RESEARCH OF DIGITAL CAMERA DYNAMIC RANGE ON THE IMAGING PROCESSING BASIS
https://doi.org/10.21122/2220-9506-2017-8-3-271-278
Abstract
Digital images provide to determine photometric and colorimetric properties of objects subject to validation all elements of a measuring channel (digital camera, software, display) and solve the problem of their limited dynamic ranges. The aim of the study was to explore the dynamic range of a digital camera for use in photometric and colorimetric measurements.
The Laboratory of Photonics at the Institute of Microelectronics and Optoelectronics (Warsaw Technical University, Poland) conducted a comparative experiment to determine the threshold of sensitivity, linearity and range of application the digital camera. Color target sets with certified brightness and chromaticity were created at the terminals and recorded with a digital camera with different exposure times. The authors propose a method to extend the dynamic range of a digital camera for red, green and blue color channel of intensities by pairing the calibration dependencies, and determine the true brightness and color of a point on the object by calculation.
Calibration dependencies (triads) of digital camera for red, green and blue color channels intensities were constructed. These dependences allow determining lower and upper bounds of the dynamic range. Each triad has a form of the hysteresis loop. The experiment showed that the accuracy of this method is ± 3–5 %.
About the Authors
M Sutkowski
Warsaw University of Technology
Poland
Poland
Institute of Microelectronics and Optoelectronics
15/19 Nowowiejska Str., Warsaw 00-665
Ya. N. Saukova
Belarusian National Technical University
Belarus
Belarus
Address for correspondence: Saukova Ya. – Belarusian National Technical University, Nezavisimosty Ave., 65, Minsk 220013, Belarus e-mail: evgeniya-savkova@yandex.ru
References
1. Ward P. Working with digital cameras: lessons learned operator skills. Moscow, Mir Publ., 2001, 301 p. (in Russian).
2. Lynch R. The Usage of Adobe Photoshop 6. Special edition, Moscow, Publishing house «Williams», 2001, 880 p. (in Russian).
3. Reihard E., Ashikhmin M., Gooch B. and Shirley P. «Colour Transfer between Images». YIEEE Computer Graphics and Application, Appied perception, September/ October 2001, pp. 34–41.
4. Goden J. Colorimetric in the rendering performance. Moscow, Technosphere Publ., 2008, 328 p. (in Russian).
5. Rudakov P.I., Safonov V.I. Processing of signals and images. MATLAB 5х. Moscow, Technosphere Publ., 1998, 503 p. (in Russian).
6. Margulis D. Photoshop for professionals. Minsk, Popurry Publ., 1999, 304 p. (in Russian).
7. Zuikov I., Saukova Y. The Method of measuring the intensity of the light source. Patent G 01 J 1/00 By 10453. Application № а20051233/ Registered in the State register.
8. Süsstrunk S., Buckley R., Swen St. Standard RGB Color Spaces. Laboratory of audio-visual Communication (EPFL), Xerox Architecture Center, Apple Computer Lausanne, Switzerland; Webster, NY; Cupertino, CA. Available at: https://infoscience.epfl.ch/record/34089/files/SusstrunkBS99.pdf
9. Starovoitov V. V., Golub Yu. I. Digital image, from receipt to processing. Minsk, United Institute of Informatics problems, National Academy of Sciences of Belarus, 2014, 202 p. (in Russian).
10. Dvorkovich V.P., Dvorkovich A.V. Digital video information systems (Theory and Practice), Moscow, Technosphere Publ., 2012, 1008 p. (in Russian).
Review
For citations:
Sutkowski M., Saukova Ya.N. RESEARCH OF DIGITAL CAMERA DYNAMIC RANGE ON THE IMAGING PROCESSING BASIS. Devices and Methods of Measurements. 2017;8(3):271-278. https://doi.org/10.21122/2220-9506-2017-8-3-271-278
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