PHOTO
GRAM
METRY
Presented by Joel V Zachariah
PYCON INDIA 2019 | LIGHTNING TALKS
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DISCLAIMER!!!
I am an absolute noob in this field
I am sharing my curiosity driven pursuit with
you
Please educate me if you know better
PyCon India 2019 | Joel Vilanilam Zachariah
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SUMMARY OF
CONTENTS
OUR MAIN
TOPICS
(ALL IN 5 MINUTES!)
What?
PyCon India 2019 | Joel Vilanilam Zachariah
How?
Paper
Explorations
Getting started
Why?
Math Involved
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WHAT IS IT?
BASIS: PRINCIPLES OF PERSPECTIVE
AND PROJECTIVE GEOMETRY
PyCon India 2019 | Joel Vilanilam Zachariah
P H O T O + G R A M + M E T R Y
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Perspective is seeing of an
object behind a sheet of
glass...
HOW: FROM BACK THEN...
LEONARDO DA VINCI, 1480
PyCon India 2019 | Joel Vilanilam Zachariah
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...LEADING UNTIL NOW
Specialized software algorithms
Depth Sensors in cameras (RGB + D)
Imrpovements in Stereo-imaging techniques
PyCon India 2019 | Joel Vilanilam Zachariah
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MATH INVOLVED
TRIANGULATION
TRANSFORMATIONS
PLANAR RECTIFICATION
CAMERA ROTATION
PERSPECTIVE
FINAL ORIENTATION
PyCon India 2019 | Joel Vilanilam Zachariah
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Randomized
Correspondence
Algorithm for
Structural Image
Editing
Based on nearest
neighbor field.
PatchMatch
Algorithm
Weak Surface
Support
Dense Mutiview
Stereo
Let There be
Light!
PAPER
EXPLORATIONS
PyCon India 2019 | Joel Vilanilam Zachariah
Exploiting visibility
information in surface
reconstruction to
preserve weakly
supported surfaces.
Occluder reveals
itself in occlusion
High accuracy and
visibility-consistent
dense multi-view
stereo.
Overcomes limitations
of uncontrolled
imaging conditions
Large scale texturing
of 3D reconstruction
Capturing true texture
despite challenges
such as blur,
exposure varience
etc.
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WHY IS IT RELEVANT?
POSSIBLE APPLICATIONS
3D Objects from
2D Images
Surveys, VR, and
much more!
Item 1 Item 2 Item 3 Item 4
40
30
20
10
0
Measure App
in iOS devices
PyCon India 2019 | Joel Vilanilam Zachariah
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COMPUTATIONAL
PHOTOGRAPHY
Principals involved in image processing
PHOTOGRAMMETRY
SOFTWARES
Use existing solutions like Meshroom
EXPLORE SKETCHFAB
See whats out there - and be inspired!
GETTING STARTED
PyCon India 2019 | Joel Vilanilam Zachariah
OPENCV TUTORIALS
Get full control of your system
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PyCon India 2019 | Joel Vilanilam Zachariah
Thank you for your 300 seconds!
MEDIUM
@joelvzach
G-MAIL
[email protected]
TWITTER
@joelvzach
Full write up at bit.ly/photogram-article