Search

Background: Automatic human emotion recognition system is an active area of research due to its wide applications in the field of Human Computer Interaction(HCI) systems, driver fatigue monitoring systems, surveillance systems, human assistance systems, smile detectors etc. Objective: The study presents a fuzzy based approach to extract facial features from input image and builds different classification models to classify the image into two emotion classes i.e. happy and neutral. The system has potential implications in the field of smile detection systems, customer experience analysis and patient monitoring systems. Methods: The proposed system determines the dimensional attributes (l-attribute and w-attribute) of mouth region extracted from the facial image using viola-jones algortithm. The feature set is generated by using a total of 136 images from JAFFE, NimStim and MUG dataset. The differentiating power of the attribures is then evaluated using five different classification models. Results: The accuracy, precision and recall is determined for each classification model. The results show good accuracy of 70% for the grayscale JAFFE and NimStim databases and 95% for the coloured MUG database. Conclusion: The mouth features calculated in the study are based on the geometric coordinates which eliminates the possibility of false distance measurements due to presence of noise or shadows.

Spectro-temporal features of speech are the basis of phonological comprehension and production in the brain. Thus, these features provide a relevant framework to study speech and language development in children. In this paper, we present a novel framework to study the statistics of spectro-temporal features of speech that are encoded at different timescales. These timescales correspond to different linguistic units such as prosodic or syllabic components. The framework is tested on a speech corpus consisting of 169 speech samples. The paper demonstrates usage of the proposed framework in finding milestones of speech development in children. The results indicate the presence of more number of spectro-temporal features encoded at short timescales in adults as compared to children. However, no significant difference is observed in the spectro-temporal features encoded at long timescales between these groups. The proposed framework is also used in studying the speech impairments of children and adults with mild to moderate intellectual disabilities. The results reveal the absence of some spectro-temporal features encoded at both the timescales and their absence is more prominent in shorter timescales. The suggested framework can be used for studying speech development and impairment in different disorders.

This study presents a geometric feature based automatic facial expression recognition system. The proposed system utilises the facial landmark points to determine the relative distances between the facial features in order to capture deformities caused by the movement of facial muscles due to different expressions. Three feature sets are generated by using landmark coordinates, relative distances between the facial points and a combination of both. Discriminating power of each feature set is determined by training different classification models for classifying an image into six basic emotions or neutral state. The proposed system is validated on two publically available facial expression databases. Experimental results show good accuracy of 95.5% for MUG database on the combined features by using ensemble neural network.

Development of speech is very crucial for good quality of life. People with learning disabilities face challenges in communication due to deficiencies in speech production and require interventions in terms of training and rehabilitation to become less dependent. For providing specific trainings, it will be valuable to know the exact nature of these deficiencies through acoustic analysis. This study investigated fundamental frequency and intensity in a speech of 95 subjects including 39 normal developing children, 20 adults and 36 subjects with mild to moderate intellectual disability (mental retardation). The results show significant differences in these acoustic measurements. This present study also developed a model that classify the normal developing and intellectually disable groups based on these acoustic features. The findings suggest that acoustic cues such as fundamental frequency along with intensity play a significant role in classifying the groups. It was shown that classifiers with good accuracy can be built based on these parameters which indicate differentiating capabilities of the said features. Such attempts to build classification models can also aid in early diagnosis of intellectual or learning disabilities.

Sharing medical data with numerous stakeholders for varied purposes is a perplexing problem facing healthcare systems throughout the world. All this needs to be done, whilst ensuring patient and health data privacy and data integrity. Through this paper, an attempt has been made to present a novel distributed digital health record management system. The blockchain framework has been built using the tools provided by hyper ledger, an open source project. This system empowers patients with a comprehensive, secure, immutable, and easily accessible digital record of their health. Also, this information is available across multiple practitioners and healthcare providers throughout the world. This system can therefore empower the emergence of health data economics, empowering researchers with the health data and giving patients an opportunity to share their health data without losing anonymity. The purpose of this paper is to introduce a prototype of a health data management system utilising blockchain.

This paper reviews the technology used in Speech-to-Speech Translation that is the phrases spoken in one language are immediately spoken in another language by the device. Speech-to-Speech Translation is a three step software process which includes Automatic speech Recognition, Machine Translation and voice synthesis. This paper includes the major speech translation projects using different approaches for speech recognition, translation and text to speech synthesis highlighting the major pros and cons for the approach being used.

In speech development research, it's important to know how speech acoustic features vary as a function of age and the age when the variability and magnitude of acoustic features start to exhibit adult-like patterns. During the first few years of life, a child's speech changes from the cries and babbles of an infant to adult-like words and phrases of a young child. A number of acoustic studies observed that, adult's speech compared to children's speech, exhibits lower pitch and formant frequencies, shorter segmental durations, and lesser temporal and spectral variability. In this research we extracted acoustic, spectral and temporal features of a speech signal and then classify these features to predict the age of the subjects using different classification techniques. The feature vector comprised of fundamental frequency, formants, lpc coefficients and segmental duration. This study investigated the developmental patterns and the varying trends observed in speech acoustics with advancement in age and gender. The investigation then contributed in predicting the age of the speakers by analyzing these extracted features using various classification techniques and the result revealed maximum recognition rate by using neuro-fuzzy classifiers. This prediction of age may further help us in analyzing the speech samples in order to predict early speech disorders or language delay in children with neuro-developmental disorder.

An ad hoc network is a group of wireless mobile computers or nodes in which individual nodes cooperate by forwarding packets for each other to allow nodes to communicate beyond direct wireless transmission range. In this paper I presented the design and performance evaluation of a new on demand ad hoc routing protocol, called SWARM. SWARM used mechanisms of swarm intelligence to based select good routes to destinations. SWARM was Scalable, Adaptable, Autonomous and have good Fault tolerance capability. This paper presents the simulated performance comparison of SWARM with AODV and DSR in different CBR traffic flow. Performance evaluation of AODV, DSR and SWARM was evaluated on packet delivery ratio, network throughput, end-to-end latency and packet transmission rate.