High quality document image compression with “DjVu”

1998 ◽  
Vol 7 (3) ◽  
pp. 410 ◽  
Author(s):  
Le´on Bottou
Keyword(s):  
Image Compression ◽  
Document Image ◽  
High Quality

Entropy-Based Selection of Cluster Representatives for Document Image Compression

2019 ◽  
Vol 12 (4) ◽  
pp. 1720-1738
Author(s):  
Luis F. Mun͂oz-Pérez ◽  
José A. Guerrero ◽  
Jorge E. Macías-Díaz
Keyword(s):  
Image Compression ◽  
Document Image ◽  
Selection Of

scholarly journals A method for reducing information redundancy of digital images for cloud storage

Connectivity ◽  
2020 ◽  
Vol 148 (6) ◽  
Author(s):  
Yu. I. Katkov ◽  
◽  
O. S. Zvenigorodsky ◽  
O. V. Zinchenko ◽  
V. V. Onyshchenko ◽  
...  
Keyword(s):  
Image Compression ◽  
Video Compression ◽  
Cloud Storage ◽  
Video Data ◽  
Information Redundancy ◽  
High Quality ◽  
Video Information ◽  
Quality Video ◽  
High Quality Video

The article is devoted to the topical issue of finding new effective and improving existing widespread compression methods in order to reduce computational complexity and improve the quality of image-renewable image compression images, is important for the introduction of cloud technologies. The article presents a problem To increase the efficiency of cloud storage, it is necessary to determine methods for reducing the information redundancy of digital images by fractal compression of video content, to make recommendations on the possibilities of applying these methods to solve various practical problems. The necessity of storing high-quality video information in new HDTV formats 2k, 4k, 8k in cloud storage to meet the existing needs of users has been substantiated. It is shown that when processing and transmitting high quality video information there is a problem of reducing the redundancy of video data (image compression) provided that the desired image quality is preserved, restored by the user. It has been shown that in cloud storage the emergence of such a problem is historically due to the contradiction between consumer requirements for image quality and the necessary volumes and ways to reduce redundancy of video data, which are transmitted over communication channels and processed in data center servers. The solution to this problem is traditionally rooted in the search for effective technologies for compressing, archiving and compressing video information. An analysis of video compression methods and digital video compression technology has been performed, which reduces the amount of data used to represent the video stream. Approaches to image compression in cloud storage under conditions of preservation or a slight reduction in the amount of data that provide the user with the specified quality of the restored image are shown. Classification of special compression methods without loss and with information loss is provided. Based on the analysis, it is concluded that it is advisable to use special methods of compression with loss of information to store high quality video information in the new formats HDTV 2k, 4k, 8k in cloud storage. The application of video image processing and their encoding and compression on the basis of fractal image compression is substantiated. Recommendations for the implementation of these methods are given.

scholarly journals METHOD OF IMITATION OF MODERN PASSPORT DOCUMENTS WITH THE USE OF THE NEWEST PRINTING TECHNOLOGIES

2019 ◽  
pp. 427-434
Author(s):  
Keyword(s):  
Document Image ◽  
Ultraviolet Rays ◽  
High Quality ◽  
Peak Loads ◽  
Modern Development ◽  
Technical Examination ◽  
Visible Images ◽  
Analysis Of Results ◽  
State Boundary ◽  
Short Time

Modern development of printing technologies, which allows for short time and with high quality to represent different properties of visible images, instrumental in the improvement of existent methods of imitation of documents. Therefore, with the purpose of high-quality lead through of technical examination of documents it is necessary read-throughs of permanent analysis of information about found out the methods of imitation. Analysis of results forensic science Forensic document center State border guard service of Ukraine testifies to the increase of cases of the use of counterfeit passport documents (passports of Israel, Turkey, France, Sweden) with the inflicted photo of bearer on laminate tape which covers the page of information. Thus, closeness of layer of dye which was used for causing of the second photo did not enable to discover primary in the infra-red rays of light. The second photo was inflicted by finishing printing over laminate tape with the use of stream seal, without sorting out of book block. The analysis of technical descriptions of modern facilities of the contactless printing to show that for the imitation of passports of citizens, countries listed above, used technology of the so-called «UF-printing». Its feature is application in the process of seal of effect of polymerization blackened (paints) under the action of ultraviolet rays. Such technology enables, including polymeric tapes to inflict any images practically on any material, and also allows to create high-quality relief images. Taking into account possibilities technologists of «UF-printing», it can be used with the purpose of high-quality imitation of deep print and relief stamping. Application of this technology for the imitation of documents can complicate finding out imitations during realization of border control, especially, in the clock of peak-loads in the points of admission through a state boundary. And also increases economic feasibilities of offenders for realization of imitation of different documents. In modern terms at the improvement of facilities of defense of documents, the methods of their imitation will be perfected constantly. There is a problem of shortage of information about such imitations. Therefore the actual is become by the necessity of modernization of existing and development of new informative materials in relation to the technological features of making of different sort of documents with the use of methods seals which determine properties of visible in a document image. Key words: passport documents, printing technologies, fake.

High-Quality Color Image Compression by Quantization Crossing Color Spaces

2019 ◽  
Vol 29 (5) ◽  
pp. 1474-1487 ◽  
Author(s):  
Shuyuan Y. Zhu ◽  
Zhiying Y. He ◽  
Chen Chen ◽  
Shuaicheng C. Liu ◽  
Jiantao Zhou ◽  
...  
Keyword(s):  
Image Compression ◽  
Color Image ◽  
Color Spaces ◽  
High Quality ◽  
Color Image Compression

New technology for raster document image compression

1999 ◽  
Author(s):  
Kai-Uwe Barthel ◽  
Simon McPartlin ◽  
Michael Thierschmann
Keyword(s):  
Image Compression ◽  
New Technology ◽  
Document Image
Sign in / Sign up

Export Citation Format

Share Document