Research and Parameter Optimization of the Infrared Sensor for Eye Track

Życzkowski, M.; Szustakowski, Mieczysław; Różanowski, K.; Murawski, K.; Karol, Mateusz; Markowski, Piotr

doi:10.12693/aphyspola.122.942

Cited by 7 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The parameters of the IR LEDs were measured by the technique described in [14]. The correlation between the measured width of the marker and the measured gas (CO 2 ) pressure was used for pressure measurement.…”

Section: Construction Of the Video-manometermentioning

confidence: 99%

New Vision Sensor to Measure Gas Pressure

Murawski

2015

Measurement Science Review

View full text Add to dashboard Cite

The paper presents the construction and operation of a video sensor developed for video-manometer. In the publication the use of video-manometer for measuring gas pressure is presented. A characteristic feature of the device is pressure measurement based on diaphragm deformation and digital image processing. Presented measuring technique eliminates restrictions in the construction of the measuring apparatus arising from non-linear nature of diaphragm deformation. It also allows performing measurements of gas pressure, also of explosive gas, providing galvanic isolation between the factor measured and the measuring device. The paper presents the results of video-manometer calibration and measurements taken during the laboratory tests. It has been shown that the developed video-manometer, that is equipped with a flat silicone diaphragm, allows measuring the gas pressure in the range of 0 -100 mbar with an error less than 2 %. In the experiments the CO2 pressure was measured.

show abstract

Section: Construction Of the Video-manometermentioning

confidence: 99%

New Vision Sensor to Measure Gas Pressure

Murawski

2015

Measurement Science Review

View full text Add to dashboard Cite

show abstract

“…The authors' experience in the design of microsensory measurement solutions and psychophysiological signals forms the basis of this research [1][2][3][4][5][6]. Their research focuses on the development of non-contact sensors allowing for a continuous analysis of fatigue under changing conditions (drivers, engine drivers, crane operators) or even extreme environment (typical of emergency rescue services, soldiers, commercial and military pilots).…”

Section: Introductionmentioning

confidence: 99%

Estimation of operators’ fatigue using optical methods for determination of pupil activity

Różanowski

Bernat

Kamińska

2015

Int J Occup Med Environ Health

View full text Add to dashboard Cite

Objectives: The purpose of this study was to develop and initially validate an objective, yet quick, method for assessment of human fatigue. This aim can be achieved by the use of an optical, non-contact method of analysis of pupil activity. The study involved 2 phenomena typical for the behavior of the human pupil: pupillary reflex and pupillary movements. The 1st phenomenon is related to the pupillary light reflex (PLR), which presents the results of physiological adaptation mechanisms of the human eye. The pupillary unrest index (PUI) is an additional parameter referring to the tendency for instability of the pupil. Material and Methods: Indicators of these 2 mechanisms were assessed under the same experimental laboratory conditions. Assessment was conducted on a group of volunteers (N = 10) during 4 controlled series of measurements performed at night. Pupillary reflex parameters associated with PLR and pupillary unrest index (PUI) were recorded using F²D Fit-For-Duty, a commercially available system made by AMTech Pupilknowlogy GmbH. Baseline pupil diameter, oscillations, reflex latency, maximum reaction time, pupil constriction time, pupil dilation time, and constriction amplitude were recorded. Results: As a result of the study, we were able to demonstrate correlation and confirm the usefulness of PLR and PST methods in the assessment of sleep deprivation. Parameters of PLR that may indicate human fatigue were identified. The effect of light impulse sequences on the dynamics of pupillary reflex and the relationship between PUI (pupillary unrest index) measurement duration and sleepiness assessment validity, were assessed. Conclusions: The results of the pilot studies were sufficient to develop minimum requirements for a PLR sensor that would be capable of estimating the level of fatigue with accuracy of a PUI method, but at a 5 times faster rate.

show abstract

“…These include: acquisition time, sensitivity, image resolution, fps, etc. The resulting system has been tested in terms of user safety; the results are included in[7].3. Software controlling sensor parameters and image acquisition The main task of the software controlling the sensor was to make image acquisition and image analysis as well as allowing the changing of illuminator parameters.…”

mentioning

confidence: 99%

An Infrared Sensor for Monitoring Meibomian Gland Dysfunction

et al. 2013

Self Cite

View full text Add to dashboard Cite

Meibomian gland dysfunction is one of the most common eye disorders observed in clinical practice. It applies to almost 50% of the population, especially people using contact lenses. It is believed that meibomian gland dysfunction is the most common cause of abnormal stability and integrity of the tear lm. Despite this, there is no commercially available equipment for the diagnosis. The article proposes the construction of an optical sensor and a computer system for the rapid, non-invasive diagnosis of meibomian gland dysfunction. The designed hardware and software as well as preliminary results of clinical research are also described.

show abstract

Research and Parameter Optimization of the Infrared Sensor for Eye Track

Cited by 7 publications

References 3 publications

New Vision Sensor to Measure Gas Pressure

New Vision Sensor to Measure Gas Pressure

Estimation of operators’ fatigue using optical methods for determination of pupil activity

An Infrared Sensor for Monitoring Meibomian Gland Dysfunction

Contact Info

Product

Resources

About