Spatial Modulation is a new technique for Multiple-Input-Multiple Output (MIMO) systems that reduces the complexity of the transceiver and provides high data rate. It uses one or more selected antennas to transmit by utilizing antenna indices as a source of information. Maximum likelihood detector is used to detect the transmitted antenna indices and the transmitted symbol. If either the transm...

The paper presents improved content based image retrieval (CBIR) techniques based on multilevel Block truncation coding using multiple threshold values. Block truncation Coding based features is one of the CBIR methods proposed using color features of image. The approach basically considers red, green and blue planes of image together to compute feature vector. The color averaging methods used ...

A compression scheme is presented that has been designed to e ciently code light elds. Based on video compression techniques, the light eld image array is divided into image blocks. Di erent block-coding modes have been devised to exploit redundancy between images over a wide range of target bit rates. Prediction from multiple reference images further enhance coding e ciency. Rate-constrained m...

The Lapped Orthogonal Transform (LOT) [1][3] is a new transform for block image coding. It has basis functions that overlap adjacent blocks and decay smoothly to zero, and so it can reduce the blocking effect to very low levels, without any data overhead. In t'his paper we show that a quasi-optimal LOT can be computed with an algorithm based on the discrete cosine transform (DCT), with only 30 ...

The capacity of channels with block memory is investigated. It is shown that, when modeled as a game theoretic problem, the optimum coding and noise distributions when block memory is permitted are independent from symbol to symbol within a block.

A predictive image compression scheme that combines the advantages of vector quantization and moment preserving block truncation coding is introduced in this paper. To exploit the similarities among neighboring image blocks, the block prediction technique is employed in this scheme. If a similar compressed image block can be found in the neighborhood of current processing block, it is taken to ...