Camera Calibration Curves for Luminance Data Acquisition using MATLA B

Sudheer Kumar, T S and Jacob, Nithya Merin and Kurian, Ciji Pearl and Shama, Kumara (2014) Camera Calibration Curves for Luminance Data Acquisition using MATLA B. International Journal of Engineering Research & Technology (IJERT), 3 (3). pp. 758-763. ISSN 2278-0181

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Abstract

Digital Camera is calibrated for absolute luminance measurements from high dynamic range image at a particular lighting condition using Macbeth colour checker chart. Luminance is extracted from the curves generated for different exposure values depending on lighting condition using MATLAB. Comparison of errors with existing methods show higher accuracy for the method developed. As automated systems have taken a lead role in energy conservation and management, this luminance based analysis is of great importance in daylightartificial light integrated buildings. The method proposed can be applied to zone - lighting control, glare & uniformity analysis in buildings and also for photometric testing and measurement. This paper also discusses the procedure for selecting a particular camera for HDRI applications using X-rite PULSE ColorElite software. The software is used for obtaining profiles of different cameras, and Nikon D5100 is selected from them for HDRI application of luminance measurement. In order to ensure that camera based photometric measurement will become the preferred option in this era, it is necessary to establish algorithms, methodology, software tools and to transfer this idea to design professionals and industry.

Item Type: Article
Uncontrolled Keywords: calibration; exposure Value (ev); high dynamic range (hdr); low dynamic range (ldr); luminance; profiling
Subjects: Engineering > MIT Manipal > Electrical and Electronics
Engineering > MIT Manipal > Electronics and Communication
Depositing User: MIT Library
Date Deposited: 14 Jan 2015 07:45
Last Modified: 14 Jan 2015 07:45
URI: http://eprints.manipal.edu/id/eprint/141586

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