Temporal Filtering of Line Scratch Detections in Degraded Films

Alasdair Newson (1, 2) , Andrés Almansa (2) , Yann Gousseau (2) , Patrick Pérez (1)

1 Technicolor R & I [Cesson Sévigné]
2 LTCI - Laboratoire Traitement et Communication de l'Information

The film defect known as the line scratch is difficult to restore automatically due to the large number of false alarms present in scratch detection algorithms. In this paper, an algorithm for dealing with these false alarms is proposed. Validating true scratches, which is the approach generally proposed in the literature, is a difficult task since scratch characteristics are hard to determine, making tracking these defects problematic. Instead, we eliminate false alarms by analysing their compatibility with a global motion estimation. We compare our algorithm with two other scratch detection methods from the literature. Experiments show that our algorithm outperforms these two, and that the proposed temporal filtering greatly improves precision while maintaining high recall.

Mots clés: Film defects; line scratches; affine domi-nant motion; temporal filtering

Domaines: Traitement des images [eess.IV]

Alasdair Newson, Andrés Almansa, Yann Gousseau, Patrick Pérez. Temporal Filtering of Line Scratch Detections in Degraded Films. International Conference on Image Processing (ICIP), IEEE, Sep 2013, Melbourne, Australia. pp.4088-4092, ⟨10.1109/ICIP.2013.6738842⟩. ⟨hal-00927487⟩