JPS6482763A - Digital image coding system - Google Patents

Digital image coding system

Info

Publication number
JPS6482763A
JPS6482763A JP24012787A JP24012787A JPS6482763A JP S6482763 A JPS6482763 A JP S6482763A JP 24012787 A JP24012787 A JP 24012787A JP 24012787 A JP24012787 A JP 24012787A JP S6482763 A JPS6482763 A JP S6482763A
Authority
JP
Japan
Prior art keywords
digital image
picture elements
limiting
feature quantities
representative values
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.)
Granted
Application number
JP24012787A
Other languages
Japanese (ja)
Other versions
JP2561294B2 (en
Inventor
Masahiro Funada
Yoshiyuki Suzuki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP24012787A priority Critical patent/JP2561294B2/en
Publication of JPS6482763A publication Critical patent/JPS6482763A/en
Application granted granted Critical
Publication of JP2561294B2 publication Critical patent/JP2561294B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

PURPOSE:To realize image reproduction of high quality with a simple constitution limiting picture elements according to features of a block obtained by binary encoding and then limiting the picture elements. CONSTITUTION:An image to be encoded is divided into specific blocks consisting of mXn picture elements and feature quantities indicating representative values and contrast in the respective blocks are found. Then the digital images of the respective blocks are quantized under quantization conditions determined by deciding whether the feature quantities are large or small under decision conditions corresponding to the representative values. Consequently, digital image encoding which encodes the gradational digital image efficiently without deteriorating the picture quality is performed with the simple constitution.
JP24012787A 1987-09-24 1987-09-24 Image coding device Expired - Fee Related JP2561294B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24012787A JP2561294B2 (en) 1987-09-24 1987-09-24 Image coding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24012787A JP2561294B2 (en) 1987-09-24 1987-09-24 Image coding device

Publications (2)

Publication Number Publication Date
JPS6482763A true JPS6482763A (en) 1989-03-28
JP2561294B2 JP2561294B2 (en) 1996-12-04

Family

ID=17054899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24012787A Expired - Fee Related JP2561294B2 (en) 1987-09-24 1987-09-24 Image coding device

Country Status (1)

Country Link
JP (1) JP2561294B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62140552A (en) * 1985-12-13 1987-06-24 Canon Inc Encoding method for image

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62140552A (en) * 1985-12-13 1987-06-24 Canon Inc Encoding method for image

Also Published As

Publication number Publication date
JP2561294B2 (en) 1996-12-04

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees