Ahmet Oğuz Akyüz

Department of Computer Engineering
Scopus Author ID
Realistic Lighting for Interactive Applications Using Semi-Dynamic Light Maps
Öztürk, Bekir; Akyüz, Ahmet Oğuz (2020-12-01)
Light mapping is a technique that works by precomputing the lighting of a scene to speed up expensive lighting calculations at run-time. It is a commonly employed technique for computer games, in particular mobile games, d...
Just Noticeable Quantization Levels For High Dynamic Range Images
Sozer, Sevim Begum; Koz, Alper; Akyüz, Ahmet Oğuz; Zerman, Emin; Valenzise, Giuseppe; Dufaux, Frederic (2020-10-25)
Just noticeable quantization levels, which are conventionally used in picture coding, have been mainly developed for standard 8-bit images and low dynamic range (LDR) typical screens. The quantization levels however have n...
An Experimental Method to Determine Quantization Levels for High Luminance Patterns
Sözer, Sevim Begüm; Koz, Alper; Akyüz, Ahmet Oğuz; Zerman, Emin; Valenzise, Giuseppe; Dufaux, Frederic (2020-10-05)
The quantization levels, which forms an important basis for video coding, are mainly determined for 8-bit image representation and for low dynamic range (LDR) typical displays with a luminance level of 100-500 cd/ m 2 . Th...
Deep Joint Deinterlacing and Denoising for Single Shot Dual-ISO HDR Reconstruction
Cogalan, Ugur; Akyüz, Ahmet Oğuz (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-01)
HDR images have traditionally been obtained by merging multiple exposures each captured with a different exposure time. However, this approach entails longer capture times and necessitates deghosting if the captured scene ...
Automatic saturation correction for dynamic range management algorithms
Artusi, Alessandro; POULİ, Tania; BANTERLE, Francesco; Akyüz, Ahmet Oğuz (2018-04-01)
High dynamic range (HDR) images require tone reproduction to match the range of values to the capabilities of a display. For computational reasons and given the absence of fully calibrated imagery, rudimentary color reprod...
A Reliable and Reversible Image Privacy Protection Based on False Colors
ÇİFTÇİ, Serdar; Akyüz, Ahmet Oğuz; Ebrahimi, Touradj (2018-01-01)
Protection of visual privacy has become an indispensable component of video surveillance systems due to pervasive use of video cameras for surveillance purposes. In this paper, we propose two fully reversible privacy prote...
Privacy protection of tone-mapped HDR images using false colours
ÇİFTÇİ, Serdar; Akyüz, Ahmet Oğuz; PİNHEİRO, Antonio M. G.; Ebrahimi, Touradj (2017-12-01)
High dynamic range (HDR) imaging has been developed for improved visual representation by capturing a wide range of luminance values. Owing to its properties, HDR content might lead to a larger privacy intrusion, requiring...
Practical HDR A Simple and Effective Method for Merging High Dynamic Range Videos
Akcora, Ezgi; Banterle, Francesco; Corsini, Massimiliano; Akyüz, Ahmet Oğuz; Scopigno, Roberto (2016-12-12)
We introduce a novel algorithm for obtaining High Dynamic Range (HDR) videos from Standard Dynamic Range (SDR) videos with varying shutter speed or ISO per frame. This capturing technique represents today one of the most p...
A Proposed Methodology for Evaluating HDR False Color Maps
Akyüz, Ahmet Oğuz; KAYA, Osman (Association for Computing Machinery (ACM), 2016-08-01)
Color mapping, which involves assigning colors to the individual elements of an underlying data distribution, is a commonly used method for data visualization. Although color maps are used in many disciplines and for a var...
A Gamut-Mapping Framework for Color-Accurate Reproduction of HDR Images
SİKUDOVA, Elena; POULİ, Tania; ARTUSİ, Alessandro; Akyüz, Ahmet Oğuz; BANTERLE, Francesco; Mazlumoglu, Zeynep Miray; REİNHARD, Erik (2016-07-01)
An integrated gamut- and tone-management framework for color-accurate reproduction of high dynamic range images can prevent hue and luminance shifts while taking gamut boundaries into consideration. The proposed approach i...
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