Offline Language-free Writer Identification Based on Speeded-up Robust Features

This article proposes offline language-free writer identification based on speeded-up robust features (SURF), going through training, enrollment, and identification stages. In all stages, an isotropic Boxfilter is first used to segment the handwritten text image into word regions (WRs). Then, the SURFdescriptors (SUDs) of word region and the corresponding scales and orientations (SOs) are extracted. In the training stage, an SUD codebank is constructed by clustering the SUDs of training samples. Inthe enrollment stage, the SUDs of the input handwriting adopted to form an SUD signature (SUDS) by looking up the SUD codebank and the SOs are utilized to generate a scale and orientation histogram (HSO). In the identification stage, the SUDS and HSO of the input handwriting are extracted andmatched with the enrolled ones for identification. Experimental results on eight public data sets demonstrate that the proposed method outperforms the state-of-the-art algorithms

کلیدواژه ها:

Speeded-up Robust Features Descriptors ، Codebank ، Scale Orientation ، ، Word Regions