Fatih Kamışlı

Department of Electrical and Electronics Engineering
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End-to-end learned image compression with conditional latent space modeling for entropy coding
Yesilyurt, Aziz Berkay; Kamışlı, Fatih (2021-01-24)
© 2021 European Signal Processing Conference, EUSIPCO. All rights reserved.The use of neural networks in image compression enables transforms and probability models for entropy coding which can process images based on much...
Single Image Noise Level Estimation Using Dark Channel Prior
Yeşilyurt, Aziz Berkay; Erol, Aybüke; Kamışlı, Fatih; Alatan, Abdullah Aydın (2019-09-22)
Noise level is required as an input parameter in various image processing applications. In this work, we use the dark channel prior (DCP) to estimate the noise level of an image degraded by additive white Gaussian noise. W...
Lossless Image and Intra-Frame Compression With Integer-to-Integer DST
Kamışlı, Fatih (2019-02-01)
Video coding standards are primarily designed for efficient lossy compression, but it is also desirable to support efficient lossless compression within video coding standards using small modifications to the lossy coding ...
Coding Gain Optimized 8-Point DST with Fast Algorithm for Intra-frames in Video Coding
Cilasun, M. Husrev; Kamışlı, Fatih (2018-08-07)
In modern video codecs, such as HEVC and VP9, intra-frame blocks are decorrelated using DCT or DST. The optimal separable transform for intra prediction residual blocks has been determined to be a hybrid transform composed...
Fast DST optimizations for intra-frame coding
Cılasun, Muhammed Hüsrev; Kamışlı, Fatih (2018-07-09)
In modern video codecs, such as HEVC and VP9, intra-frame blocks are decorrelated utilizing DCT or DST. Although odd type-III DST (ODST-III) converges to KLT, which is the theoretical limit in terms of coding gain in the p...
Statistical Analysis and Directional Coding of Layer-based HDR Image Coding Residue
Feyiz, Kutan; Kamışlı, Fatih; Zerman, Emin; Valenzise, Giuseppe; Koz, Alper; Dufaux, Frederic (2017-10-18)
Existing methods for layer-based backward compatible high dynamic range (HDR) image and video coding mostly focus on the rate-distortion optimization of base layer while neglecting the encoding of the residue signal in the...
Statistical Analysis of Residue Signal for Backward Compatible HDR Image Coding
Kamışlı, Fatih; Feyiz, Kutan; Koz, Alper; Zerman, Emin; Valenzise, Giuseppe; Dufaux, Frederic (2017-07-29)
Backward compatibility to the existing 8-bit displays for HDR image and video compression is an essential requirement for the wide acceptance of HDR technology by the users. While these previous methods mainly focus on the...
An efficient HW&SW design of H.264 video compression, storage and playback on FPGA devices for hand-held thermal imaging systems
Gunay, Omer; Ozsarac, Ismail; Kamışlı, Fatih (2017-04-11)
Video recording is an essential property of new generation military imaging systems. Playback of the stored video on the same device is also desirable as it provides several operational benefits to end users. Two very impo...
A low-complexity image compression approach with single spatial prediction mode and transform
Kamışlı, Fatih (2016-11-01)
The well-known low-complexity JPEG and the newer JPEG-XR systems are based on block-based transform and simple transform-domain coefficient prediction algorithms. Higher complexity image compression algorithms, obtainable ...
Kamışlı, Fatih (2016-09-23)
Many approaches have been proposed to support lossless coding within video coding standards that are primarily designed for lossy coding. The simplest approach is to just skip transform and quantization and directly entrop...
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