Line fitting based feature extraction for object recognition

Bing Li

doi:10.1117/12.2065442

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13 June 2014 Line fitting based feature extraction for object recognition

Bing Li

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Proceedings Volume 9090, Automatic Target Recognition XXIV; 90900K (2014) https://doi.org/10.1117/12.2065442
Event: SPIE Defense + Security, 2014, Baltimore, Maryland, United States

Abstract

Image feature extraction plays a significant role in image based pattern applications. In this paper, we propose a new approach to generate hierarchical features. This new approach applies line fitting to adaptively divide regions based upon the amount of information and creates line fitting features for each subsequent region. It overcomes the feature wasting drawback of the wavelet based approach and demonstrates high performance in real applications. For gray scale images, we propose a diffusion equation approach to map information-rich pixels (pixels near edges and ridge pixels) into high values, and pixels in homogeneous regions into small values near zero that form energy map images. After the energy map images are generated, we propose a line fitting approach to divide regions recursively and create features for each region simultaneously. This new feature extraction approach is similar to wavelet based hierarchical feature extraction in which high layer features represent global characteristics and low layer features represent local characteristics. However, the new approach uses line fitting to adaptively focus on information-rich regions so that we avoid the feature waste problems of the wavelet approach in homogeneous regions. Finally, the experiments for handwriting word recognition show that the new method provides higher performance than the regular handwriting word recognition approach.

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Bing Li "Line fitting based feature extraction for object recognition", Proc. SPIE 9090, Automatic Target Recognition XXIV, 90900K (13 June 2014); https://doi.org/10.1117/12.2065442

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