JPEG Metadata: A complete study
01 Aug 2018-
TL;DR: This paper detailed about the various types of JPEG markers and has shown experimental results that will help young researchers to get the basic idea about the JPEG metadata.
Abstract: JPEG is one of the widely used image format. As like other image formats, JPEG has its own special bytes called JPEG markers or metadata that gives relevant information about the image. In applications such as watermarking, image theft identification and digital forensics, where some kind of confidential information is embedded into the image either for copyright protection or image authentication. Usually this embedding is done on DCT coefficients. But with the use of quantization technique and compression nature of JPEG, the extraction/recovery of embedded data may not be possible all the times. A solution to this is to use quantized DCT coefficients for embedding. In order to decode the compressed data into quantized DCT coefficients, the encoding method used and also the type of chroma-subsampling used are to be known. This information is stored in the JPEG marker segment along with other relevant information. This paper detailed about the various types of JPEG markers and has shown experimental results. This will help young researchers to get the basic idea about the JPEG metadata.
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01 Jan 2016
TL;DR: The digital video and hdtv algorithms and interfaces is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can get it instantly.
Abstract: digital video and hdtv algorithms and interfaces is available in our book collection an online access to it is set as public so you can get it instantly. Our book servers saves in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the digital video and hdtv algorithms and interfaces is universally compatible with any devices to read.
219 citations
22 Feb 2021
TL;DR: For the operational solution of the system implementation issue, it is proposed to process and transfer the target information on the basis of existing compression algorithms, based on the draft standart of low-speed radio information service of the State Corporation for space activities “Roscosmos”.
Abstract: The system of video control for rocket and space technology products is considered. The main purpose of the video control system is to control the most important processes that accompany the movement of rocket and space technology products. The principles of construction and basic technical characteristics of the video system are proposed. The required functionality of the system, consisting in the video recording of the object, processing and formatting of video information, its transmission through the channel Board-Ground. A comparative analysis of the main technical characteristics of the existing video surveillance systems of domestic and foreign production, as well as the characteristics of the developed system. For the operational solution of the system implementation issue, it is proposed to process and transfer the target information on the basis of existing compression algorithms, based on the draft standart of low-speed radio information service of the State Corporation for space activities “Roscosmos”. Keywords video surveillance, video surveillance, vehicle frame, modulation, area coverage, bandwidth, sub-sampling, error-correction coding.
References
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TL;DR: The author provides an overview of the JPEG standard, and focuses in detail on the Baseline method, which has been by far the most widely implemented JPEG method to date, and is sufficient in its own right for a large number of applications.
Abstract: A joint ISO/CCITT committee known as JPEG (Joint Photographic Experts Group) has been working to establish the first international compression standard for continuous-tone still images, both grayscale and color. JPEG's proposed standard aims to be generic, to support a wide variety of applications for continuous-tone images. To meet the differing needs of many applications, the JPEG standard includes two basic compression methods, each with various modes of operation. A DCT (discrete cosine transform)-based method is specified for 'lossy' compression, and a predictive method for 'lossless' compression. JPEG features a simple lossy technique known as the Baseline method, a subset of the other DCT-based modes of operation. The Baseline method has been by far the most widely implemented JPEG method to date, and is sufficient in its own right for a large number of applications. The author provides an overview of the JPEG standard, and focuses in detail on the Baseline method. >
3,425 citations
"JPEG Metadata: A complete study" refers methods in this paper
...JPEG is a compressed image format [3] which generally does not use RGB colour space for processing....
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Book•
01 Jan 2003
TL;DR: Poynton's 1996 book A Technical Introduction to Digital Video became an industry favorite for its succinct, accurate, and accessible treatment of standard definition television (SDTV) In Digital Video and HDTV, Poynton augments that book with coverage of high definition television and compression systems.
Abstract: From the Publisher:
Rapidly evolving computer and communications technologies have achieved data transmission rates and data storage capacities high enough for digital video But video involves much more than just pushing bits! Achieving the best possible image quality, accurate color, and smooth motion requires understanding many aspects of image acquisition, coding, processing, and display that are outside the usual realm of computer graphics At the same time, video system designers are facing new demands to interface with film and computer system that require techniques outside conventional video engineering
Charles Poynton's 1996 book A Technical Introduction to Digital Video became an industry favorite for its succinct, accurate, and accessible treatment of standard definition television (SDTV) In Digital Video and HDTV, Poynton augments that book with coverage of high definition television (HDTV) and compression systems With the help of hundreds of high quality technical illustrations, this book presents the following topics:
Basic concepts of digitization, sampling, quantization, gamma, and filtering Principles of color science as applied to image capture and display Scanning and coding of SDTV and HDTV Video color coding: luma, chroma (4:2:2 component video, 4fSC composite video) Analog NTSC and PAL Studio systems and interfaces Compression technology, including M-JPEG and MPEG-2 Broadcast standards and consumer video equipment
507 citations
01 Jan 2016
TL;DR: The digital video and hdtv algorithms and interfaces is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can get it instantly.
Abstract: digital video and hdtv algorithms and interfaces is available in our book collection an online access to it is set as public so you can get it instantly. Our book servers saves in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Merely said, the digital video and hdtv algorithms and interfaces is universally compatible with any devices to read.
219 citations
"JPEG Metadata: A complete study" refers background in this paper
...Chroma subsampling[12-14] is a process of encoding images by specifying less resolution for chrominance (colour) information than for luminance (brightness) information, because human eyes are less sensitive to colour information than brightness....
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TL;DR: A camera signature is extracted from a JPEG image consisting of information about quantization tables, Huffman codes, thumbnails, and exchangeable image file format (EXIF) and it is shown that this signature is highly distinct across 1.3 million images spanning 773 different cameras and cell phones.
Abstract: It is often desirable to determine if an image has been modified in any way from its original recording. The JPEG format affords engineers many implementation trade-offs which give rise to widely varying JPEG headers. We exploit these variations for image authentication. A camera signature is extracted from a JPEG image consisting of information about quantization tables, Huffman codes, thumbnails, and exchangeable image file format (EXIF). We show that this signature is highly distinct across 1.3 million images spanning 773 different cameras and cell phones. Specifically, 62% of images have a signature that is unique to a single camera, 80% of images have a signature that is shared by three or fewer cameras, and 99% of images have a signature that is unique to a single manufacturer. The signature of Adobe Photoshop is also shown to be unique relative to all 773 cameras. These signatures are simple to extract and offer an efficient method to establish the authenticity of a digital image.
198 citations
"JPEG Metadata: A complete study" refers methods in this paper
...Since quantization technique used in JPEG round off the DCT coefficients [11] while using the standard decompression method, the extracted data may not be identical with the embedded one....
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30 Mar 2004
131 citations
"JPEG Metadata: A complete study" refers methods in this paper
...In 1992, JPEG File Interchange Format (JFIF) is introduced by including or embedding some metadata information in the image [2]....
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...Four modes or variations [2] are defined by the JPEG standard for the compression of images such as sequential DCT, sequential lossless, progressive DCT and hierarchical mode....
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