# Gray-Pixel

**Repository Path**: fengfeng043/Gray-Pixel

## Basic Information

- **Project Name**: Gray-Pixel
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: GPL-3.0
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-02-18
- **Last Updated**: 2025-02-18

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#  MATLAB codes for Gray Pixel detection
**--GreyPixel_CVPR2015.zip--**  
Source codes of the Gray pixel detection method reported in  
"KF Yang, SB Gao, YJ Li*. Efficient Illuminant Estimation for Color Constancy Using Grey Pixels. CVPR, 2015".

We systematically developed Gray-pixel methods for illuminant estimation. This included proposing the gray-pixel hypothesis, validating it, and developing algorithms for color constancy.

**--RGP_JOSAA2024.zip--**  
Source codes of the Robust Gray pixel detection reported in
C Cheng, KF Yang*, XM Wan, LLH Chen, YJ Li. Nighttime Color Constancy Using Robust Gray Pixels. JOSA A, 2024.
  
We develop a robust gray pixel (RGP) detection method by carefully designing the computation of illuminant-invariant measures from a given color-biased nighttime image.
In addition, to evaluate the proposed method, a new dataset that contains 513 nighttime images and corresponding ground-truth illuminants was collected [[NCC dataset]](https://www.kaggle.com/datasets/yangkaifu/nighttime-color-constancy).