Transmission of block-coded images through error-prone radio mobile channel often results in lost blocks. Error concealment (EC) techniques exploit inherent redundancy and reduce visual artifacts through post-processing at the decoder side. In this paper, we propose an efficient quantization index modulation (QIM)-based data hiding scheme using dual-tree complex wavelet transform (DTCWT) for th...

PURPOSE This study evaluated the depth of cure of resin composite cured by light through a translucent fiber post. MATERIALS AND METHODS The opaque plastic tubes in various lengths of 2, 4, 6, 8, 10, 12, 14 mm. were filled with resin composite in which two different translucent fiber posts were inserted into the center and photo-polymerized for 40 seconds. The degree of conversion of the cure...

Abstract— This paper proposes an image compression scheme using a personalized storage Discrete Wavelet Transform (DWT). In image compression schemes based on DWT, the module that generates these wavelet coefficients is sequentially attached to some encoding bitplanes. As the level of DWT decomposition increases the quantity of bits required to represent the wavelet coefficients is increased. A...

The focused signal obtained by the time-reversal or cross-correlation techniques of ultrasonic guided waves in plates changes when medium is subject to strain, which can be used monitor strain level. In this paper, sensitivity cross-correlated signals enhanced a post-processing filtering procedure aiming preserve only strain-sensitive spectrum components. Two different strategies were adopted, ...