METHOD AND DEVICE FOR DETECTING POINTS IN MOTION IN A TELEVISION IMAGE FOR DIGITAL TELEVISION SYSTEMS WITH CONDITIONAL REFRESH RATE COMPRESSION

Abstract

Abstract Translated from French LE DISPOSITIF SELON L'INVENTION CONSISTE A CALCULER UN INDICATEUR DE GRADIENT I DE LUMINANCE ETOU DE CHROMINANCE EN CHAQUE POINT DE L'IMAGE, A CALCULER EN FONCTION DE CHAQUE INDICATEUR OBTENU UNE VALEUR DE SEUIL S(X), A MESURER LA DIFFERENCE DE LUMINANCE ETOU DE CHROMINANCE INTER-IMAGE DE CHAQUE POINT DE L'IMAGE, A COMPARER LA DIFFERENCE INTER-IMAGE OBTENUE EN CHAQUE POINT A LA VALEUR DE SEUIL CORRESPONDANTE CALCULEE, A APPLIQUER LE RESULTAT DE LA COMPARAISON A L'ENTREE D'UN DISPOSITIF DE FILTRAGE PAR DENSITE 19 POUR DETECTER LA DENSITE DE POINTS EN MOUVEMENT PROCHES DE CHAQUE POINT ANALYSE ET A COMPARER LA DENSITE OBTENUE POUR CHAQUE POINT A UN SEUIL DE DENSITE PREDETERMINE POUR FOURNIR UNE INDICATION DE POINTS EN MOUVEMENT LORSQUE LA DENSITE EN CHAQUE POINT CONSIDERE DEPASSE LE SEUIL DE DENSITE PREDETERMINE. APPLICATION : SYSTEME DE COMPRESSION DE DONNEES NUMERIQUES EN TELEVISION. THE DEVICE ACCORDING TO THE INVENTION CONSISTS OF CALCULATING A GRADIENT I LUMINANCE AND OR CHROMINANCE INDICATOR AT EACH POINT OF THE IMAGE, TO CALCULATE AS A FUNCTION OF EACH INDICATOR OBTAINED A THRESHOLD VALUE S (X), MEASURING THE LUMINANCE DIFFERENCE INTER-IMAGE CHROMINANCE LOCK AT EACH POINT OF THE IMAGE, TO COMPARE THE INTER-IMAGE DIFFERENCE OBTAINED AT EACH POINT WITH THE CORRESPONDING THRESHOLD VALUE CALCULATED, TO APPLY THE RESULT OF THE COMPARISON TO THE INPUT OF A FILTERING DEVICE BY DENSITY 19 TO DETECT THE DENSITY OF MOVING POINTS CLOSE TO EACH POINT ANALYSIS AND TO COMPARE THE DENSITY OBTAINED FOR EACH POINT TO A PREDETERMINED DENSITY THRESHOLD TO PROVIDE AN INDICATION OF MOVING POINTS WHEN THE DENSITY AT EACH POINT CONSIDERS IT PREDETERMINED DENSITY. APPLICATION: DIGITAL DATA COMPRESSION SYSTEM IN TELEVISION.

Inventors

• 👤 Jean-Yves Catros
• 👤 Franck Chapuis
• 👤 Francois Malo-Renault

Bibliographic Details