Start your free trial
Login
Browsing

Publication Tag: Usability

An overview of all publications that have the tag you selected.

2006
113 citations
The FaceReader: Measuring instant fun of use
Zaman, Shrimpton-Smith
Recently, more and more attention has been paid to emotions in the domain of Human-Computer Interaction. When evaluating a product, one can no longer ignore the emotions a product induces. This paper examines the value of a new instrument to measure emotions: the FaceReader. We will assess the extent to which the FaceReader is useful when conducting usability evaluations. To do this, we will compare the data gained from the FaceReader with two other sources: user questionnaires and researcher’s loggings. Preliminary analysis shows that the FaceReader is an effective tool to measure instant emotions and fun of use. However, a combination of the FaceReader with another observation method is necessary. As regards the user questionnaire, our results indicate that it is rather a reflection of the content of the application or the outcome of a task, than a correct self-reflection of how the user felt when accomplishing the task.
Read the publication

Tags

2012
29 citations
Relating Perceived Web Page Complexity to Emotional Valence and Eye Movement Metrics
Goldberg
Initial impressions of visual complexity significantly impact both consumer and enterprise web page designs. To integrate complexity assessment methods into usability tools, a study was conducted comparing subjective ratings, eye tracking, JPEG-compressed file size, and emotional valence measures. Professional enterprise users performed search tasks and evaluated web page complexity. Multivariate factor analysis and ordinal logistic regressions on subjective ratings revealed that perceptions of page complexity were influenced by self-assessed search difficulty and page density. Lower complexity ratings correlated with increased fixation durations and reduced search areas. Facial analysis indicated that aggregated emotional valence improved with higher clarity ratings. Overall, both pre-attentive eye tracking and emotional valence measures were associated with conscious subjective complexity judgments. Further research is recommended to attribute complexity-inducing features to measurable qualities.
Read the publication

Tags

2007
3 citations
Visual Alphabets: Video Classification by End Users
M. Israël, E.L. van den Broek, P. van der Putten, M.J. den Uyl
The work presented here introduces a real-time automatic scene classifier within content-based video retrieval. In our envisioned approach, end users like documentalists, not image processing experts, build classifiers interactively by simply indicating positive examples of a scene. Classification consists of a two-stage procedure. First, small image fragments called patches are classified. Second, frequency vectors of these patch classifications are fed into a second classifier for global scene classification . The first stage classifiers can be seen as a set of highly specialized, learned feature detectors, as an alternative to letting an image processing expert determine features a priori. The end user or domain expert thus builds a visual alphabet that can be used to describe the image in features that are relevant for the task at hand. We present results for experiments on a variety of patch and image classes. The scene classifier approach has been successfully applied to other domains of video content analysis, such as content-based video retrieval in television archives, automated sewer inspection, and porn filtering.
Read the publication

Tags

2007
2 citations
Towards Embeddable Vision Architectures for Human Computing
M. den Uyl
Human Computing is about perceptive, anticipatory interfaces that support natural and intuitive human-computer interaction by understanding human behavior, emotions and social signaling. Yet, machine understanding of human behavior and emotion is limited and fragmented until this day. It is proposed that in order to manage the complexities of multimodal, multilevel and contextual machine perception of human behavior, an embedded systems approach towards the design of vision architectures for human computing seems advisable. The problems encountered in such an approach are illustrated from past and present development projects on vision systems for watching humans.
Read the publication

Tags

2013
14 citations
User assisted disparity remapping for stereo images
H.E. Tasli, A.A. Alatan
This study focuses on user-assisted disparity remapping for stereo images, allowing the alteration of an object’s disparity while keeping the rest of the scene unchanged. This technique is beneficial for emphasizing or de-emphasizing objects by adjusting their perceived depth relative to the camera. It can also serve as a post-processing method for adapting stereoscopic content to various display sizes and resolutions. The approach includes an MRF-based energy minimization process for interactive stereo image segmentation, requiring user input on only one image of the stereo pair to identify the stereo object pair’s location. A significant contribution of this work is the elimination of the dense disparity estimation step, achieved through sparse feature matching between stereo pairs. Additionally, the technique enables the synthesis of new disparity-adjusted views using the segmented stereo objects and background information. Both qualitative and quantitative evaluations demonstrate the effectiveness and superiority of the proposed method.
Read the publication

