Image compression is the reduction or elimination of redundancy in data representation in order to achieve reduction in storage and communication cost. For this we use the simple computational method, 2D-DCT, using two 1D-DCT performed on matrix of (8X8). The DCT is a technique that converts a signal from spatial domain to frequency domain. Here we first convert the image into minimum code unit...

In these days, multimedia data is transmitted and processed in compressed format. Due to the decoding procedure and filtering for edge detection, the feature extraction process of MPEG-7 Edge Histogram Descriptor is time-consuming as well as computationally expensive. To improve efficiency of compressed image retrieval, we propose a new edge histogram generation algorithm in DCT domain in this ...

The Dot Counting Test (DCT) offers a technique for malingering detection that is less transparent than the forced-choice testing that has received so much recent attention. The present study defined six dependent variables derived from DCT responses, and examined these variables in the context of differentiating simulators from non-simulators. Four groups of subjects were studied: normal contro...

A method for the rapid design of field programmable gate array (FPGA)-based discrete cosine transform (DCT) approximations is presented that can be used to control the coding gain, mean square error (MSE), quantization noise, hardware cost, and power consumption by optimizing the coefficient values and datapath wordlengths. Previous DCT design methods can only control the quality of the DCT app...

KEY TAKE HOME POINTS 1. The purpose of dry cow therapy is both therapeutic and prophylactic; selective DCT is aimed only at therapeutic aims 2. Cows that maintain persistent subclinical infections across the dry period are at greater risk of subclinical and clinical mastitis and reduced milk yield during the subsequent lactation 3. Few mastitis pathogens are resistant to most antimicrobials use...

The integer DCT (Int-DCT), which transforms an integer input to an integer output, is attracting many researchers' attention as an effective method for DCT based lossy / lossless unified coding. There are many reports relevant to the Int-DCT. Recently, we proposed an optimum word length allocation method based on the proposed SNR sensitivity. In this report, we confirm an effectiveness of the p...

In this paper we introduce the DCT-mod2 facial feature extraction technique which utilizes polynomial coefficients derived from 2-D DCT coefficients of spatially neighbouring blocks. We evaluate its robustness and performance against three popular feature sets for use in an identity verification system subject to illumination changes. Results on the multi-session VidTIMIT database suggest that ...

Abstract For many applications such as image transmission over channels with variable bandwidths and image display on devices at different resolution levels, image resizing is widely demanding. Recently, image resizing algorithms in the compressed domain have drawn a lot of attention to computation efficiency. In this paper, an efficient image resizing algorithm based on discrete cosine transfo...