JPS6423376A - Picture input device - Google Patents

Picture input device

Info

Publication number
JPS6423376A
JPS6423376A JP17885587A JP17885587A JPS6423376A JP S6423376 A JPS6423376 A JP S6423376A JP 17885587 A JP17885587 A JP 17885587A JP 17885587 A JP17885587 A JP 17885587A JP S6423376 A JPS6423376 A JP S6423376A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
light quantity
picture
fluctuated
gradation
fluctuation
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
JP17885587A
Inventor
Tetsuo Hizuka
Masahito Nakajima
Noriyuki Hiraoka
Hiroyuki Tsukahara
Takuya Uzumaki
Original Assignee
Fujitsu 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

Links

Abstract

PURPOSE:To realize the proper correction of a picture having a fluctuated light quantity distribution regardless of the fluctuation value of the light quantity, by dividing said picture into plural small areas and correcting the fluctuation of light quantity based on the average light quantity of each small area. CONSTITUTION:When the white level data is produced, a gradation dividing means 12 divides equally the gradation of a fluctuated light quantity distribution obtained by photographing a subject, e.g., a white paper having an even surface by an image pickup means 11. An area dividing means 13 divides a picture having the fluctuated light quantity distribution into plural small areas in accordance with each gradation divided by the means 12. Thus it is possible to obtain the small areas corresponding to each gradation of the fluctuated light quantity distribution. Then a small area having a large width is set data part having the small fluctuation of light quantity and vice versa. In other words, the correction value resolution is constant in any small area and therefore the proper correction is applied for a picture having a fluctuated light quantity distribution regardless of the fluctuation value of the light quantity.
JP17885587A 1987-07-20 1987-07-20 Picture input device Pending JPS6423376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17885587A JPS6423376A (en) 1987-07-20 1987-07-20 Picture input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17885587A JPS6423376A (en) 1987-07-20 1987-07-20 Picture input device

Publications (1)

Publication Number Publication Date
JPS6423376A true true JPS6423376A (en) 1989-01-26

Family

ID=16055858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17885587A Pending JPS6423376A (en) 1987-07-20 1987-07-20 Picture input device

Country Status (1)

Country Link
JP (1) JPS6423376A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009190624A (en) * 2008-02-15 2009-08-27 Denso Corp Electronic control device, and computing method in electronic control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009190624A (en) * 2008-02-15 2009-08-27 Denso Corp Electronic control device, and computing method in electronic control device

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