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...

This paper presents an approach for identifying recaptured image based on DCT coefficients. The low frequency of an image mainly reflect such information as texture and profile details. The difference between real live face images and recaptured images can be described by the low frequency of DCT coefficients. Characterized by the features of the simple and low complexity, DCT Transformation ca...

The algorithm represents the DCT coefficients to concentrate signal energy and proposes combination and dictator to eliminate the correlation in the same level subband for encoding the DCT-based images. This work adopts DCT and modifies the SPIHT algorithm to encode DCT coefficients. The proposed algorithm also provides the enhancement function in low bit rate in order to improve the perceptual...