scholarly journals Random Spray Retinex Extensions Considering Region of Interest and EyeMovements

2020 ◽  
Vol 2020 (15) ◽  
pp. 60403-1-60403-6
Author(s):  
Midori Tanaka ◽  
Matteo Paolo Lanaro ◽  
Takahiko Horiuchi ◽  
Alessandro Rizzi

The Random spray Retinex (RSR) algorithm was developed by taking into consideration the mathematical description of Milano-Retinex. The RSR substituted random paths with random sprays. Mimicking some characteristics of the human visual system (HVS), this article proposes two variants of RSR adding a mechanism of region of interest (ROI). In the first proposed model, a cone distribution based on anatomical data is considered as ROI. In the second model, the visual resolution depending on the visual field based on the knowledge of visual information processing is considered as ROI. We have measured actual eye movements using an eye-tracking system. By using the eye-tracking data, we have simulated the HVS using test images. Results show an interesting qualitative computation of the appearance of the processed area around real gaze points.

2019 ◽  
Vol 63 (6) ◽  
pp. 60403-1-60403-6
Author(s):  
Midori Tanaka ◽  
Matteo Paolo Lanaro ◽  
Takahiko Horiuchi ◽  
Alessandro Rizzi

Abstract The Random spray Retinex (RSR) algorithm was developed by taking into consideration the mathematical description of Milano-Retinex. The RSR substituted random paths with random sprays. Mimicking some characteristics of the human visual system (HVS), this article proposes two variants of RSR adding a mechanism of region of interest (ROI). In the first proposed model, a cone distribution based on anatomical data is considered as ROI. In the second model, the visual resolution depending on the visual field based on the knowledge of visual information processing is considered as ROI. We have measured actual eye movements using an eye-tracking system. By using the eye-tracking data, we have simulated the HVS using test images. Results show an interesting qualitative computation of the appearance of the processed area around real gaze points.


Author(s):  
Natal’ya V. Zvyagina ◽  
◽  
Anna I. Taleeva ◽  
Dar’ya A. Kuznetsova

The study of oculomotor reactions in the process of performing cognitive tasks is becoming increasingly popular among psychophysiologists. The use of eye tracking techniques extended our knowledge about eye movements when perceiving visual information. Modern research using eye tracking focuses on oculomotor reactions while perceiving images and texts, performing logical visual tasks, etc. It should be noted that eye tracking parameters in visual cognitive activity not only reflect the peculiarities of eye movements, but also serve as markers of brain activity in terms of perception and processing of information. Of particular interest are eye tracking studies involving reading texts of varying complexity and emotional content with normal and inverted word order in sentences. This paper presents the results of an eyetracking research involving students during visual perception of texts. Two types of texts were used: text with correct order of letters and text with changed order of letters in words. We examined 40 students of Northern (Arctic) Federal University named after M.V. Lomonosov using the eye tracking system iView X ™ RED (SensoMotoric Instruments, Germany). It recorded a significantly higher number of fixations and saccades as well as longer duration of fixations while reading the text with changed order of letters in words. The subjects demonstrated a holistic perception of words when working with the text with changed order of letters, which led to shorter reading time. As a result, we identified two ways of visual information processing with high reproducibility, regardless of the text type: focused and superficial reading. For citation: Zvyagina N.V., Taleeva A.I., Kuznetsova D.A. Oculomotor Reactions in Students During Text Perception. Journal of Medical and Biological Research, 2021, vol. 9, no. 2, pp. 145–152. DOI: 10.37482/2687-1491-Z052


2020 ◽  
Author(s):  
David Harris ◽  
Mark Wilson ◽  
Tim Holmes ◽  
Toby de Burgh ◽  
Samuel James Vine

Head-mounted eye tracking has been fundamental for developing an understanding of sporting expertise, as the way in which performers sample visual information from the environment is a major determinant of successful performance. There is, however, a long running tension between the desire to study realistic, in-situ gaze behaviour and the difficulties of acquiring accurate ocular measurements in dynamic and fast-moving sporting tasks. Here, we describe how immersive technologies, such as virtual reality, offer an increasingly compelling approach for conducting eye movement research in sport. The possibility of studying gaze behaviour in representative and realistic environments, but with high levels of experimental control, could enable significant strides forward for eye tracking in sport and improve understanding of how eye movements underpin sporting skills. By providing a rationale for virtual reality as an optimal environment for eye tracking research, as well as outlining practical considerations related to hardware, software and data analysis, we hope to guide researchers and practitioners in the use of this approach.


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