Digital Image Processing

B. SriLakshmi ¹, M. V. S. R. Kishore ², B. Hari Krishna ¹

Affiliations
1 Bomma Institute of Technology, AP, IN
2 Kishore is with Bomma Institute of Technology, AP, IN

Abstract

In this paper we propose a technique for software-implementation of an lifting with the goal of getting a customizable lifting DWT-core which can be used as a module in implementing a bigger system irrespective of ones choice of implementation platform. Here we have written the core processor Microblaze is designed in VHDL (VHSIC hardware description language), implemented using XILINX ISE 8.1 Design suite the algorithm is written in system C Language and tested in SPARTAN-3 FPGA kit by interfacing a test circuit with the PC using the RS232 cable. The test results are seen to be satisfactory. The area taken and the speed of the algorithm are also evaluated. It improves throughput 1.35 times greater than the previous design. The Previous design gives throughput upto 93.47MHz.This Proposed System gives the high throughput and it increases the computation speed. For this application it can be used in image processing applications.

Keywords

UART, VHDL, Softcore, System C Microblaze, Lifting.

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B. Hari Krishna ¹, G. Upender ², G. Malika ³

Affiliations
1 Sathyabama University, Chennai, IN
2 Department of Electronics and Communications, Khammam Institute of Technology and Sciences, Khammam, IN
3 Swarna Bharathi Institute of Science and Technology, JNTU, Hyderabad, IN

Abstract

Digital watermarking is one way to the users to protect the digital content from the hackers. By considering the stability of the low-frequency components in 1D-DWT (1-dimension discrete wavelet transform), a video watermarking scheme in wavelet domain is proposed in this paper. The watermark is embedded in the blocked low-frequency image by considering whole consecutive frames obtained from a video and we can obtain a low frequency image, which is the same size as the raw frame. The experimental results demonstrate that the watermarking method has strong robustness against some common attacks, such as compression of MPEG-2, noise attack, frame exchanging. The robustness of the proposed technique is calculated in terms of PSNR, as we consider more number of frames the robustness is increased which is shown in the results and discussion. The proposed scheme is less complex and has smaller calculation deal, so it can meet the real-time requirements.

Keywords

1D-DWT, Raw Frame, MPEG-2, PSNR.

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