A Shape Descriptor combining Logarithmic-scale Histogram of Radon Transform and Phase-only Correlation Function

Makoto Hasegawa (1) , Salvatore Tabbone (1)

1 QGAR - Querying Graphics through Analysis and Recognition

A shape descriptor combining the histogram of the Radon transform, the logarithmic-scale histogram, and the phase-only correlation function is proposed. Applying a logarithmic-scale to the Radon transform, the shape scaling and rotation become two-dimensional translations in our descriptor without any normalization. The geometric invariance to translation, when we match two shapes, are kept using the phase-only correlation function. In addition, we can determine with this function the rotation angle and the scale parameter between two shapes. Our descriptor is robust to shape occlusion and noise also.

Mots clés: radon transform; logarithmic scale; histogram; phase-only correlation

Domaines: Traitement du texte et du document

Makoto Hasegawa, Salvatore Tabbone. A Shape Descriptor combining Logarithmic-scale Histogram of Radon Transform and Phase-only Correlation Function. 10th International Conference on Document Analysis and Recognition - ICDAR 2011, Sep 2011, Pekin, China. pp.182-186, ⟨10.1109/ICDAR.2011.45⟩. ⟨hal-00657641⟩