A fast filter for real-time image processing

Abstract

Absrracr -In this paper, a new digital filter structure is developed for the implementation of two-dimensional (2-D) recursive filters for real-time image processing. The proposed structure has a short clock cycle time or a high data throughput rate, independent of the order of the filter. Parallelism and pipelining are the two features of the proposed filter structure that contribute to its high-speed performance. The filter can be implemented without multipliers. Using standard integrated circuits and memories, the new filter is capable of filtering images of size up to 512~ 512 pixels with a TV scan rate of 30 frames/s in real time. The effects of the finite precision arithmetic have been considered. Scaling and overflow problems are studied to give insight into the choice of a proper scaling factor, so that an adequate signal-to-noise ratio at the filter output can be obtained.

Systolic Realization of 2-D Digital Filters for Real-Time Image Processing

“…Resuming the previous sections we can observe, that for real-time image processing the Imla-structure has a lot of important advantages compared to other structures [2,4,5,6]:…”

“…However, it was impossible to formulate the problem in terms of scalar potentials if more complicated dielectrics had to be considered. In this paper we will derive two methods for analyzing such waveguide structures first by combination of the perturbation theory with the mode-matching technique and second by formulating the problems in terms of the transverse magnetic field components as used in [2,3]. In this paper we will derive two methods for analyzing such waveguide structures first by combination of the perturbation theory with the mode-matching technique and second by formulating the problems in terms of the transverse magnetic field components as used in [2,3].…”

Switched-current filter design for image processing systems

“…In order to calculate values of parameters of the prototype circuit, the equations (7), being for this example in the form We will illustrate the method of 2-D filter design by an example of a high-emphais image filter. The filter, described in [9], has the transfer function in the discrete domain with the numerator and denominator matrices An SC implementation of the high-emphasis filter is presented in [5]. In order to obtain an SI implementation, one can write the nodal equations of the gyrator-capacitor prototype circuit in the following form:…”