no code implementations • 11 Aug 2020 • Hiroyuki Kobayashi, Hitoshi Kiya
The proposed method has a two-layer structure similar to JPEG XT, which consists of JPEG XS coding and a lossless coding method.
no code implementations • 25 Jul 2019 • Hiroyuki Kobayashi, Hitoshi Kiya
We proposed a lossless two-layer HDR coding method using a histogram packing technique.
no code implementations • 9 May 2019 • Hiroyuki Kobayashi, Osamu Watanabe, Hitoshi Kiya
The experimental results indicate that the proposed method exhibits not only a better near-lossless compression performance than that of the two-layer coding method of the JPEG XT, but also there are no issue regarding the combination of parameter values without losing backward compatibility to the JPEG standard.
no code implementations • 25 Apr 2019 • Hiroyuki Kobayashi, Hitoshi Kiya
In order to suppress the color distortion, we apply a novel hue compensation method based on the maximally saturated colors.
no code implementations • 17 Aug 2018 • Hiroyuki Kobayashi, Hitoshi Kiya
An encryption scheme of JPEG images in the bitstream domain is proposed.
no code implementations • 2 Aug 2018 • Osamu Watanabe, Hiroyuki Kobayashi, Hitoshi Kiya
The experimental results demonstrate that not only the proposed method has a better lossless compression performance than that of the JPEG XT, but also there is no need to determine image-dependent parameter values for good compression performance without losing the backward compatibility to the well known legacy JPEG standard.
no code implementations • 28 Jun 2018 • Osamu Watanabe, Hiroyuki Kobayashi, Hitoshi Kiya
The experimental results demonstrate that not only the proposed method has a better lossless compression performance than that of the JPEG XT, but also there is no need to determine image-dependent parameter values for good compression performance in spite of having the backward compatibility to the well known legacy JPEG standard.