---
title: "Reconstructed Slides: RAG Evaluation Is Broken! Here's Why (And How to Fix It) - Yuval Belfer and Niv Granot"
category: "slides"
video_id: "Ywl4LsvHKzU"
sourceLabels: ["Cropped public YouTube video frames", "Local OpenCV slide-region detection", "Local RapidOCR"]
---

# Reconstructed Slides: RAG Evaluation Is Broken! Here's Why (And How to Fix It) - Yuval Belfer and Niv Granot

## Source Video
[RAG Evaluation Is Broken! Here's Why (And How to Fix It) - Yuval Belfer and Niv Granot](https://www.youtube.com/watch?v=Ywl4LsvHKzU)

## Method
This deck is reconstructed from the existing video frame captures by detecting likely slide regions with OpenCV, cropping/upscaling those regions, deduplicating similar crops, and OCRing the cropped slide images locally. It is a cleaner companion to the full-stage frame deck.

## Reconstructed Slides
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-001.jpg]]

- Source frame: `slide-001.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `177.57`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-002.jpg]]

- Source frame: `slide-002.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `169.67`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-003.jpg]]

- Source frame: `slide-003.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `171.57`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-004.jpg]]

- Source frame: `slide-004.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `172.88`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-005.jpg]]

- Source frame: `slide-005.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `175.14`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-006.jpg]]

- Source frame: `slide-006.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `175.97`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-007.jpg]]

- Source frame: `slide-007.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `175.65`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-008.jpg]]

- Source frame: `slide-008.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `173.19`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-009.jpg]]

- Source frame: `slide-009.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `171.69`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-010.jpg]]

- Source frame: `slide-010.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `174.66`
![[assets/reconstructed-slides/Ywl4LsvHKzU/slide-011.jpg]]

- Source frame: `slide-011.jpg`
- Crop: `full` `[0, 0, 960, 540]` score `172.9`
## Dense Scene-Detected Slide Candidates
- [[youtube-Ywl4LsvHKzU-dense-slides]]