JPS6451765A - Picture element density converting method - Google Patents

Picture element density converting method

Info

Publication number
JPS6451765A
JPS6451765A JP62208156A JP20815687A JPS6451765A JP S6451765 A JPS6451765 A JP S6451765A JP 62208156 A JP62208156 A JP 62208156A JP 20815687 A JP20815687 A JP 20815687A JP S6451765 A JPS6451765 A JP S6451765A
Authority
JP
Japan
Prior art keywords
picture element
area
converted
weighting factor
picture
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
JP62208156A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Hamashima
Takashi Uchiyama
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP62208156A priority Critical patent/JPS6451765A/en
Publication of JPS6451765A publication Critical patent/JPS6451765A/en
Pending legal-status Critical Current

Links

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  • Image Processing (AREA)
  • Editing Of Facsimile Originals (AREA)

Abstract

PURPOSE:To perform picture element density conversion with less picture quality deterioration within short processing time by judging what plural partial area in its circumference the picture element to be converted belongs to, and obtaining a weighting factor corresponding to said area. CONSTITUTION:The picture element to be converted is assumed to be P(k, l), and four reference picture elements O(i, j)-O(i+1, j+1) surrounding said picture element are considered, and the area between these four reference picture elements is divided into four parts respectively in two-dimensional directions. Then, it is decided what area among above-mentioned divided areas the picture element P(k, l) belongs to, and an address attached to the respective divided area is obtained. Next, as referring to a table, in which relation between the respective address and the weighting factor is stored, the weighting factor of the above-mentioned picture element P(k, l) to be converted is obtained. Next, a gradation value after conversion is obtained according to the gradation value of the picture element P(k, l) to be converted.
JP62208156A 1987-08-24 1987-08-24 Picture element density converting method Pending JPS6451765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62208156A JPS6451765A (en) 1987-08-24 1987-08-24 Picture element density converting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62208156A JPS6451765A (en) 1987-08-24 1987-08-24 Picture element density converting method

Publications (1)

Publication Number Publication Date
JPS6451765A true JPS6451765A (en) 1989-02-28

Family

ID=16551577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62208156A Pending JPS6451765A (en) 1987-08-24 1987-08-24 Picture element density converting method

Country Status (1)

Country Link
JP (1) JPS6451765A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366291A (en) * 1991-09-06 1994-11-22 Konica Corporation Temperature sensing device for a rotating fixing roller
US5418899A (en) * 1992-05-25 1995-05-23 Ricoh Company, Ltd. Size magnification processing unit for processing digital image in accordance with magnification factor
US6167216A (en) * 1996-10-21 2000-12-26 Sharp Kabushiki Kaisha Temperature sensor and toner image fixing device provided with said temperature sensor
US8854164B2 (en) 2006-11-27 2014-10-07 Robert Bosch Gmbh Pressure-regulating valve
US11959560B2 (en) 2019-05-08 2024-04-16 Eagle Industry Co., Ltd. Solenoid valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151771A (en) * 1982-03-05 1983-09-09 Konishiroku Photo Ind Co Ltd Converter of pictur element density
JPS61221879A (en) * 1985-03-27 1986-10-02 Fuji Xerox Co Ltd Picture enlargement and reduction circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151771A (en) * 1982-03-05 1983-09-09 Konishiroku Photo Ind Co Ltd Converter of pictur element density
JPS61221879A (en) * 1985-03-27 1986-10-02 Fuji Xerox Co Ltd Picture enlargement and reduction circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366291A (en) * 1991-09-06 1994-11-22 Konica Corporation Temperature sensing device for a rotating fixing roller
US5418899A (en) * 1992-05-25 1995-05-23 Ricoh Company, Ltd. Size magnification processing unit for processing digital image in accordance with magnification factor
US6167216A (en) * 1996-10-21 2000-12-26 Sharp Kabushiki Kaisha Temperature sensor and toner image fixing device provided with said temperature sensor
US8854164B2 (en) 2006-11-27 2014-10-07 Robert Bosch Gmbh Pressure-regulating valve
US11959560B2 (en) 2019-05-08 2024-04-16 Eagle Industry Co., Ltd. Solenoid valve

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