Deep Learning And Its Applications To Retinal Vessel Segmentation And Motion Brain Imagery Classification

Deep learning-based techniques are emerging in various fields and can provide competitive outcomes.This study deals with the implementation of deep learning onto two domains,including retinal vessel segmentation and motion brain imagery classification.Retinal blood vessels,the diagnostic bio-marker of ophthalmologic and diabetic retinopathy,utilize thick and thin vessels for diagnostic and monitoring purposes.The existing deep learning methods attempt to segment the retinal vessels using a unified loss function.However,a difference in spatial features of thick and thin vessels and a biased distribution creates an imbalanced thickness,rendering the unified loss function to be useful only for thick vessels.To address this challenge,a patch-based generative adversarial network-based technique is proposed which iteratively learns both thick and thin vessels in fundoscopic images.It introduces an additional loss function that allows the generator network to learn thin and thick vessels,while the discriminator network assists in segmenting out both vessels as a combined objective function.Compared with state-of-the-art techniques,the proposed model demonstrates the enhanced accuracy,sensitivity,specificity,and area under the receiver operating characteristic curves on STARE,DRIVE,and CHASEDB1 datasets.Electroencephalography(EEG)is a method of the brain–computer interface(BCI)that measures brain activities.EEG is a method of(non-)invasive recording of the electrical activity of the brain.This can be used to build BCIs.From the last decade,EEG has grasped researchers’ attention to distinguish human activities.However,temporal information has rarely been retained to incorporate temporal information for multi-class(more than two classes)motor imagery classification.This research proposes a long-short-term-memory-based deep learning model to learn the hidden sequential patterns.Two types of features are used to feed the proposed model,including Fourier Transform Energy Maps(FTEMs)and Common Spatial Patterns(CSPs)filters.Multiple experiments have been conducted on a publicly available dataset.Extraction of spatial and spectro-temporal features using CSP filters and FTEM allow the sequence-to-sequence based proposed model to learn the hidden sequential features.The proposed method is trained,evaluated,and optimized for a publicly available benchmark data set and resulted in 0.81 mean kappa value.Obtained results depict the model robustness for the artifa cts and suitable for real-life applications with comparable classification accuracy.