Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition
While splitting datasets, researchers assume that training set is exchangeable with test set and expect good classification performance. This assumption is invalid due to subject variability due to age differences. Classification models trained on activity data from one particular age group such as...
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | http://eprints.usm.my/60094/ http://eprints.usm.my/60094/1/ALI%20OLOW%20JIMALE%20-%20TESIS%20cut.pdf |
| _version_ | 1848884349404971008 |
|---|---|
| author | Jimale, Ali Olow |
| author_facet | Jimale, Ali Olow |
| author_sort | Jimale, Ali Olow |
| building | USM Institutional Repository |
| collection | Online Access |
| description | While splitting datasets, researchers assume that training set is exchangeable with test set and expect good classification performance. This assumption is invalid due to subject variability due to age differences. Classification models trained on activity data from one particular age group such as adults cannot generalize to activity data collected from a different age group such as elderly. Subject variability in the context of age is a valid problem that degrades the performance of activity recognition, but remains unexplored. Existing studies that investigated subject variability in activity recognition overlooked this problem and only focused on contextual subject variability, and intra-subject variability. This study investigates the effects of subject variability on the performance of sensor-based activity recognition. Elderly and adult datasets were used to evaluate the assessment techniques. Experiments on adult dataset only, experiments on elderly dataset only, and experiments on adult (as training) and elderly (as test) datasets were conducted using machine learning and deep learning. The results show a significant performance drop in activity recognition on different subjects with different age groups. On average, the drop in recognition accuracy is 9.75% and 12% for machine learning and deep learning models respectively. Conditional Generative Adversarial Network (CGAN) is an ideal solution to address subject variability. |
| first_indexed | 2025-11-15T19:05:17Z |
| format | Thesis |
| id | usm-60094 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T19:05:17Z |
| publishDate | 2023 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-600942024-03-11T02:19:26Z http://eprints.usm.my/60094/ Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition Jimale, Ali Olow QA75.5-76.95 Electronic computers. Computer science While splitting datasets, researchers assume that training set is exchangeable with test set and expect good classification performance. This assumption is invalid due to subject variability due to age differences. Classification models trained on activity data from one particular age group such as adults cannot generalize to activity data collected from a different age group such as elderly. Subject variability in the context of age is a valid problem that degrades the performance of activity recognition, but remains unexplored. Existing studies that investigated subject variability in activity recognition overlooked this problem and only focused on contextual subject variability, and intra-subject variability. This study investigates the effects of subject variability on the performance of sensor-based activity recognition. Elderly and adult datasets were used to evaluate the assessment techniques. Experiments on adult dataset only, experiments on elderly dataset only, and experiments on adult (as training) and elderly (as test) datasets were conducted using machine learning and deep learning. The results show a significant performance drop in activity recognition on different subjects with different age groups. On average, the drop in recognition accuracy is 9.75% and 12% for machine learning and deep learning models respectively. Conditional Generative Adversarial Network (CGAN) is an ideal solution to address subject variability. 2023-07 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/60094/1/ALI%20OLOW%20JIMALE%20-%20TESIS%20cut.pdf Jimale, Ali Olow (2023) Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition. PhD thesis, Universiti Sains Malaysia. |
| spellingShingle | QA75.5-76.95 Electronic computers. Computer science Jimale, Ali Olow Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title | Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title_full | Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title_fullStr | Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title_full_unstemmed | Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title_short | Enhanced Conditional Generative Adversarial Network For Handling Subject Variability In Human Activity Recognition |
| title_sort | enhanced conditional generative adversarial network for handling subject variability in human activity recognition |
| topic | QA75.5-76.95 Electronic computers. Computer science |
| url | http://eprints.usm.my/60094/ http://eprints.usm.my/60094/1/ALI%20OLOW%20JIMALE%20-%20TESIS%20cut.pdf |