JPS6482762A - Digital image coding system - Google Patents

Digital image coding system

Info

Publication number
JPS6482762A
JPS6482762A JP62240126A JP24012687A JPS6482762A JP S6482762 A JPS6482762 A JP S6482762A JP 62240126 A JP62240126 A JP 62240126A JP 24012687 A JP24012687 A JP 24012687A JP S6482762 A JPS6482762 A JP S6482762A
Authority
JP
Japan
Prior art keywords
blocks
digital image
binary
vector quantization
standard deviation
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
JP62240126A
Other languages
Japanese (ja)
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 JP62240126A priority Critical patent/JPS6482762A/en
Publication of JPS6482762A publication Critical patent/JPS6482762A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To quantize image data of any gradation with high efficiency varying the threshold value of system switching according to a mean value when dividing gradational image data into blocks, extracting the mean value and standard deviation, and using the standard deviation value as a threshold value to switch a quantization system. CONSTITUTION:The image to be encoded is divided into specific blocks consisting of mXn picture elements and binary blocks obtained by coding picture elements in the respective divided blocks into binary data are used as input vectors to perform 1st vector quantization. Then the 2nd vector quantization of the digital image by the blocks is performed according to a digital image corresponding to an aimed picture element in a characteristic block for the binary reproduction block obtained by the 2nd vector quantization. Consequently, the digital image with gradations can be coded efficiently without deteriorating the picture quality.
JP62240126A 1987-09-24 1987-09-24 Digital image coding system Pending JPS6482762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62240126A JPS6482762A (en) 1987-09-24 1987-09-24 Digital image coding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62240126A JPS6482762A (en) 1987-09-24 1987-09-24 Digital image coding system

Publications (1)

Publication Number Publication Date
JPS6482762A true JPS6482762A (en) 1989-03-28

Family

ID=17054885

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62240126A Pending JPS6482762A (en) 1987-09-24 1987-09-24 Digital image coding system

Country Status (1)

Country Link
JP (1) JPS6482762A (en)

Similar Documents

Publication Publication Date Title
CN100355288C (en) Adaptive variable-length coding methods for image data
JPS64878A (en) Picture data compressing method
CA2000156A1 (en) Picture signal encoding and decoding apparatus
AU591941B2 (en) High efficiency technique for coding a digital video signal
CA2087994A1 (en) Geometric vector quantization
JP2003235043A (en) Adaptive process for decoding of a sequence of pictures
IE891366L (en) Method and system for compressing color video encoded data
EP0746160A3 (en) Video signal decoding method
KR930018537A (en) Video signal band compression device of digital VTR
MY120714A (en) Pixel block compression apparatus in an image processing system
US5007102A (en) Data compression using block list transform
EP0535272A1 (en) Hybrid encoder arrangement for an image processing system
CN103957426A (en) RGB565 true color image lossy compression and decompression method
JPS6482762A (en) Digital image coding system
EP0238254B1 (en) Data compression using block list transform
JPS55134576A (en) Still picture transmission system
JPS6482763A (en) Digital image coding system
EP0914005A3 (en) Apparatus and method for adaptive coding a binary shape signal
IL90023A0 (en) Method and system for compressing color video encoded data
JPS6482780A (en) Digital image encoding system
Nasiopoulos et al. A high-quality fixed-length compression scheme for color images
JPS5750181A (en) Multi-value dither coding system of video signal
JPS6473875A (en) Method and device for coding image data
JPS6374268A (en) Color picture data compression system
JPS6471390A (en) Orthogonal conversion encoding device