Noise filtering in images

A temporal recursive filter unit ( 100,200,300,400 ) for noise filtering of a series of input images resulting in a series of output images comprises: means ( 102 ) for determining a value of a weighing factor, on basis of a difference between a first value of a first pixel of an input image and a s...

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Bibliographic Details
Main Authors SCHUTTEN ROBERT J, RIEMENS ABRAHAM K
Format Patent
LanguageEnglish
Published 02.06.2005
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:A temporal recursive filter unit ( 100,200,300,400 ) for noise filtering of a series of input images resulting in a series of output images comprises: means ( 102 ) for determining a value of a weighing factor, on basis of a difference between a first value of a first pixel of an input image and a second value of a second pixel of a first output image; and an adding ( 104 ) unit for calculating a third value of a third pixel of a second output image by adding of a first product of the value of the weighing factor and the first value of the first pixel, to a second product of a complement of the value of the weighing factor and the second value of the second pixel. The value ( 508 ) of the weighing factor is higher below a predetermined threshold ( 506 ) than above the threshold ( 506 ).
Bibliography:Application Number: US20040505496