G.Neehiraka,S.Jaya Sri 03 06 The identification of lung cancer at the early stage is very demanding and difficult task due to construction of the cell The cancer grows in the body when cancerous cells start to develop uncontrollably The image processing plays vital role in the prediction of lung cancer at early stage which is also helpful in treatment to avoid the lung cancer This proposed system is developed to detect lung cancer at early stage with the help of image processing techniques and artificial neural network classifier to design computer based diagnosis system In this system during the preprocessing step several image enhancing techniques masks are applied using morphological operations and thresholding technique which eliminates background and surrounding tissue Region of interest ROI is calculated using region based segmentation algorithm Circle fit algorithm is used to extract the desired nodule Radius Mean Intensity Area Euler Number and ECD features are extracted in feature extracting step Finally Back propagation algorithm is used to train Artificial Neural Network ANN in categorization stagev Copyright (c) Journal of Science Engineering Technology and Management Science. All rights reserved 2026