A Picture Browsing System

Netravali, Arun N.; Bowen, Elijah F. W.

doi:10.1109/tcom.1981.1094942

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Step 2-1 N D I I G I I F I Step 2-2 I I p e l / m m [9][10][11][12][13][14][15][16] I O O l X X X Tables 8 and 9 show t h e coding t a b l e s with AX = AY f o r s t e p s 1 -2 and 1 -3 (from s t e p s 2 -1 through 2 -10).…”

Section: Evaluation Of I N T E R P O L a T I O N A Lgorithmsmentioning

confidence: 99%

Progressive facsimile coding scheme for interactive image communications

Endoh

Yamazaki

1985

Electron. Comm. Jpn. Pt. I

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Recent developments have led to increased application of interactive image communications in teleconferencing and video disc systems. Many of these systems have facsimile transceivers as subsets. However, since conventional facsimile devices provide only hard copy, some soft copy display devices are desirable for interactive image communications. This paper proposes a progressive facsimile coding scheme for interactive image communications. This scheme permits rapid browsing of the images and image quality can be improved progressively if required. Simulation and experimental results indicate that the proposed scheme is more efficient than the standard coding scheme for G4 facsimile. Using the progressive coding scheme, the contents of most images can be recognized after 30 to 40% of the total transmission time. The applications of this efficient coding scheme in interactive image communications and the storage and retrieval of images are discussed.

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Section: Evaluation Of I N T E R P O L a T I O N A Lgorithmsmentioning

confidence: 99%

Progressive facsimile coding scheme for interactive image communications

Endoh

Yamazaki

1985

Electron. Comm. Jpn. Pt. I

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“…desired characteristics [4], or enable a teleconference with interactive transmission. The aim of progressive transmission is giving the viewer a recognizable picture quickly.…”

Section: Introductionmentioning

confidence: 99%

Progressive Transmission of Two-Tone Images

Johnsen¹,

Netravali²

1981

IEEE Trans. Commun.

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was born in Ewell, Surrey, England, in 1940. He received the Diploma in technology with honors and the M.S. degree from Loughborough University of Technology (formerly Loughborough College of Technology), Loughborough, Leics., England, in 1961 and 1966, respectively. His master's thesis was on wide-band high frequency transistor amplifiers.During 1961-1962 he worked on camera tube development at the English Electric Valve Company, Chelmsford, Essex, England, and then spent two years in the Submerged Repeater Abstract-A technique is propoked for transmitting two-tone imagesin. a progression of stages. In the first stage, information is transmitted to allow a crude reproduction of the picture. In the following stages, the quality of the received picture is improved until a copy identical to the original is obtained. The proposed technique uses a modification of the two-dimensional code recommended by the CCITT for transmission of facsimile. The main features of the coding scheme are as follows. 1) A crude version. of the image is obtained after approximately10-20 percent.of the total transmission time. A good version, with half the resolution in both the horizontal and vertical directions, is obtained after 50 percent of the total transmission time. 2) Compatibility with the CCITT codes for transmission of facsimile. 3) Total transmission time is only about 20 percent larger than the time required for nonprogressive transmission using the CCITT codes.

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Transmission of gray level images by multilevel dither techniques

Pirsch

Netravali²

1983

Computers & Graphics

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A Picture Browsing System

Cited by 5 publications

References 5 publications

Progressive facsimile coding scheme for interactive image communications

Progressive facsimile coding scheme for interactive image communications

Progressive Transmission of Two-Tone Images

Transmission of gray level images by multilevel dither techniques

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