An Efficient VLSI Architecture for Bi-Cubic Interpolation using Carry Skip Adder

Rao. C. R

Department of Electrical Engineering, Maulana Abul Kalam Azad university of Technology, Kolkata, West Bengal, India

Mandal S. K

Department of Electrical Engineering, National Institute of Technical Teachers' Training & Research (NITTTR), Kolkata, West Bengal, India.

ABSTRACT

In any signal processing system, signal distortion can occur. A compensation scheme would adjust the captured signal to correct for any deviations and ensure accurate signal transmission and preservation. A compensation scheme is used to correct such deviations for mostly linear is used to enhance the quality of reconstructed signal suitable for high-quality super-resolution techniques. This technique is applicable for multidimensional signal processing such as image processing. Except for the resolution of the acquired images, the extracting of colour information is greatly affected by the number of pixels. This scheme enhances the correlation of interpolated pixels and their immediate neighbouring pixels. This research aims to develop a super-resolution demosaicking (SRD) technique to reconstruct high-resolution, full-colour images from samples of the same previously seen (in-painted) image without a sophisticated, time-consuming training process. Hardware-oriented colour demosaicking methods, which give importance to green colour pixels, have thus enhanced the quality of the restored image. A Boundary Mirror and Detector mechanism also considered here for improving the pixel quality up to the boundaries. Three interpolators were economized by using a method called hardware sharing. The present Bi-Cubic interpolation technique has been designed as part of our overall effort to enhance and advance the SRD approach toward better performance and broader acceptance. This had been implemented by VLSI architecture and VHDL, whereas MATLAB had executed the image conversion and de-conversion methods. Comparison in the evaluation of results was done based on PSNR and SSIM values, followed by the analysis of the output results after the synthesis process using a Xilinx Vivado ZYNQ-7-ZC702 FPGA.

Keywords:

Signal processing system, Signal distortion, correlation, Interpolation, Demosaicking, Bi-Cubic interpolation, Colour Images, Super resolution, VLSI architecture, VHDL, MATLAB, PSNR and SSIM.