Separable two-dimensional discrete Hartley transform

A Separable Two - Dimensional Discrete Hartley Transform Andrew

Bracewell has proposed the Discrete Hartley Transform (DHT) as a substitute for the Discrete Fourier Transform (DFT), particularly as a means of convolution (R. N. Bracewell, "Discrete Hartley transform," Journal of the Optical Society of Arnerica, vol. 73, pp. 1832-1835, 1983). Here we show that the most natural extension of the DHT to two dimensions fails to be separable in the two dimensions...

Color Image Authentication based on Two-Dimensional Separable Discrete Hartley Transform (CIA2D-SDHT)

*Department of Computer Science & Engineering Greater Kolkata College of Engineering & Management Baruipur, West Bengal, 743387, India ** Department of Computer Science & Engineering, University of Kalyani Kalyani, West Bengal, 741235, India ([email protected]; [email protected]) Abstract In this paper, a novel watermarking technique based on two-dimensional separable discrete Hartley tr...

Non Separable Two Dimensional Discrete Wavelet Transform for Image Signals

A Fragile Watermarking Based on Separable Discrete Hartley Transform for Color Image Authentication (fwsdhtcia)

In this paper, a fragile watermarking based on two-dimensional Separable Discrete Hartley Transform has been proposed for color image authentication (FWSDHTCIA). Two dimensional SDHT is applied on each 2 × 2 sub-image block of the carrier image in row major order and produces four frequency components in transform domain. Due to the high sensitivity of human eye on green channel, only one authe...

Discrete Hartley transform based multicarrier modulation

This paper presents a real-valued discrete multicamer modulation approach that is based on the use of the discrete Hartley transform (DHT) and its inverse (IDHT) to perform the modulation and demodulation operations. Since the DHT and IDHT definitions are identical, we can use the same hardware or program to implement the modulator and demodulator of the proposed multicarrier method. As compare...