In this paper, an algorithm for image coding based on a sparse 3-dimensional Discrete Cosine Transform (3D DCT) is studied. The algorithm is essentially a method for achieving a sufficiently sparse representation using 3D DCT. The experimental results obtained by the algorithm are compared to the 2D DCT (used in JPEG standard) and wavelet db9/7 (used in JPEG2000 standard). It is experimentally ...

Keywords: Biorthogonal transform Image compression JPEG algorithm All phase biorthogonal transform (APBT) Dual biorthogonal basis vectors Walsh transform (WT) Discrete cosine transform (DCT) Inverse discrete cosine transform (IDCT) Peak signal to noise ratio (PSNR) a b s t r a c t This paper proposes new concepts of the all phase biorthogonal transform (APBT) and the dual biorthogonal basis vec...

We present an implementation of the PACO-DCT inpainting algorithm. This method is based on maximizing likelihood image patches in terms their DCT coefficients, while requiring consensus overlapping patches. The resulting problem solved as instance PACO framework.

Transmitting images over an Orthogonal Frequency Division Multiplexing Access (OFDMA) system poses a significant challenge. The process entails sending substantial amount of data, which consumes bandwidth. Consequently, compressing the transmitted image becomes essential to reduce required aim this paper is examine and analyse wireless transmission compressed via Discrete Cosine Transform (DCT-...

Convolutional neural networks (CNNs) learn filters in order to capture local correlation patterns feature space. We propose these as combinations of preset spectral defined by the Discrete Cosine Transform (DCT). Our proposed DCT-based harmonic blocks replace conventional convolutional layers produce partially or fully versions new existing CNN architectures. Using DCT energy compaction propert...

Face is a multidimensional intricate structure that demands good computing technique for recalling it. This paper proposes a new diagonally assisted face recognition technique using Discrete Cosine Transform (DCT). Proposed work divides an image into matrix to apply DCT. Working scheme i.e. DA-DCT selects diagonal coefficient to retain low, moderate and high frequency coefficients for each bloc...

In this paper radix-2 algorithms for computation of type-II discrete cosine transform (DCT) and discrete sine transform (DST) of length N = 2 (n ≥ 2) are presented. The DCT/DST can be computed from two DCT/DST sequences, each of length N/2. The odd-indexed output components of DCT/DST can be realized using simple recursive relations. The proposed algorithms require a reduced number of arithmeti...