Walking

Upstairs

Downstairs

Sitting

Standing

Laying

Vertical Construction Model for Human Activity Recognition

Sensor Layer

(Accelerometer, Gyroscope, HR Monitor)

Preprocessing

(Segmentation, Normalization)

Feature Extraction

(Statistical & Deep Features)

Fusion Module

(Unimodal / Multimodal)

Classification Model

(CNN-LSTM, ResNet50, MobileNetV2)