Tags

2015
8 citations
Who do you want to be? Real-time face swap
T.M. den Uyl, H.E. Tasli, P. Ivan, M. Snijdewind
This demonstration paper presents a face swap application where two people’s faces are automatically exchanged in real-time without any calibration or training. This is performed using the Active Appearance Models technique. A realistic visualization is achieved using an adaptive texture sampling technique. The face swap is performed irrespective of the sex, age or ethnicity of the subject in front of the camera. This application is intended for gaming, shopping, educational or entertainment purposes and will be presented in a real-time setup during the demo session.
Read the publication

Tags

2021
26 citations
Efficiency in real-time webcam gaze tracking
A. Gudi, X Li and J. van Gemert
Efficiency and ease of use are essential for practical applications of camera-based eye/gaze-tracking. Gaze tracking involves estimating where a person is looking on a screen based on face images from a computer-facing camera. In this paper, we investigate two complementary forms of efficiency in gaze tracking: 1. The computational efficiency of the system, which is dominated by the inference speed of a CNN predicting gaze-vectors; 2. The usability efficiency, which is determined by the tediousness of the mandatory calibration of the gaze-vector to a computer screen. To do so, we evaluate the computational speed/accuracy trade-off for the CNN and the calibration effort/accuracy trade-off for screen calibration. For the CNN, we evaluate the full face, two-eyes, and single eye input. For screen calibration, we measure the number of calibration points needed and evaluate three types of calibration: 1. pure geometry, 2. pure machine learning, and 3. hybrid geometric regression. Results suggest that a single eye input and geometric regression calibration achieve the best trade-off.
Read the publication

Tags

2021
14 citations
Complex website tasks increase the expression anger measured with FaceReader online
L. Talen and T.E. den Uyl
To stand out among the large variations of websites that exist, users should have a good experience. Earlier research found that a good experience influences important user behavior statistics, such as further use of the website. Complexity seems to play a role in the usability of websites and a blockage or delay in reaching the goal leads to negative feelings such as frustration. In this study, FaceReader Online, a tool to measure facial expressions via the internet, was used to measure the effect of the complexity of website design and website tasks on the facial expression anger. Because the expression scores had a low intensity, we calculated a metric for the peak expression. The results indicated that in the more complex tasks the facial expression of anger was higher. These results suggest that the automatically detected facial expression anger could be used to measure usability aspects of a website.
Read the publication

Tags

2018
35 citations
Conveying facial expressions to blind and visually impaired persons through a wearable vibrotactile device
H.P. Buimer, M. Bittner, T. Kostelijk, T.M. van der Geest, A. Nemri, R. J. A. van Wezel and Y. Zhao
In face-to-face social interactions, blind and visually impaired persons lack access to nonverbal cues like facial expressions, body posture, and gestures, which may lead to impaired interpersonal communication. In this study, a wearable sensory substitution device consisting of a head-mounted camera and a haptic belt was evaluated to determine whether vibrotactile cues around the waist could be used to convey facial expressions to users and whether such a device is desired by VIPs for use in daily living situations. Ten VIPs and 10 sighted persons participated in the study, in which validated sets of pictures, silent videos, and videos with audio of facial expressions were presented to the participant. A control measurement was first performed to determine how accurately participants could identify facial expressions while relying on their functional senses. After a short training, participants were asked to determine facial expressions while wearing the emotion feedback system. VIPs using the device showed significant improvements in their ability to determine which facial expressions were shown. A significant increase in accuracy of 44.4% was found across all types of stimuli when comparing the scores of the control and supported phases. The greatest improvements achieved with the support of the SSD were found for silent stimuli . SPs also showed consistent, though not statistically significant, improvements while supported. Overall, our study shows that vibrotactile cues are well suited to convey facial expressions to VIPs in real-time. Participants became skilled with the device after a short training session. Further testing and development of the SSD is required to improve its accuracy and aesthetics for potential daily use.
Read the publication

Tags

Socials

Facebook Linkedin Youtube

Address

Singel 160
1015 AH Amsterdam
The Netherlands

Telephone

+31 20 2213035

E-mail

info@facereader-online.com

Products

Use cases

Information

Science

About

Copyright ©

2025

Human Insight Services B.V.

Request a free trial

Get your free example report

Get your free whitepaper