By submitting this request, you agree to use the dataset only for non-commercial academic research, not to redistribute the files, and to follow the applicable Google Earth/Google Maps terms for the satellite reference image.

Changping Night Demo

This repository contains a small desensitized representative subset of the self-built Changping Night dataset. It is released to improve the reproducibility of the experimental protocol and to let readers inspect the data format, dual-exposure pairing, reference-position representation, and evaluation metadata.

The full raw dataset is not publicly released due to privacy and geographic-security concerns.

Dataset Contents

The demo subset contains 10 paired UAV samples. Each sample folder contains:

high.JPG: high-exposure UAV image
low.JPG: low-exposure UAV image

The repository root contains:

sat.png: satellite reference image exported from Google Earth Pro
metadata_public.csv: desensitized metadata for all UAV image pairs
satellite_metadata_public.csv: satellite-image size, approximate ground coverage, and local coordinate-system metadata

Directory layout:

.
|-- sat.png
|-- metadata_public.csv
|-- satellite_metadata_public.csv
|-- 1/
|   |-- high.JPG
|   `-- low.JPG
|-- 2/
|   |-- high.JPG
|   `-- low.JPG
...
`-- 10/
    |-- high.JPG
    `-- low.JPG

Metadata

metadata_public.csv provides one row for each high-/low-exposure UAV image pair. The released metadata does not include raw GPS coordinates, capture time, camera serial numbers, DNG private metadata, or absolute local file paths.

Main fields:

sample_id: sample index
high_image, low_image: relative paths to the public JPG images
sat_x_px, sat_y_px: UAV reference position in the satellite image, in pixels
local_x_m, local_y_m: local metric coordinates in the satellite image frame
altitude_m: UAV altitude record
gimbal_pitch, gimbal_roll, gimbal_yaw: gimbal attitude angles in degrees
flight_pitch, flight_roll, flight_yaw: UAV body attitude angles in degrees
high_exposure_s, low_exposure_s: exposure time of the high-/low-exposure images
high_iso, low_iso: ISO values
high_fnumber, low_fnumber: f-number values

satellite_metadata_public.csv describes the satellite reference image. The coordinate system uses the top-left image corner as the origin, with the x-axis pointing rightward and the y-axis pointing downward.

Reference Position Generation

Each dual-exposure sample was collected while the UAV was hovering. The high- and low-exposure images were captured consecutively. The reference position of each image pair is generated from the corresponding UAV flight record and then converted into a pixel location in the satellite reference image.

For this public demo, only the satellite-image pixel coordinates and local metric coordinates are released. Raw geographic coordinates are omitted for privacy and geographic-security reasons.

Privacy and Desensitization

The public UAV images are provided as JPG files with EXIF metadata removed. The released CSV files do not contain:

raw latitude or longitude
capture date or time
camera serial numbers
GPS EXIF fields
DNG private metadata
absolute local filesystem paths

The original DNG files and full internal metadata are not included in this public release.

Third-Party Satellite Image Notice

The satellite reference image sat.png was exported from Google Earth Pro and is included only as a visual and experimental reference for non-commercial academic reproducibility. The satellite imagery and its attribution remain subject to Google Earth/Google Maps terms and the rights of Google and its imagery providers.

The license selected for this repository does not grant ownership or relicensing rights over the Google Earth satellite imagery. Users should follow the applicable Google Earth/Google Maps terms when using or redistributing sat.png.

Intended Use

This demo subset is intended for:

inspecting the Changping Night data format
reproducing the dual-exposure pairing protocol at a small scale
checking the metadata used for UAV-to-satellite reference-position evaluation
supporting peer-review verification of the experimental setup

It is not intended for training a full-scale model or for commercial use.

Citation

If you use this demo subset, please cite the associated paper. A formal citation will be added after publication.

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