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This paper presents camera based system which will help blind person for reading text patterns printed on hand held objects. This is the framework to assist visually impaired persons to read text patterns and convert it into the audio output. To obtain the object from the background and extract the text pattern from that object, the system first proposes the method that will capture the image from...
Peripheral pulse captured with the help of optical sensor placed on an appendage, is known as photoplethysmography (PPG). PPG can be recorded by using reflectance or transmittance type of probe. Transmittance type of probe is used only at the sites were tissue denseness is lower. While the reflectance type of probe is independent of tissue denseness, if it is operated at a higher intensity. The aim...
Detection of blood volume change in the skin by using Photoplethysmogram (PPG) sensor is based on the principle that hemoglobin in the blood absorbs infrared light than the other tissue. Favorable optical window is around 990nm range. The reflectance type photoplethysmographic sensor is designed using two different detectors. Objective is to compare the response of PPG sensor by using Light Dependent...
Coherence analysis can be detect for coordination of EEG rhythms between brain areas. It could not reflect the dynamic properties changing with time. Coherence analysis is a method developed on base of classic coherence analysis and signal's joint time-frequency representations in recent years. It was used to extract transient characteristics of interactions among brain areas. It describes the temporal,...
Measurement of blood volumetric changes in human body by photoplethysmographic sensors is used in present study. Objective is to measured different parameters that are heart rate, respiratory rate, BP. PPG signal is acquired by PPG sensor, microcontroller and RS 232. The acquired PPG signal is displayed in MATLAB. Frequency domain analysis of PPG signal shows a two peaks first at around 0.25 to 0...
Photoplethysmography (PPG) is the process of applying a light source and photo sensor to an appendage, such as a finger or a toe, and measuring the light that is reflected by the skin. At each contraction of the heart, blood is forced through the peripheral vessels producing engorgement of the vessels under the light source, there by modifying the amount of light reflected to the photo sensor. Arterial...
The main objective of forensic dentistry is to identify people based on their dental records, mainly as radiograph images. In this paper we attempt to present dental biometric system for preprocessing, segmentation and matching of dental image. Dental biometric system is used in forensic science, in which we need to match Postmortem (PM) radiographs with antemortem (AM) radiographs to determine the...
Blood pressure (BP) is one of the important vital signs that need to be monitored for personal healthcare. This paper describes the method developed by the authors to measure systolic blood pressure from pulse transit time (PTT) Pulse transit time is the time taken for the arterial pulse pressure wave to travel from the aortic valve to a peripheral site. It is usually measured from the R wave on the...
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