Signal Processing - January 2017 - 85
uses wearable and micro hand gestures
to control smart devices [9]. Figures 6-8
illustrate the design and functionalities.
A tutorial for a do-it-yourself Sky Imager is offered in "DIY Sky Imager for
Weather Observation," by Soumyabrata
Dev (Nanyang Technological University), Florian M. Savoy (University of Illinois at Urbana Champaign's Singapore
and Advanced Digital Sciences Center),
Dr. Yee Hui Lee (Nanyang Technological University), and Dr. Stefan Winkler
(University of Illinois at Urbana Champaign's Singapore and Advanced Digital
Sciences Center); for more information
see https://github.com/FSavoy/DIY-skyimager and https://sigport.org/documents/
diy-sky-imager-weather-observation.
(a) Finger
(b) Button On
(d) Motion Up
(e) Motion Down
off (BtnOff), (d) motion up (MtnUp), (e) motion down (MtnDn), and (f) screw.
Frame 16 Reflection Intensity Contour
0.08
0.08
Index Finger
State 1
0.06
0.05
Thumb
0.04
Noise
State-1
State-1
Noise
0.07
Range at m
Range at m
0.07
0.02
State 3
0.06
0.04
0.02
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
Velocity at milliseconds
Frame 25 Reflection Intensity Contour
0.08
0.08
0.07
0.07
0.04
State 3
Range at m
Range at m
Frame 16 Reflection Intensity Contour
0.05
State 3
0.03
State-1
State 4
State 4
0.05
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
Velocity at milliseconds
0.06
(f) Screw
Figure 6. Examples of micro hand gestures, named by (a) finger, (b) button on (BtnOn), (c) button
Frame 8 Reflection Intensity Contour
0.03
(c) Button Off
0.06
0.05
State 9
0.04
0.03
0.03
0.02
0.02
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
Velocity at milliseconds
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4
Velocity at milliseconds
Figure 7. Range-Doppler feature frames sampled in the "button off" (see Figure 1) gesture. (a) Index finger and thumb separate at a 3-cm distance.
Noises will be removed using time smoothing to increase robustness as the three marked "noise" objects in the first subfigure. (b) and (c) The index
finger is moving down with acceleration while the thumb almost keeps static with a tiny velocity moving up. (d) Two fingers get touched. Note that the
object's trajectory will always be a curve in the range-Doppler plane. The symbolized states are labeled at the center of the detected objects.
IEEE Signal Processing Magazine
|
January 2017
|
85
https://www.github.com/FSavoy/DIY-sky
https://www.sigport.org/documents/
Table of Contents for the Digital Edition of Signal Processing - January 2017
Signal Processing - January 2017 - Cover1
Signal Processing - January 2017 - Cover2
Signal Processing - January 2017 - 1
Signal Processing - January 2017 - 2
Signal Processing - January 2017 - 3
Signal Processing - January 2017 - 4
Signal Processing - January 2017 - 5
Signal Processing - January 2017 - 6
Signal Processing - January 2017 - 7
Signal Processing - January 2017 - 8
Signal Processing - January 2017 - 9
Signal Processing - January 2017 - 10
Signal Processing - January 2017 - 11
Signal Processing - January 2017 - 12
Signal Processing - January 2017 - 13
Signal Processing - January 2017 - 14
Signal Processing - January 2017 - 15
Signal Processing - January 2017 - 16
Signal Processing - January 2017 - 17
Signal Processing - January 2017 - 18
Signal Processing - January 2017 - 19
Signal Processing - January 2017 - 20
Signal Processing - January 2017 - 21
Signal Processing - January 2017 - 22
Signal Processing - January 2017 - 23
Signal Processing - January 2017 - 24
Signal Processing - January 2017 - 25
Signal Processing - January 2017 - 26
Signal Processing - January 2017 - 27
Signal Processing - January 2017 - 28
Signal Processing - January 2017 - 29
Signal Processing - January 2017 - 30
Signal Processing - January 2017 - 31
Signal Processing - January 2017 - 32
Signal Processing - January 2017 - 33
Signal Processing - January 2017 - 34
Signal Processing - January 2017 - 35
Signal Processing - January 2017 - 36
Signal Processing - January 2017 - 37
Signal Processing - January 2017 - 38
Signal Processing - January 2017 - 39
Signal Processing - January 2017 - 40
Signal Processing - January 2017 - 41
Signal Processing - January 2017 - 42
Signal Processing - January 2017 - 43
Signal Processing - January 2017 - 44
Signal Processing - January 2017 - 45
Signal Processing - January 2017 - 46
Signal Processing - January 2017 - 47
Signal Processing - January 2017 - 48
Signal Processing - January 2017 - 49
Signal Processing - January 2017 - 50
Signal Processing - January 2017 - 51
Signal Processing - January 2017 - 52
Signal Processing - January 2017 - 53
Signal Processing - January 2017 - 54
Signal Processing - January 2017 - 55
Signal Processing - January 2017 - 56
Signal Processing - January 2017 - 57
Signal Processing - January 2017 - 58
Signal Processing - January 2017 - 59
Signal Processing - January 2017 - 60
Signal Processing - January 2017 - 61
Signal Processing - January 2017 - 62
Signal Processing - January 2017 - 63
Signal Processing - January 2017 - 64
Signal Processing - January 2017 - 65
Signal Processing - January 2017 - 66
Signal Processing - January 2017 - 67
Signal Processing - January 2017 - 68
Signal Processing - January 2017 - 69
Signal Processing - January 2017 - 70
Signal Processing - January 2017 - 71
Signal Processing - January 2017 - 72
Signal Processing - January 2017 - 73
Signal Processing - January 2017 - 74
Signal Processing - January 2017 - 75
Signal Processing - January 2017 - 76
Signal Processing - January 2017 - 77
Signal Processing - January 2017 - 78
Signal Processing - January 2017 - 79
Signal Processing - January 2017 - 80
Signal Processing - January 2017 - 81
Signal Processing - January 2017 - 82
Signal Processing - January 2017 - 83
Signal Processing - January 2017 - 84
Signal Processing - January 2017 - 85
Signal Processing - January 2017 - 86
Signal Processing - January 2017 - 87
Signal Processing - January 2017 - 88
Signal Processing - January 2017 - 89
Signal Processing - January 2017 - 90
Signal Processing - January 2017 - 91
Signal Processing - January 2017 - 92
Signal Processing - January 2017 - 93
Signal Processing - January 2017 - 94
Signal Processing - January 2017 - 95
Signal Processing - January 2017 - 96
Signal Processing - January 2017 - 97
Signal Processing - January 2017 - 98
Signal Processing - January 2017 - 99
Signal Processing - January 2017 - 100
Signal Processing - January 2017 - 101
Signal Processing - January 2017 - 102
Signal Processing - January 2017 - 103
Signal Processing - January 2017 - 104
Signal Processing - January 2017 - 105
Signal Processing - January 2017 - 106
Signal Processing - January 2017 - 107
Signal Processing - January 2017 - 108
Signal Processing - January 2017 - 109
Signal Processing - January 2017 - 110
Signal Processing - January 2017 - 111
Signal Processing - January 2017 - 112
Signal Processing - January 2017 - 113
Signal Processing - January 2017 - 114
Signal Processing - January 2017 - 115
Signal Processing - January 2017 - 116
Signal Processing - January 2017 - Cover3
Signal Processing - January 2017 - Cover4
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