lin1318/object_detection

1---2dataset_name: object_detection3language: en4license: mit5---6# Image-to-Video Semantic Retrieval via Object Detection – Dataset Schema7 8This repository contains detection and retrieval results for a Toyota RAV4 2026 review video.9 10Frames were sampled every 5 seconds from the source video.11 12---13 14# 1. Video Detections15 16File: `video_detections.parquet`17 18Each row corresponds to a single object detection in a sampled video frame.19 20## Schema21 22| Column | Type | Description |23|--------|------|-------------|24| video_id | string | YouTube video identifier |25| frame_index | int | Index of the sampled frame (starting from 1) |26| timestamp_sec | int | Time position in seconds |27| class_label | string | Detected exterior component label |28| bounding_box | list[float] | Bounding box in pixel coordinates: [x_min, y_min, x_max, y_max] |29| confidence_score | float | YOLO detection confidence score |30 31---32 33# 2. Retrieval Results34 35File: `query_retrieval_results.parquet`36 37Each row corresponds to one retrieved video segment for a given query image and component.38 39Retrieval is performed by matching detected component labels between query image detections and the video detection index. Contiguous timestamps are merged into segments.40 41## Schema42 43| Column | Type | Description |44|--------|------|-------------|45| query_index | int | Index of the query image |46| query_timestamp_sec | int | Timestamp of the query image in seconds |47| video_id | string | YouTube video identifier |48| class_label | string | Component label used for matching |49| query_class_conf | float | Detection confidence of the component in the query image |50| start_timestamp | int | Start time (seconds) of the retrieved segment |51| end_timestamp | int | End time (seconds) of the retrieved segment |52| number_of_supporting_detections | int | Number of consecutive frames supporting this segment |53| verify_url | string | YouTube embed URL for manual verification |54 55---56 57## Verification58 59Retrieved segments can be verified using:60 61https://www.youtube.com/embed/{video_id}?start={start_timestamp}&end={end_timestamp}