New Applications of the Image Grand Tour Jrgen Symanzik*, Utah - - PowerPoint PPT Presentation

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May 18, 2023 164 likes •428 views

New Applications of the Image Grand Tour Jrgen Symanzik*, Utah State University, Logan, UT Edward J. Wegman, George Mason University Amy Braverman, Jet Propulsion Laboratory *e-mail: symanzik@sunfs.math.usu.edu WWW:

SLIDE 1

New Applications of the Image Grand Tour

Jürgen Symanzik*, Utah State University, Logan, UT Edward J. Wegman, George Mason University Amy Braverman, Jet Propulsion Laboratory

*e-mail: symanzik@sunfs.math.usu.edu WWW: http://www.math.usu.edu/~symanzik

SLIDE 2

Overview

I Pixel Tours and IGT I Example 1: Minefield I Example 2: MISR I Example 3: Petroglyphs I Conclusion

SLIDE 3

Image Grand Tour (IGT)

I Wanted – A method to address:

N Multispectral imagery N Satellite imagery various look angles N Multiple time series

! Seismic Signals ! Electrocardiograms

I Our approach: Image Grand Tour I Original Developers:

Wegman, Poston, Solka

SLIDE 4

Pixel Tours (1)

SLIDE 5

Pixel Tours (2)

SLIDE 6

Pixel Tours (3)

I Possible Implementations:

N Hypercube/Torus Tour N Random Interpolation Tour N Fractal Tour N Pseudo Grand Tour

SLIDE 7

Example 1: Minefield (1)

SLIDE 8

Example 1: Minefield (2)

SLIDE 9

Example 1: Minefield (3)

SLIDE 10

Example 1: Minefield (4) - Snapshot

SLIDE 11

Example 1: Minefield (5) - Movie

IGT Movie: Minefield

SLIDE 12

Example 2: MISR (1)

I MISR: Multi-angle Imaging

SpectroRadiometer

N On board of NASA’s Earth Observing

System satellite Terra

N 9 cameras (at 9 different angles):

! 70.5, 60, 45, and 26.1 degrees (forward

and aft), 0 degrees

! 4 bands each: R, G, B, NIR

N Pixels: 1.1km x 1.1 km

SLIDE 13

Example 2: MISR (2)

SLIDE 14

Example 2: MISR (3)

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Example 2: MISR (4)

I North coast of Alaska (incl. Arctic National

Wildlife Refuge)

I Ice: top - Land: bottom I RGB composite of nadir (0 degree) camera I Challenges:

N Identifying clouds over ice and snow N Distinguishing among different types of ice

(old/new, broken/solid)

I Multi-angle - multi-spectral data allows such

identification via IGT

SLIDE 16

Example 2: MISR (5)

SLIDE 17

Example 2: MISR (6)

IGT Movie: MISR

SLIDE 18

Example 3: Petroglyphs (1)

I Pictographs from Hueco Tanks State

Historical Park (east of El Paso, TX)

N Faded over centuries N Destroyed through vandalism

I Current digital enhancement techniques

time-consuming

I Use of IGT: faster detection of hidden

features

I Photographs provided by Robert Mark

SLIDE 19

Example 3: Petroglyphs (2)

SLIDE 20

Example 3: Petroglyphs (3)

IGT Movie: Petroglyphs 1

SLIDE 21

Example 3: Petroglyphs (4)

SLIDE 22

Example 3: Petroglyphs (5)

IGT Movie: Petroglyphs 2

SLIDE 23

Example 3: Petroglyphs (6)

SLIDE 24

Discussion

I IGT useful for multiple applications I Fast to find “interesting” features in

images

I Does not produce “nice” images I Static view and movie view of interest I Intended to add new functionality

SLIDE 25

Contact

I Jürgen Symanzik

N symanzik@sunfs.math.usu.edu

I Website

N www.math.usu.edu/~symanzik