Technical gazette, Vol. 24 No. 3, 2017.
Preliminary communication
https://doi.org/10.17559/TV-20150410194409
Contrast enhancement of colour digital images
Miodrag Regodić
; Military Academy, Pavla Jurišića Šturma 33, 11000 Belgrade, Serbia
Ljubomir Gigović
orcid.org/0000-0002-8388-3624
; Military Academy, Pavla Jurišića Šturma 33, 11000 Belgrade, Serbia
Zoran Bajić
; Military Academy, Pavla Jurišića Šturma 33, 11000 Belgrade, Serbia
Slavko Vasiljević
; Civil Engineering and Geodesy, University of Banja Luka, Vojvode Stepe Stepanovića 77, 78000 Banja Luka, Republic of Srpska, Bosnia and Herzegovina
Abstract
The main parts of digital images processing are procedures that improve the images quality which does not improve information content, but ensures that the image is visually better and more suitable for display. That is achieved through improved contrast, noise removing, sharpening and colouring pictures. Contrast is the rate of frequency changes in illumination and recording the difference between light and dark elements of the image in the brightness level. Contrast is the difference between two adjacent surfaces’ brightness. Absolute value of the brightness of an object is of less importance than the relative brightness (contrast). Objects that have the same objective value of luminance may cause differences in the subjective sense of brightness depending on the contrast. This paper presents the improvement of the digital images quality in colour, which are the result of volcanic activity recording in the infrared region of the electromagnetic energy spectrum, with the application process to improve the contrast of images. High-quality digital images of the volcano were treated in high spatial resolution, which enabled the successful application of MATLAB and the results were very clear, precise and expressive images.
Keywords
contrast; digital image; improving the quality; MATLAB; Plosky Tolbachik; volcano
Hrčak ID:
183056
URI
Publication date:
15.6.2017.
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