GB8813514D0 - Image enhancement - Google Patents

Image enhancement

Info

Publication number
GB8813514D0
GB8813514D0 GB888813514A GB8813514A GB8813514D0 GB 8813514 D0 GB8813514 D0 GB 8813514D0 GB 888813514 A GB888813514 A GB 888813514A GB 8813514 A GB8813514 A GB 8813514A GB 8813514 D0 GB8813514 D0 GB 8813514D0
Authority
GB
United Kingdom
Prior art keywords
derived
frequency
image enhancement
function
total
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
GB888813514A
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.)
Quantel Ltd
Original Assignee
Quantel 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 Quantel Ltd filed Critical Quantel Ltd
Priority to GB888813514A priority Critical patent/GB8813514D0/en
Publication of GB8813514D0 publication Critical patent/GB8813514D0/en
Priority to PCT/GB1989/000619 priority patent/WO1989012278A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/40—Image enhancement or restoration by the use of histogram techniques
    • G06T5/92—

Abstract

An image enhancement system for processing input intensity related pixel data to produce similar output data in response to a mapping function. The mapping function consists of an output value for all possible input values and is derived by integrating a logarithmically scaled frequency function. The frequency function represents the number of times each intensity level is present in the input data and the logarithmic scaling results in each addition to a frequency total increasing said total by a diminishing increment. The invention allows mapping functions to be derived from histograms even when a relatively small object of interest is shown against a large background.
GB888813514A 1988-06-08 1988-06-08 Image enhancement Pending GB8813514D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB888813514A GB8813514D0 (en) 1988-06-08 1988-06-08 Image enhancement
PCT/GB1989/000619 WO1989012278A1 (en) 1988-06-08 1989-06-05 Method and apparatus for image enhancement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888813514A GB8813514D0 (en) 1988-06-08 1988-06-08 Image enhancement

Publications (1)

Publication Number Publication Date
GB8813514D0 true GB8813514D0 (en) 1988-07-13

Family

ID=10638254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB888813514A Pending GB8813514D0 (en) 1988-06-08 1988-06-08 Image enhancement

Country Status (2)

Country Link
GB (1) GB8813514D0 (en)
WO (1) WO1989012278A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6731798B1 (en) 1998-04-30 2004-05-04 General Electric Company Method for converting digital image pixel values including remote services provided over a network
US6714674B1 (en) * 1998-04-30 2004-03-30 General Electric Company Method for converting digital image pixel values

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL70214A (en) * 1983-11-13 1987-10-20 Elscint Ltd Image contrast enhancement arrangement
JPS61168078A (en) * 1985-01-15 1986-07-29 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Image processing

Also Published As

Publication number Publication date
WO1989012278A1 (en) 1989-12-14

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