`) 
 - **Frames per video**: 100 
-- **Frame size**: 120×120 pixels 
-- **Color**: RGB 
-- **Format**: AVI 
+- **Image size**: 120 × 120 pixels 
+- **Video format**: 8-bit RGB AVI 
 
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