Huy Viet Le

Huy Viet Le
Universität Stuttgart · Institute for Visualization and Interactive Systems

About

34
Publications
13,842
Reads
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497
Citations

Publications

Publications (34)
Article
Full-text available
While advances in mobile text entry enable smartphone users to type almost as fast as on hardware keyboards, text-heavy activities are still not widely adopted. One reason is the lack of shortcut mechanisms. In this article, we determine shortcuts for text-heavy activities, elicit shortcut gestures, implement them for a fully touch-sensitive smartp...
Conference Paper
Full-text available
With smartphones being a prime example, touchscreens became one of the most widely used interface to interact with computing systems. Compared to other touchscreen devices, smartphones pose additional challenges as the hand that interacts with the device is commonly used to also hold the device. Consequently, determining how fingers of the hand hol...
Conference Paper
Full-text available
Additional input controls such as fingerprint scanners, physical buttons, and Back-of-Device (BoD) touch panels improve the input capabilities on smartphones. While previous work showed the benefits of input beyond the touchscreen, unfavorably designed input controls force detrimental grip changes and increase the likelihood of unintended inputs. R...
Conference Paper
Full-text available
As the touchscreen is the most successful input method of current mobile devices, the importance to transmit more information per touch is raising. A wide range of approaches has been presented to enhance the richness of a single touch. With Apple's 3D Touch, they successfully introduce pressure as a new input dimension into consumer devices. Howev...
Conference Paper
Full-text available
While mobile devices have become essential for social communication and have paved the way for work on the go, their interactive capabilities are still limited to simple touch input. A promising enhancement for touch interaction is knuckle input but recognizing knuckle gestures robustly and accurately remains challenging. We present a method to dif...
Conference Paper
Full-text available
As touchscreens are the most successful input method of current mobile devices, touch gestures became a widely used input technique. While gestures provide users with advantages to express themselves, they also introduce challenges regarding accuracy and memorability. In this paper, we investigate the effect of a gesture's orientation on how well t...
Conference Paper
Full-text available
Touchscreens combine input and output in a single interface. While this enables an intuitive interaction and dynamic user interfaces, the fat-finger problem and the resulting occlusions still impact the input accuracy. Previous work presented approaches to improve the touch accuracy by involving visual features on the top side of fingers, as well a...
Conference Paper
Full-text available
Touchscreens enable intuitive mobile interaction. However, touch input is limited to 2D touch locations which makes it challenging to provide shortcuts and secondary actions similar to hardware keyboards and mice. Previous work presented a wide range of approaches to provide secondary actions by identifying which finger touched the display. While t...
Article
Full-text available
As architects usually decide on the shape and look of windows during the design of buildings, opportunities for interactive windows have not been systematically explored yet. In this work, we extend the vision of sustainable and comfortable adaptive buildings using interactive smart windows. We systematically explore the design space of interactive...
Conference Paper
Full-text available
Smartphones are the most successful mobile devices and offer intuitive interaction through touchscreens. Current devices treat all fingers equally and only sense touch contacts on the front of the device. In this paper, we present InfiniTouch, the first system that enables touch input on the whole device surface and identifies the fingers touching...
Conference Paper
Full-text available
Touchscreens are a common fixture in current vehicles. With autonomous driving, we can expect touch interaction with such in-vehicle media systems to exponentially increase. In spite of vehicle suspension systems, road perturbations will continue to exert forces that can render in-vehicle touch interaction challenging. Using a motion simulator, we...
Research
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High-level APIs such as Keras facilitate the development of deep learning models through a simple interface and enable users to train neural networks within a few lines of code. Building on top of TensorFlow, trained models can be exported and run efficiently on mobile devices. This enables a wide range of opportunities for researchers and develope...
Conference Paper
Full-text available
A large number of today's systems use interactive touch surfaces as the main input channel. Current devices reduce the richness of touch input to two-dimensional positions on the screen. A growing body of work develops methods that enrich touch input to provide additional degrees of freedom for touch interaction. In particular, previous work propos...
Conference Paper
Full-text available
Touchscreens are the most successful input method for smartphones. Despite their flexibility, touch input is limited to the location of taps and gestures. We present Palm Touch, an additional input modality that differentiates between touches of fingers and the palm. Touching the display with the palm can be a natural gesture since moving the thumb...
Conference Paper
Full-text available
Touchscreens are among the most ubiquitous input technologies. Commercial devices typically limit the input to 2D touch points. While a body of work enhances the interaction through finger recognition and diverse gestures, advanced input techniques have had a limited commercial impact. A major challenge is explaining new input techniques to users....
Conference Paper
Full-text available
Previous research and recent smartphone development presented a wide range of input controls beyond the touchscreen. Fingerprint scanners, silent switches, and Back-of-Device (BoD) touch panels offer additional ways to perform input. However, with the increasing amount of input controls on the device, unintentional input or limited reachability can...
