IEEE Trans Image Process - Fast localization of the optic disc using projection of image features.

Tópicos

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Resumo

Optic Disc (OD) localization is an important pre-processing step that significantly simplifies subsequent segmentation of the OD and other retinal structures. Current OD localization techniques suffer from impractically-high computation times (few minutes per image). In this work, we present a fast technique that requires less than a second to localize the OD. The technique is based upon obtaining two projections of certain image features that encode the x- and y- coordinates of the OD. The resulting 1-D projections are then searched to determine the location of the OD. This avoids searching the 2-D image space and, thus, enhances the speed of the OD localization process. Image features such as retinal vessels orientation and the OD brightness are used in the current method. Four publicly-available databases, including STARE and DRIVE, are used to evaluate the proposed technique. The OD was successfully located in 330 images out of 340 images (97%) with an average computation time of 0.65 s.

Resumo Limpo

optic disc od local import preprocess step signific simplifi subsequ segment od retin structur current od local techniqu suffer impracticallyhigh comput time minut per imag work present fast techniqu requir less second local od techniqu base upon obtain two project certain imag featur encod x y coordin od result d project search determin locat od avoid search d imag space thus enhanc speed od local process imag featur retin vessel orient od bright use current method four publiclyavail databas includ stare drive use evalu propos techniqu od success locat imag imag averag comput time s

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