Wavelet-based blotch detection in old movies

Ammar-Badri, H.; Benazza-Benyahia, Amel

doi:10.1109/ipta.2008.4743752

2008 First Workshops on Image Processing Theory, Tools and Applications 2008

DOI: 10.1109/ipta.2008.4743752

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Wavelet-based blotch detection in old movies

H. Ammar-Badri¹,

Amel Benazza-Benyahia²

Abstract: In this paper, we are interested in detecting blotches in old movies. The novelty of our approach is twofold. Firstly, we study the pertinency of operating the detection in the wavelet transform domain. Secondly, we propose to resort to statistical outlier test in order to localize the underlying artifacts.

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Blotch Detection Based on Texture Matching and Adaptive Multi-threshold

Wei

Zhang

Hao

et al. 2009

2009 Fifth International Conference on Image and Graphics

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Blotch is a typical artifact in old films and the detection of them is an important step in film restoration. The existing simplified rank-ordered difference detector achieves higher detection rates by reducing the value of threshold. However, the corresponding higher number of false alarms is undesirable. To maximize the ratio between correct detections and false alarms, this paper proposes an improved blotch detector based on adaptive multithreshold. According to different objects of blotches, the proposed detector can achieve the most appropriate threshold by convergence confinement. Meanwhile, texture matching is introduced to avoid the possible deviation caused by motion vector estimation in the regions with blotches. Performance evaluation is taken to the image sequences with both real blotches and artificially corrupted ones. The experimental results indicate higher correct detection rates and fewer false alarms simultaneously.

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Blotch Detection Based on Texture Matching and Adaptive Multi-threshold

Wei

Zhang

Hao

et al. 2009

2009 Fifth International Conference on Image and Graphics

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A novel spatio-temporal method for blotch detection in the wavelet transform domain

Ammar-Badri¹,

Benazza-Benyahia²

2009

2009 3rd International Conference on Signals, Circuits and Systems (SCS)

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