Conference Paper
Full-text available
Touchscreens are the most successful input method for smartphones. Despite their flexibility, touch input is limited to the location of taps and gestures. We present PalmTouch, an additional input modality that differentiates between touches of fingers and the palm. Touching the display with the palm can be a natural gesture since moving the thumb...
Conference Paper
Full-text available
Touchscreens enable intuitive interaction through a combination of input and output. Despite the advantages, touch input on smartphones still poses major challenges that impact the usability. Amongst others, this includes the fat-finger problem, reachability challenges and the lack of shortcuts. To address these challenges, I explore interaction me...
Conference Paper
Full-text available
Due to the increasing amount of sensors integrated into the environment and worn by the user, a sheer amount of context-sensitive data become available. While interpreting them with traditional methods (e.g., formulas and simple heuristics) is challenging, the latest machine learning techniques require only a set of labeled data. TensorFlow is an o...
Conference Paper
Full-text available
In the last years, touchscreens became the most common input device for a wide range of computers. While touchscreens are truly pervasive, commercial devices reduce the richness of touch input to two-dimensional positions on the screen. Recent work proposed interaction techniques to extend the richness of the input vocabulary using the finger orien...
Conference Paper
Full-text available
Touchscreens are the dominant input mechanism for a variety of devices. One of the main limitations of touchscreens is the latency to receive input, refresh, and respond. This latency is easily perceivable and reduces users' performance. Previous work proposed to reduce latency by extrapolating finger movements to identify future movements - albeit...
Conference Paper
Full-text available
One key feature of TensorFlow includes the possibility to compile the trained model to run efficiently on mobile phones. This enables a wide range of opportunities for researchers and developers. In this tutorial, we teach attendees two basic steps to run neural networks on a mobile phone: Firstly, we will teach how to develop neural network archit...
Conference Paper
Full-text available
The latency of current mobile devices' touchscreens is around 100ms and has widely been explored. Latency down to 2ms is noticeable, and latency as low as 25ms reduces users' performance. Previous work reduced touch latency by extrapolating a finger's movement using an ensemble of shallow neural networks and showed that predicting 33ms into the fut...
Conference Paper
Full-text available
Previous research proposed a wide range of interaction methods and use cases based on the previously unused back side and edge of a smartphone. Common approaches to implementing Back-of-Device (BoD) interaction include attaching two smartphones back to back and building a prototype completely from scratch. Changes in the device's form factor can in...
Conference Paper
Full-text available
Touchscreens are successful in recent smartphones due to a combination of input and output in a single interface. Despite their advantages, touch input still suffers from common limitations such as the fat-finger problem. To address these limitations, prior work proposed a variety of interaction techniques based on input sensors beyond the touchscr...
Conference Paper
Full-text available
Window facades play an increasingly important role in modern architecture. Regular shutters and blinds allow only coarse control over the sunlight coming through windows. Smart windows using see-through displays can be controlled on a per-pixel basis and thereby have the potential of fine-grained control. In this paper, we explore future interactio...
Conference Paper
Full-text available
With increasingly large smartphones, it becomes more difficult to use these devices one-handed. Due to a large touchscreen, users can not reach across the whole screen using their thumb. In this paper, we investigate approaches to move the screen content in order to increase the reachability during one-handed use of large smartphones. In a first st...
Conference Paper
Full-text available
Notifications are a key feature on current smartphones. Apps gain the attention of the users to inform them about new messages, upcoming appointments or system updates. Previous studies investigated how many notifications users receive and how users interact with those notifications. Related work explored means to manage incoming notifications. In...
Conference Paper
Full-text available
As mobile devices are becoming more ubiquitous, it is common for users to interact with them in many different situations. In our research, we focus on modeling human behavior during touchscreen interaction in mobile situations. Resulting models do not only increase our understanding of human behavior but also predict or infer intended user interac...
Conference Paper
Full-text available
Reviewing lifelogging data has been proposed as a useful tool to support human memory. However, the sheer volume of data (particularly images) that can be captured by modern lifelogging systems makes the selection and presentation of material for review a challenging task. We present the results of a five-week user study involving 16 participants a...
Conference Paper
Full-text available
Smartphones are currently the most successful mobile devices. Through their touchscreens, they combine input and output in a single interface. A body of work investigated interaction beyond direct touch. In particular, previous work proposed using the device's rear as an interaction surface and the grip of the hands that hold the device as a means...
Article
Full-text available
Technology has always had a direct impact on what humans remember. In the era of smartphones and wearable devices, people easily capture information, such as pictures and videos, on a daily basis. The so-called "quantified self" movement focuses on using such captured multimedia information, often in combination with additional contextual data (suc...

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