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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Bibliographische Detailangaben
Hauptverfasser:	SCHUTTEN ROBERT J, RIEMENS ABRAHAM K
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMAGE DATA PROCESSING OR GENERATION, IN GENERAL PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	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 ).