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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01 Jan 2005
TL;DR: This paper proposes a watermarking scheme that is reversible and robust to JPEG compression, and uses ultrasound images to verify the integrity and authenticity of medical images.
Abstract: This paper will discuss the properties of watermarking medical images. We will also discuss the possibility of such images being compressed by JPEG and give an overview of JPEG compression. We will then propose a watermarking scheme that is reversible and robust to JPEG compression. The purpose is to verify the integrity and authenticity of medical images. We used 800times600times8 bits ultrasound (US) images in our experiment. SHA-256 of the image is then embedded in the least significant bits (LSB) of an 8times8 block in the region of non interest (RONI). The image is then compressed using JPEG and decompressed using Photoshop 6.0. If the image has not been altered, the watermark extracted will match the hash (SHA256) of the original image. The result shown that the embedded watermark is robust to JPEG compression up to image quality 60 (~91% compressed)
11 citations
01 Jan 2014
TL;DR: The implementation of the JPEG compression on a field programmable gate array minimise the logic resources of the FPGA and the latency at each stage of compression to target minimal FPGa resource usage without compromising encoded-image quality.
Abstract: This paper presents the implementation of the JPEG compression on a field programmable gate array.It minimise the logic resources of the FPGA and the latency at each stage of compression. The JPEG standard defines compression techniques for image data. It permits to store and transfer image data with considerably reduced demand for storage space and bandwidth. The encoder compresses an image as a stream of 8×8 blocks with each element of the block applied and processed individually. The encoder is implemented on Xilinx Spartan-3 FPGA. JPEG encoder that targets minimal FPGA resource usage without compromising encoded-image quality.
11 citations
01 Jan 2005
TL;DR: This work proposes to use the wavelet-based JPEG2000 image compression algorithm for feature extraction and discusses the sensitivity of the proposed method against different malicious data modifications including local image alterations and Stirmark attacks.
Abstract: Robust visual hash functions have been designed to ensure the data integrity of digital visual data. Such algorithms rely on an efficient scheme for robust visual feature extraction. We propose to use the wavelet-based JPEG2000 image compression algorithm for feature extraction. We discuss the sensitivity of our proposed method against different malicious data modifications including local image alterations and Stirmark attacks.
11 citations
02 Sep 2002
TL;DR: An implementation without the entropy encoder is shown that uses less than half of the resources of the FPGA and operates at high frame rates.
Abstract: The JPEG 2000 is a well known standard and has some important changes to the former JPEG standard. The use of wavelet transformation and arithmetic entropy encoding improves the image quality and compression ratio significantly. This paper enlightens how this standard can be implemented on a Virtex 1000 FPGA processor and where the drawbacks and compromises between quality and efficiency are. An implementation without the entropy encoder is shown that uses less than half of the resources of the FPGA and operates at high frame rates.
11 citations
TL;DR: The proposed error resilient coding scheme for JPEG image transmission based on data embedding and side-match vector quantization (VQ) is proposed and can recover high-quality JPEG images from the corresponding corrupted images up to a block loss rate (BLR) of 30%.
11 citations