Topic
Lossless JPEG
About: Lossless JPEG is a research topic. Over the lifetime, 2415 publications have been published within this topic receiving 51110 citations. The topic is also known as: Lossless JPEG & .jls.
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Papers
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14 Oct 2014TL;DR: In this article, a method of efficient lossless mode syntax signaling for a coding system supporting both lossless and lossy coding is disclosed. But this method requires the coding units in the picture level to decide whether to use a forced lossless coding mode if lossless codes are allowed for the current picture.
Abstract: A method of efficient lossless mode syntax signaling for a coding system supporting both lossless and lossy coding is disclosed. In one embodiment, a first syntax element is incorporated in a picture level to indicate whether to use a forced lossless coding mode if lossless coding is allowed for the current picture. If the first syntax indicates that the forced lossless coding mode is selected, all coding units in the slices of the picture are coded using lossless coding. If the first syntax indicates that the forced lossless coding mode is not selected, each coding unit in a slice of the picture can be coded according to a second syntax element indicating whether each coding unit is coded using lossless coding or not. In another embodiment, the forced lossless mode can be applied to coding units on a slice by slice basis.
5 citations
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01 Sep 2007TL;DR: An efficient and simple context-based data modelling technique for lossless image compression is described, which uses only 3 contexts, which makes it time-efficient, and does not force the message headers to be long.
Abstract: An efficient and simple context-based data modelling technique for lossless image compression is described in the paper. Similarly as preprocessing stage of JPEG-LS, it uses only 3 contexts, which makes it time-efficient, and does not force the message headers to be long. Enhanced, but more computationally complex versions of the method are also analyzed. Extensive experiments show that indeed, the new technique is clearly better from data compression point of view than the preprocessing stage of JPEG-LS, while its computational complexity is approximately the same.
5 citations
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01 Dec 2016TL;DR: A new approach to estimate the quality factor value for a JPEG image based on the statistical model of variance of blocks 8 × 8 for JPEG images, characterized by two parameters which are used to calculate a distance between the first and the second compressions.
Abstract: The goal of the paper is to present a new approach to estimate the quality factor value for a JPEG image. This approach is based on the statistical model of variance of blocks 8 × 8 for JPEG images. The variance model follows Gamma distribution, characterized by two parameters which are used to calculate a distance between the first and the second compressions. The distance in case of compressing images twice with the same value of quality factor is exploited as characterized fingerprint for quality factor identification of a JPEG image. Experiments with simulated and real images highlight the relevance of the proposed approach.
5 citations
01 Jan 2013
TL;DR: An efficient image compression approach based on JPEG image compression is presented based on VB.NET for converting and compressing images in JPEG format to propose a relation between image quality with the amount of image compression.
Abstract: This paper presents an efficient image compression approach based on JPEG image compression. JPEG is the most frequently applied image compression technique in today"s world. We have developed an application based on VB.NET for converting and compressing images in JPEG format. Using this application we finally propose a relation between image quality with the amount of image compression.
5 citations