- Visual perception and processing mechanisms
- Gaze Tracking and Assistive Technology
- Visual Attention and Saliency Detection
- Neural and Behavioral Psychology Studies
- Neural dynamics and brain function
- Tactile and Sensory Interactions
- Visual and Cognitive Learning Processes
- Reading and Literacy Development
- EEG and Brain-Computer Interfaces
- Multisensory perception and integration
- Motor Control and Adaptation
- Spatial Cognition and Navigation
- Glaucoma and retinal disorders
- Color perception and design
- Image Retrieval and Classification Techniques
- Action Observation and Synchronization
- Advanced Vision and Imaging
- Face Recognition and Perception
- Vestibular and auditory disorders
- Retinal Imaging and Analysis
- Cognitive and developmental aspects of mathematical skills
- CCD and CMOS Imaging Sensors
- Data Visualization and Analytics
- Retinal Development and Disorders
- Brain Tumor Detection and Classification
University of Massachusetts Boston
2015-2024
University of Toronto
2000-2020
Edith Nourse Rogers Memorial Veterans Hospital
2018
Harvard University
2018
Boston University
2002-2014
University of Massachusetts Amherst
2012-2014
Korea Institute of Civil Engineering and Building Technology
2005
In-Q-Tel
2003
Bielefeld University
1994-1998
This paper describes how to recognize certain types of human physical activities using acceleration data generated by a user's cell phone. We propose recognition system in which new digital low-pass filter is designed order isolate the component gravity from that body raw data. The was trained and tested an experiment with multiple subjects real-world conditions. Several classifiers were various statistical features. High-frequency low-frequency components taken into account. selected five...
The reported research extends classic findings that after briefly viewing structured, but not random, chess positions, masters reproduce these positions much more accurately than less-skilled players. Using a combination of the gaze-contingent window paradigm and change blindness flicker paradigm, we documented dramatically larger visual spans for experts while processing positions. In addition, in check-detection task, minimized 3 x chessboard containing King potentially checking pieces was...
E-readers are fast rivaling print as a dominant method for reading. Because they offer accessibility options that impossible in print, potentially beneficial those with impairments, such dyslexia. Yet, little is known about how the use of these devices influences reading who struggle. Here, we observe comprehension and speed 103 high school students Reading on paper was compared small handheld e-reader device, formatted to display few words per line. We found device significantly improved...
People with dyslexia, who ordinarily struggle to read, sometimes remark that reading is easier when e-readers are used. Here, we used eye tracking observe high school students dyslexia as they read using these devices. Among the factors investigated, found a small device resulted in substantial benefits, improving speeds by 27%, reducing number of fixations 11%, and importantly, regressive saccades more than factor 2, no cost comprehension. Given an expected trade-off between horizontal...
Breast cancer is the second leading cause of death among a large number women worldwide. It may be challenging for radiologists to diagnose and treat breast cancer. Consequently, primary care improves disease prevention death. Early detection increases treatment options saves life, which major target this research. This research indicates versatility methodology by integrating contemporary segmentation approaches with machine learning methods, are developing areas In pre-processing process,...
The detection of meningioma tumors is the most crucial task compared with other because their lower pixel intensity. Modern medical platforms require a fully automated system for detection. Hence, this study proposes novel and highly efficient hybrid Convolutional neural network (HCNN) classifier to distinguish brain images from non-meningioma images. HCNN classification technique consists Ridgelet transform, feature computations, module, segmentation algorithm. Pixel stability during...
Two experiments on the perception and eye-movement scanning of a set six overtly ambiguous pictures are reported. In first experiment it was shown that specific perceptual interpretations an picture usually correlate with parameters gaze-position distributions. second these distributions were used for image processing initial in such way regions which attracted less fixations brightness all elements lowered. The preprocessed then to group 150 naïve subjects identification. results this...
Recently, there has been great interest among vision researchers in developing computational models that predict the distribution of saccadic endpoints naturalistic scenes. In many these studies, subjects are instructed to view scenes without any particular task mind so stimulus-driven (bottom-up) processes guide visual attention. However, whenever is a search task, goal-driven (top-down) tend dominate guidance, as indicated by attention being systematically biased toward image features...
Advancements in Industry 4.0 brought tremendous improvements the healthcare sector, such as better quality of treatment, enhanced communication, remote monitoring, and reduced cost. Sharing data with providers is crucial for harnessing benefits improvements. In general, holds sensitive information about individuals. Hence, sharing challenging because various security privacy issues. According to regulations ethical requirements, it essential preserve patients before medical research....
We examined the flexibility of guidance in a conjunctive search task by manipulating ratios between different types distractors. Participants were asked to decide whether target was present or absent among distractors sharing either colour shape. Results indicated strong effect distractor ratio on performance. Shorter latency move, faster manual response, and fewer fixations per trial observed at extreme ratios. The distribution saccadic endpoints also varied flexibly as function ratio. When...
Abstract When we look at real-world scenes, attention seems disproportionately attracted by texts that are embedded in these for instance, on signs or billboards. The present study was aimed verifying the existence of this bias and investigating its underlying factors. For purpose, data from a previous experiment were reanalyzed four new experiments measuring eye movements during viewing scenes conducted. By pairing text objects with matching control regions, following main results obtained:...
Cervical cancer can be cured if it is initially screened and giving timely treatment to the patients. This paper proposes an optimization technique for exposing segmenting portion in cervical images using transform windowing technique. The image processing steps are preprocessing, transformation, feature extraction, optimization, classification, segmentation involved proposed work. Initially, Gabor enforced on test modify pixels associated with spatial domain into multi-resolution domain....
Abstract The Area Activation Model (Pomplun, Reingold, Shen, & Williams, 2000) is a computational model predicting the statistical distribution of saccadic endpoints in visual search tasks. Its basic assumption that saccades tend to foveate display areas provide maximum amount task‐relevant information for processing during subsequent fixation. In present study, counterintuitive prediction by empirically tested, namely selectivity towards stimulus features depends on spatial arrangement...
Abstract In this article we present a new experimental paradigm: comparative visual search. Each half of display contains simple geometrical objects three different colors and forms. The two halves are identical except for one object mismatched in either color or form. subject's task is to find mismatch. We illustrate the potential paradigm investigating underlying complex processes perception cognition by means an eye‐tracking study. Three possible search strategies outlined, discussed,...
Can people react to objects in their visual field that they do not consciously perceive? We investigated how perception and motor action respond moving whose visibility is reduced, we found a dissociation between motion processing for action. compared eye movements evoked by two orthogonally drifting gratings, each presented separately different eye. The strength of monocular grating was manipulated inducing adaptation one prior the presentation both gratings. Reflexive tracked vector...
The adaptation of an observer's saccadic eye movements to artificial post-saccadic visual error can lead perceptual mislocalization individual, transient stimuli. In this study, we demonstrate that simultaneous a consistent pattern across large number saccade vectors is accompanied by corresponding spatial distortions in the perception persistent objects. To induce adaptation, artificially introduced several patterns, which led systematic distortion participants' oculomotor space and their...
People with dyslexia, who face lifelong struggles reading, exhibit numerous associated low-level sensory deficits including in focal attention. Countering this, studies have shown that struggling readers outperform typical some visual tasks integrate distributed information across an expanse. Though such abilities would be expected to facilitate scene memory, prior investigations using the contextual cueing paradigm failed find corresponding advantages dyslexia. We suggest these were...