Colorimetric Calibration of a Digital Camera

TL;DR

This paper presents a new physico-chemical calibration method for digital cameras using spectral measurements of calibration films to accurately construct calibration curves for each pixel, improving image analysis.

Contribution

A novel calibration approach leveraging spectral measurements and calibration films for precise pixel-wise camera calibration.

Findings

Spectral characteristics of corrected images are suitable for further analysis.

Calibration method improves accuracy of camera pixel response.

Demonstrates the method's effectiveness for image processing tasks.

Abstract

In this paper, we introduce a novel - physico-chemical - approach for calibration of a digital camera chip. This approach utilizes results of measurement of incident light spectra of calibration films of different levels of gray for construction of calibration curve (number of incident photons vs. image pixel intensity) for each camera pixel. We show spectral characteristics of such corrected digital raw image files (a primary camera signal) and demonstrate their suitability for next image processing and analysis.