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JPS5510202A - Compression system of facsimile - Google Patents

Compression system of facsimile

Info

Publication number
JPS5510202A
JPS5510202A JP8005778A JP8005778A JPS5510202A JP S5510202 A JPS5510202 A JP S5510202A JP 8005778 A JP8005778 A JP 8005778A JP 8005778 A JP8005778 A JP 8005778A JP S5510202 A JPS5510202 A JP S5510202A
Authority
JP
Japan
Prior art keywords
correlation
change point
point
compression
dimention
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8005778A
Other languages
Japanese (ja)
Inventor
Akira Konishi
Noboru Murayama
Sho Taniguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP8005778A priority Critical patent/JPS5510202A/en
Publication of JPS5510202A publication Critical patent/JPS5510202A/en
Pending legal-status Critical Current

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  • Image Processing (AREA)

Abstract

PURPOSE: To code a facsimile picture efficiently by making a check on correlation near the change point of data and by employing one-dimentional compression and two-dimentional compression.
CONSTITUTION: The correlation at picture signal change point TPi changing from a white line between character to a character line or reversely is checked between change point TPi-1 right before the point and a point on a preceding scanning line close to TPi-1. On the basis of correlation prediction, coding algorithm for change points is selected. When correlation is recognized through this partial correlation prediction, the change point to be coded is coded (in two dimention) by previously-fixed pattern display codes of a specific pattern if formed of the change point and the preceding scanning line and when not, on the other hand, Hoffman coding (in one dimention) is done with a discrimination bit appended.
COPYRIGHT: (C)1980,JPO&Japio
JP8005778A 1978-06-30 1978-06-30 Compression system of facsimile Pending JPS5510202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8005778A JPS5510202A (en) 1978-06-30 1978-06-30 Compression system of facsimile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8005778A JPS5510202A (en) 1978-06-30 1978-06-30 Compression system of facsimile

Publications (1)

Publication Number Publication Date
JPS5510202A true JPS5510202A (en) 1980-01-24

Family

ID=13707598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8005778A Pending JPS5510202A (en) 1978-06-30 1978-06-30 Compression system of facsimile

Country Status (1)

Country Link
JP (1) JPS5510202A (en)

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