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Image file formats

About: Image file formats is a research topic. Over the lifetime, 10349 publications have been published within this topic receiving 102407 citations.


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Proceedings ArticleDOI
14 Nov 2000
TL;DR: The design, implementation, and evaluation of the Image Transport Protocol (ITP) for image transmission over loss-prone congested or wireless networks are described and a variety of new receiver post-processing algorithms such as error concealment are enabled that further improve the interactivity and responsiveness of reconstructed images.
Abstract: Images account for a significant and growing fraction of Web downloads. The traditional approach to transporting images uses TCP, which provides a generic reliable, in-order byte-stream abstraction, but which is overly, restrictive for image data. We analyze the progression of image quality at the receiver with time and show that the in-order delivery abstraction provided by a TCP-based approach prevents the receiver application from processing and rendering portions of an image when they, actually, arrive. The end result is that an image is rendered in bursts interspersed with long idle times rather than smoothly. This paper describes the design, implementation, and evaluation of the Image Transport Protocol (ITP) for image transmission over loss-prone congested or wireless networks. ITP improves user-perceived latency using application level framing (ALF) and out-of-order pplication data unit (ADU) delivery achieving significantly better interactive performance as measured by the evolution of peak signal-to-noise ratio (PSNR) with time at the receiver ITP runs over UDP, incorporates receiver-driven selective reliability uses the congestion manager (CM) to adapt to network congestion, and is customizable for specific image formats (e.g., JPEG and JPEG2000). ITP enables a variety of new receiver post-processing algorithms such as error concealment that further improve the interactivity and responsiveness of reconstructed images. Performance experiments using our implementation across a variety of loss conditions demonstrate the benefits of ITP in improving the interactivity of image downloads at the receiver.

29 citations

Patent
22 Dec 1988
TL;DR: In this article, an image data filing system is proposed, where an original drawing is converted into digital image data, which is made to have a unity-scale for file management, then divided into several divisional image data having a fixed data size as units of storing data within a record file, and also, a high speed reduced/enlarged display similar to original-size one because of storing the image data of several different scales within the record file.
Abstract: An image data filing system wherein an original drawing is converted into digital image data, which is made to have a unity-scale for file management, then divided into several divisional image data having a fixed data size as units of storing data within a record file, can easily perform a continuous display with adjacent drawings, and also, a high speed reduced/enlarged display similar to original-size one because of storing the image data of several different scales within the record file.

29 citations

Journal ArticleDOI
TL;DR: If variations in radiodensity data are introduced by lossy Joint Photographic Experts Group (JPEG) compression and/or the use of three software programs, at least two of the software programs performed JPEG image decompression differently.
Abstract: OBJECTIVES To determine if variations in radiodensity data are introduced by lossy Joint Photographic Experts Group (JPEG) compression and/or the use of three software programs. METHODS An occlusal film with an aluminium step wedge was exposed, processed and digitized under standard conditions. Before the image was saved, the coordinates and the gray-scale value for each pixel in a 20 x 20 pixel area near the middle of the thickest step were recorded. These pixel coordinates and gray-scale values served as Truth 1. In addition, a digital simulated-radiographic image with assigned gray-scale values for each pixel was created and served as Truth 2. The digital data for the scanned radiograph and the simulated radiograph were saved as Tagged Image File Format (TIFF) and lossy JPEG files. Each file was opened with three software programs and the gray-scale values of homologous pixels were recorded. For these pixels in each image type, the mean gray-scale values and standard deviations were calculated. The pix...

29 citations

Patent
14 Jun 1994
TL;DR: In this article, a method of combining data sets of heterogeneous image formats, such as PDL's, is presented in a printing system, where a first image data set is translated by a coprocessor, using an interpretation code among many stored in memory.
Abstract: A method of combining data sets of heterogeneous image formats, such as PDL's. in a printing system. A first image data set is translated by a coprocessor, using an interpretation code among many stored in memory. In response to "end of job" data in the first image data set, the first image data set in a final image format is transferred to the memory, and a second image data set is transferred from the memory to the coprocessor. The image format of the second image data set is determined. An interpretation code for translating the second image data set is loaded into the coprocessor.

28 citations

Patent
18 Jan 2007
TL;DR: In this paper, the problem that though the resolution of a recent digital camera is greatly improved and a detailed image can be photographed, the size of an image file is increased, and the transfer time is lengthened in the case of storing and reading into/from storage equipment, operability is spoiled, and since the image is resized according to paper size and then printed in case of printing, the print time becomes long.
Abstract: PROBLEM TO BE SOLVED: To solve the problem that though the resolution of a recent digital camera is greatly improved and a detailed image can be photographed, size of an image file is increased, and transfer time of an image is lengthened in the case of storing and reading into/from storage equipment, operability is spoiled, and that since the image is resized according to paper size and then printed in the case of printing, the print time becomes long SOLUTION: Since resize processing of an image is frequently performed in the case of printing, the image is resized first in the case of transferring the image to a digital camera and transfer data quantity can be reduced Also, the resized image is stored, so that the resize processing in the case of printing can be eliminated, and the print time can be shortened COPYRIGHT: (C)2007,JPO&INPIT

28 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20238
202222
2021124
2020269
2019373
2018382