METHOD FOR CONVERTING INPUT IMAGE DATA INTO OUTPUT IMAGE DATA, IMAGE CONVERSION UNIT FOR CONVERTING INPUT IMAGE DATA INTO OUTPUT IMAGE DATA, IMAGE PROCESSING APPARATUS, DISPLAY DEVICE

METHOD FOR CONVERTING INPUT IMAGE DATA INTO OUTPUT IMAGE DATA, IMAGE CONVERSION UNIT FOR CONVERTING INPUT IMAGE DATA INTO OUTPUT IMAGE DATA, IMAGE PROCESSING APPARATUS, DISPLAY DEVICE

In a method and device for improving image rendition by contrast and/or sharpness enhancement the sharpness enhancement is made dependent on the local average luminance value. A mix is made of spatially enhanced image signals is used, wherein for various signal differing spatial frequencies are boos...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: DAMKAT, CHRIS
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:In a method and device for improving image rendition by contrast and/or sharpness enhancement the sharpness enhancement is made dependent on the local average luminance value. A mix is made of spatially enhanced image signals is used, wherein for various signal differing spatial frequencies are boosted. The mixing factors for mixing of the boosted signals are dependent on a local average luminance value such that the distribution over frequency bands shifts to higher frequencies and sharper enhancement as the luminance value increases.