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Expansion of Smartwatch Touch Interface from Touchscreen to Around Device Interface Using Infrared Line Image Sensors.

Lim SC, Shin J, Kim SC, Park J - Sensors (Basel) (2015)

Bottom Line: However, the small form factor of a smartwatch limits the available interactive surface area.For complete touch-sensing solution, a gyroscope installed in the smartwatch is used to read the wrist gestures.Our system not only affords a novel experience for smartwatch users, but also provides a basis for developing other useful interfaces.

View Article: PubMed Central - PubMed

Affiliation: Device & System Research Center, Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea. soochul.lim@samsung.com.

ABSTRACT
Touchscreen interaction has become a fundamental means of controlling mobile phones and smartwatches. However, the small form factor of a smartwatch limits the available interactive surface area. To overcome this limitation, we propose the expansion of the touch region of the screen to the back of the user's hand. We developed a touch module for sensing the touched finger position on the back of the hand using infrared (IR) line image sensors, based on the calibrated IR intensity and the maximum intensity region of an IR array. For complete touch-sensing solution, a gyroscope installed in the smartwatch is used to read the wrist gestures. The gyroscope incorporates a dynamic time warping gesture recognition algorithm for eliminating unintended touch inputs during the free motion of the wrist while wearing the smartwatch. The prototype of the developed sensing module was implemented in a commercial smartwatch, and it was confirmed that the sensed positional information of the finger when it was used to touch the back of the hand could be used to control the smartwatch graphical user interface. Our system not only affords a novel experience for smartwatch users, but also provides a basis for developing other useful interfaces.

No MeSH data available.


Calibration method and sample results of the relationship between the IR intensity and the pixel position.
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sensors-15-16642-f005: Calibration method and sample results of the relationship between the IR intensity and the pixel position.

Mentions: Because of the size and color differences among human hands, initial calibration of the finger position is necessary. The calibration method is illustrated in Figure 5. During each of the swipe motions (SW1 and SW2) at each end of the back of the hand, the maximum peak intensity of each pixel (Mupper sw1, Mbottom sw1, Mupper sw2, and Mbottom sw2) of the two IR line sensors (upper and lower sensors) for each finger position is measured. By comparing the acquired data with that in Figure 4, the internally saved pre-measured robot-tip position data is remapped. The user can thus use the final calculated x-y positions on the back of the hand to control the smartwatch.


Expansion of Smartwatch Touch Interface from Touchscreen to Around Device Interface Using Infrared Line Image Sensors.

Lim SC, Shin J, Kim SC, Park J - Sensors (Basel) (2015)

Calibration method and sample results of the relationship between the IR intensity and the pixel position.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541898&req=5

sensors-15-16642-f005: Calibration method and sample results of the relationship between the IR intensity and the pixel position.
Mentions: Because of the size and color differences among human hands, initial calibration of the finger position is necessary. The calibration method is illustrated in Figure 5. During each of the swipe motions (SW1 and SW2) at each end of the back of the hand, the maximum peak intensity of each pixel (Mupper sw1, Mbottom sw1, Mupper sw2, and Mbottom sw2) of the two IR line sensors (upper and lower sensors) for each finger position is measured. By comparing the acquired data with that in Figure 4, the internally saved pre-measured robot-tip position data is remapped. The user can thus use the final calculated x-y positions on the back of the hand to control the smartwatch.

Bottom Line: However, the small form factor of a smartwatch limits the available interactive surface area.For complete touch-sensing solution, a gyroscope installed in the smartwatch is used to read the wrist gestures.Our system not only affords a novel experience for smartwatch users, but also provides a basis for developing other useful interfaces.

View Article: PubMed Central - PubMed

Affiliation: Device & System Research Center, Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea. soochul.lim@samsung.com.

ABSTRACT
Touchscreen interaction has become a fundamental means of controlling mobile phones and smartwatches. However, the small form factor of a smartwatch limits the available interactive surface area. To overcome this limitation, we propose the expansion of the touch region of the screen to the back of the user's hand. We developed a touch module for sensing the touched finger position on the back of the hand using infrared (IR) line image sensors, based on the calibrated IR intensity and the maximum intensity region of an IR array. For complete touch-sensing solution, a gyroscope installed in the smartwatch is used to read the wrist gestures. The gyroscope incorporates a dynamic time warping gesture recognition algorithm for eliminating unintended touch inputs during the free motion of the wrist while wearing the smartwatch. The prototype of the developed sensing module was implemented in a commercial smartwatch, and it was confirmed that the sensed positional information of the finger when it was used to touch the back of the hand could be used to control the smartwatch graphical user interface. Our system not only affords a novel experience for smartwatch users, but also provides a basis for developing other useful interfaces.

No MeSH data available.