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AI based pneumonia detection using adaptive contrast enhancement and data augmentation

This is an implimented project with the help of reference from original papers Radiologist-Level Pneumonia Detection on Chest X-Rays with Deep Learning and Pneumonia Detection in chest X-ray images using Convolutional Neural Networks and Transfer Learning.you can also check my project report here

Sample Images

Please Collect the data set from kaggle-Chest X-Ray Images (Pneumonia). The sample Image is shown below. Alt Text

Method

Images - > Preprocesing{data augumentation,Contrast ENhancement} ->Vgg16{Model}->classification results

Preprocessing:

a) Data augumentation

It includes image rotation,flipping and addtion of gaussian noise.The data set size is increased to good scale,the results are shown below. Alt Text

b) Contrast Enhancement

Gamma Contrast Enhancement: It is is a nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems. Mathematically explined by the following formula. Gaussian Contrast Enhancement: Its a Non-linear transformation function to enhance brightness and contrast. Brightness enhancement It is a linear trasnformation which adjust the brightness of the image based on the given gain value,after that the image also undergoes thresholding operation. Alt Text

Model and Hyperparameters:

Alt Text

Name Value
Batch size-training ` 128
Batch size-validation ` 128
Batch size-testing ` 8
Number of epochs ` 10
Learning Rate | 2e-4

Results:

The final classification results are shown in below table.For more information please check the my project report here Alt Text

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