JPS5582379A - Edge processing method in picture processing - Google Patents

Edge processing method in picture processing

Info

Publication number
JPS5582379A
JPS5582379A JP15592878A JP15592878A JPS5582379A JP S5582379 A JPS5582379 A JP S5582379A JP 15592878 A JP15592878 A JP 15592878A JP 15592878 A JP15592878 A JP 15592878A JP S5582379 A JPS5582379 A JP S5582379A
Authority
JP
Japan
Prior art keywords
level
picture
rom
data
input
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
JP15592878A
Other languages
Japanese (ja)
Inventor
Mamoru Maeda
Morizumi Kurose
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 JP15592878A priority Critical patent/JPS5582379A/en
Publication of JPS5582379A publication Critical patent/JPS5582379A/en
Pending legal-status Critical Current

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  • Image Processing (AREA)

Abstract

PURPOSE: To make edge emphasis and edge extraction easy by using an ROM having N-number addresses to convert picture data, which can be expressed with N- number gradations, to one output of the half-tone level.
CONSTITUTION: Input data of N-level digitized picture densities from a scanner are applied to one ROM as addresses A0WA3, and data transfer clock RD synchronized with input data is used as a strobe to read data D0WD3 from the ROM. In case of input data of a picture expressed with 16 gradations, contents of the ROM are as shown in figure 4 for the edge processing where levels 0W5, levels 12W15 and levels 6W11 are a low level, a high level and a half tone respectively. By this method, input of picture data of level 5 is converted to the output of level 0 by reading contents of address 5 immediately, and similarly, input of level 7 is converted to the output of level 1.
COPYRIGHT: (C)1980,JPO&Japio
JP15592878A 1978-12-18 1978-12-18 Edge processing method in picture processing Pending JPS5582379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15592878A JPS5582379A (en) 1978-12-18 1978-12-18 Edge processing method in picture processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15592878A JPS5582379A (en) 1978-12-18 1978-12-18 Edge processing method in picture processing

Publications (1)

Publication Number Publication Date
JPS5582379A true JPS5582379A (en) 1980-06-21

Family

ID=15616569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15592878A Pending JPS5582379A (en) 1978-12-18 1978-12-18 Edge processing method in picture processing

Country Status (1)

Country Link
JP (1) JPS5582379A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06266826A (en) * 1992-07-31 1994-09-22 E I Du Pont De Nemours & Co Raster image processing method and apparatus with pixel mapping enabling image boundary density distribution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06266826A (en) * 1992-07-31 1994-09-22 E I Du Pont De Nemours & Co Raster image processing method and apparatus with pixel mapping enabling image boundary density distribution

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