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Multiplicative speckle noise is always present in synthetic aperture sonar (SAS) images, which is due to the coherent nature of scattering phenomena. Many methods that reduce speckle noise while preserving texture and detail have been developed for SAR and presented in the literature. In this paper, some speckle reduction techniques from SAR images are adapted and applied to SAS high resolution images. A comparison of different methods is performed and new improvements for traditional methods are introduced, considering image quality and better Speckle Suppression Index (SSI). These methods include mean adaptive filter, anisotropic diffusion, Lee filter, Kuan filter and a wavelet-based methodology, which are applied to real SAS high resolution (HR) data collected by NATO Underwater Research Center (NURC) during the COLOSSUS measurement campaign.

A detailed study of device characteristics and parameter variations of organic transistors on foil leads to the conclusion that design of p-type only digital circuits needs to focus on optimal yield, rather than on speed. From this perspective, subsequent generations of organic RFID tags have been realized, by increasing complexity (from 64 bit to 128 bit code generators), by adding functionality (Manchester encoding, anti-collision protocols), and by increasing data rate of the generated ID code (from 752 bits per second towards 50 kbit per second). As such, each of the requirements towards EPC compatible organic RFID tags is shown independently in code generators on foil, but not yet in a single RFID tag.