Fatih Kamışlı

E-mail

kamisli@metu.edu.tr

Department

Department of Electrical and Electronics Engineering

ORCID

0000-0001-7112-1633

Scopus Author ID

15052106200

Web of Science Researcher ID

W-5072-2018

A learned pixel-by-pixel lossless image compression method with 59K parameters and parallel decoding Gümüş, Sinem; Kamışlı, Fatih (2023-01-01) This paper considers lossless image compression and presents a learned compression system that can achieve state-of-the-art lossless compression performance but uses only 59K parameters, which is one or two order of magnit...
Image compression with learned lifting-based DWT and learned tree-based entropy models Sahin, Ugur Berk; Kamışlı, Fatih (2023-01-01) This paper explores learned image compression based on traditional and learned discrete wavelet transform (DWT) architectures and learned entropy models for coding DWT subband coefficients. A learned DWT is obtained throug...
An Artificial Neural Network Based Pixel-by-Pixel Lossless Image Compression Method Kamışlı, Fatih (2022-05-15)
End-to-end learned image compression with conditional latent space modeling for entropy coding Yesilyurt, Aziz Berkay; Kamışlı, Fatih (2021-01-24) The use of neural networks in image compression enables transforms and probability models for entropy coding which can process images based on much more complex models than the simple Gauss-Markov models in traditional com...
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; 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...

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