Perceptual hashing has been broadly used in the literature to identify similar contents for
video copy detection. It has also been adopted to detect malicious manipulations for video …

... that is what learning is. You suddenly understand something you've un derstood all your
life, but in a new way. Various transforms have been widely used in diverse applications of …

This paper introduces a speech encryption approach, which is based on permutation of
speech segments using chaotic Baker map and substitution using masks in both time and …

Perceptual image hashing has mainly been used in the literature to authenticate images or
to identify similar contents for image copy detection. In this work, we investigate the …

Unified efficient computations of the discrete cosine transform (DCT), discrete sine transform
(DST), discrete Hartley transform (DHT), and their inverse transforms employing the time …

The authors mathematically analyze the drift of low-resolution images obtained from a
smaller IDCT of a subset of the DCT coefficients of the full-resolution images in motion …

This paper presents an efficient constant-time Gaussian filter which provides a high
accuracy at a low cost over a wide range of scale σ. It requires only 14 multiplications per …

Fast algorithms for computing various discrete cosine transforms and discrete sine
transforms in a sliding window are proposed. The algorithms are based on a recursive …

A common approach to signal or image processing using the discrete Fourier transform
(DFT) is to extract a portion of the signal by windowing, and then to form the DFT of the …

This paper presents an efficient constant-time algorithm for Gaussian filtering and also
Gaussian derivative filtering that provides a high approximate accuracy in a low …