Skip to content

Sociedade Brasileira de Telecomunicações


A New Deblurring Algorithm for Textual Document Images

Documents digitalized by portable cameras or flatbed scanners may exhibit some blurred areas. Most deblurring algorithms are hard to implement and slow. Of...

SBrT 2010


Matrix Expansions for Computing the Discrete Hartley Transform

A new fast algorithm for computing the discrete Hartley transform (DHT) is presented, which is based on the expansion of the transform matrix. The algorith...

SBrT 2010


Removing Highlighting in Paper Documents

Very often interested readers highlight documents with felt pens. Such marking may be seen as personal and physically “damaging” the original document, thu...

SBrT 2010


Analysing on the Quality of Head Tomographic Images with Power Intensity Variation

Tomography is a non-invasive exam technique that provides a great amount of visual information of virtually inaccessible areas of the body. This paper anal...

SBrT 2010


Blind Source Separation in Polarization Division Multiplexed Optical Systems

Polarization division multiplexing systems is a promising technique, able to double the capacity of next generation optical communication systems. However,...

SBrT 2010