IOSR journal of VLSI and Signal Processing 

About: IOSR journal of VLSI and Signal Processing is an academic journal. The journal publishes majorly in the area(s): CMOS & Adder. Over the lifetime, 377 publications have been published receiving 664 citations.

Agricultural Plant Leaf Disease Detection and Diagnosis Using Image Processing Based on Morphological Feature Extraction

Abstract: Leaf spots can be indicative of crop diseases, where leaf batches (spots) are usually examined and subjected to expert opinion. In our proposed system, we are going to develop an integrated image processing system to help automated inspection of these leaf batches and helps identify the disease type. Conventional Expert systems mainly those which used to diagnose the disease in agriculture domain depends only on textual input. Usually abnormalities for a given crop are manifested as symptoms on various plant parts. To enable an expert system to produce correct results, end user must be capable of mapping what they see in a form of abnormal symptoms to answer to questions asked by that expert system. This mapping may be inconsistent if a full understanding of the abnormalities does not exist. The proposed system consists of four stages; the first is the enhancement, which includes HIS transformation, histogram analysis, and intensity adjustment. The second stage is segmentation, which includes adaptation of fuzzy c-means algorithm. Feature extraction is the third stage, which deals with three features, namely color size and shape of spot. The fourth stage is classification, which comprises back propagation based neural networks.

Zero crossing rate and Energy of the Speech Signal of Devanagari Script

Abstract: In speech analysis, the voiced-unvoiced decision is usually performed in extracting the information from the speech signals. In this paper, we performed two methods to separate the voicedunvoiced parts of speech from a speech signal. These are zero crossing rate (ZCR) and energy. In here, we evaluated the results by dividing the speech sample into some segments and used the zero crossing rate and energy calculations to separate the voiced and unvoiced parts of speech. The results suggest that zero crossing rates are low for voiced part and high for unvoiced part where as the energy is high for voiced part and low for unvoiced part. Therefore, these methods are proved more effective in separation of voiced and unvoiced speech

FPGA Implementation for Image Processing Algorithms Using Xilinx System Generator

Abstract: The paper presents information about FPGA implementation for various Image Processing Algorithms using the most efficient tool called Xilinx System Generator (XSG) for Matlab. System Generator is a DSP design tool from Xilinx that enables the use of the Math Works model-based Simulink design environment for FPGA design. In this paper various morphological and intensity image processing algorithms for negatives, image enhancement, threshold,, contrast stretching, Edge detection, boundary extraction for grayscale and color images are explored. Use of Xilinx system generator for image processing effectively reduces intricacy in structural design also provides additional feature for hardware co-simulation

Power Optimization Techniques for Sequential Elements Using Pulse Triggered Flip-Flops with SVL Logic

Abstract: Flip-flops are the major storage elements in all SOC's of digital design. They accommodate most of the power that has been applied to the chip. Flip-flop is one of the most power consumption components. It is important to reduce the power dissipation in both clock distribution networks and flip-flops. The power delay is mainly due to the clock delays. The delay of the flip-flops should be minimized for efficient implementation. The concept of this project is to reduce the power consumption and to increase the speed and functionality of the chip. This project moves around in replacing conventional master-slave based flip flop to a pulse triggered flip flop which acts as a tribute alternate for low power applications. Initially in the critical path the pulse generation controls logic along with SVL function. A simple transistor SVL design is used to reduce the circuit complexity. In this scheme transistor sizes and pulse generation circuit can be further reduce for power saving. Here UMC CMOS 180nm technology is use in SPICE tool to design the proposed structure. This would bring up the result in power saving approximately to 38.4%. Index Terms-Flip-flop, low power,svl.

A Image analysis System to Detect Skin Diseases

Abstract: Skin diseases rate has been increasing for past few decades. Psoriasis is chronic inflammatory skin disease which affects more thgan 3% of population. One of the risk factor in skin cancer is unprotected exposer to UV radiation, which causes various skin diseases. For early diagnosis of skin cancer, psoriasis and dermatophytosis and increases chance for cure significantly. Therefore proposed system used for early prevention and detection named a Image analysis system to detects skin diseases. The image analysis technique where user will able to take skin images of different mole type or rashes type. System will process and analyse the images, which provide notification to user you need medical help. This system provides automatic skin diseases prevention and detection.)