Newer
Older
---
layout: default
title: Passive scanning
nav_order: 3
mathjax: true
---
# Passive scanning
{: .no_toc}
## Table of contents
{: .no_toc .text-delta }
1. TOC
{:toc}
# Multiview
# Photogrammetry
Photogrammetry is the collection and organization of reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant imagery and other phenomena.
<p>Photogrammetry was first documented by the Prussian architect <a href="https://opus4.kobv.de/opus4-btu/files/749/db186714.pdf">Albrecht Meydenbauer</a> in 1867. Since then it has been used for everything from simple measurement or color sampling to record complex 3d <a href="https://en.wikipedia.org/wiki/Motion_field">motion fields</a>.</p>
<p><img src="images/data_model_photogrammetry.png" alt="Data Model of Photogrammetry"></p>
<p>A typical medium resolution aerial photogrammetry scan of a barn. With 50-100 images a reasonably accurate model can be produced. Such models are often used in surveying and restoration projects from the scale of hand helf objects to cities.</p>
<p><img src="images/house_scanning.jpg" alt="House"></p>
# Stereo Matching and Photogrammetry
<p>Early uses in stereophotogrammetry, the estimation of 3d coordinates from measurements taken from two or more images through the identification of common points. This technology was used throughout the early 20th century for generating topographic maps.</p>
<p><img src="images/stereo_plotter.jpg" alt="StereoPlotter"></p>
<p>stereophotogrammetry is now being used for capturing dynamic characteristics of previously difficult to measure systems like running <a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8348/1/Dynamic-characteristics-of-a-wind-turbine-blade-using-3D-digital/10.1117/12.915377.short?SSO=1">wind turbines</a>.</p>
<p>Photogrammetry is useful for outdoors settings, where all you need is a handheld camera and some patience. In this example, note the loss of quality towards the top, as pixel resolution becomes problematic:</p>
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
<main class="viewer has-model " aria-label="sketchfab-viewer">
<div class="titlebar">
<div class="summary">
<div class="avatar">
<a target="_blank" aria-label="Visit Nicolas Diolez's Profile" href="https://sketchfab.com/nicolasdiolez">
<div class="image-container --cover" style="width:32px;">
<img class="image-container__image" src="https://media.sketchfab.com/avatars/a891e9152dfa4c819dfc0500a5fd5867/5512aead32c84bc0bf64e6c349abed4c.jpeg" alt="">
<div style="padding-top:100.0%;"></div>
</div>
</a>
</div>
<div class="model-info">
<h1 class="title"><span class="model-name">
<a class="model-name__label" data-route="" href="https://sketchfab.com/3d-models/arc-de-triomphe-photogrammetry-65937fd27de647c0a8ac99ce8275c03e" target="_blank" title="Buy Arc de Triomphe - photogrammetry 3D Model">Arc de Triomphe - photogrammetry</a>
<meta itemprop="award" content="Staff Pick">
<span class="flag --staffpicked " title="Staff Picks"></span>
</span></h1>
<h2>by
<a target="_blank" href="https://sketchfab.com/nicolasdiolez">Nicolas Diolez</a>
</h2>
</div>
</div>
<div class="actions">
<a class="help tooltip tooltip-down in-store" data-tooltip="Available on Store" target="_blank" href="https://sketchfab.com/3d-models/arc-de-triomphe-photogrammetry-65937fd27de647c0a8ac99ce8275c03e">
<i class="icon viewer-icon-usd"></i>
</a>
<a class="help tooltip tooltip-down share" data-tooltip="Share" data-action="open-share-overlay">
<i class="viewer-icon-share"></i>
</a>
<a class="help tooltip tooltip-down close hidden" data-tooltip="Stop" data-action="stop">
<i class="viewer-icon-close"></i>
</a>
</div>
</div>
<div class="landing" data-action="start">
<div class="preview">
<div class="image-container --cover" style="width:100%;">
<img class="image-container__image" src="https://media.sketchfab.com/models/65937fd27de647c0a8ac99ce8275c03e/thumbnails/2a28add5c0ad45f58ab47c285fda9114/9942f16c4bf040edaba728be68c265d8.jpeg" alt="">
<div style="padding-top:75.0%;"></div>
</div>
</div>
<div class="start-button">
<button class="play-button ">
<i class="viewer-icon-play"></i>
<span class="label">3D</span>
</button>
</div>
<div class="watermark">
<a title="View on Sketchfab" data-action="watermark" href="https://sketchfab.com/3d-models/arc-de-triomphe-photogrammetry-65937fd27de647c0a8ac99ce8275c03e" target="_blank"></a>
</div>
</div>
<div class="overlays">
<div class="overlay help hidden">
<a href="#" class="close viewer-icon-close" aria-label="close"></a>
<div class="inner">
<ul class="tabs">
<li class="active"><a href="#" data-target="basic">Navigation basics</a></li>
<li><a href="#" data-target="all">All controls</a></li>
</ul>
<div class="tabs-container" aria-hidden="true">
<div class="tab active" data-tab="basic">
<div class="tip">
<div>
<i class="viewer-icon-refresh"></i>
</div>
<div>
<b>Orbit around</b>
<div>
Left click + drag or<br>
One finger drag (touch)
</div>
</div>
</div>
<div class="tip">
<div>
<i class="viewer-icon-search-plus"></i>
</div>
<div>
<b>Zoom</b>
<div>
Double click on model<br>
or scroll anywhere or<br>
Pinch (touch)
</div>
</div>
</div>
<div class="tip">
<div>
<i class="viewer-icon-arrows"></i>
</div>
<div>
<b>Pan</b>
<div>
Right click + drag or<br>
Two fingers drag (touch)
</div>
</div>
</div>
</div>
<div class="tab" data-tab="all">
<div>
<div class="section">
<span class="title">Orbit navigation</span>
<b>Move camera:</b> 1-finger drag or Left Mouse Button<br>
<b>Pan:</b> 2-finger drag or Right Mouse Button or <kbd>SHIFT</kbd>+ Left Mouse Button<br>
<b>Zoom on object:</b> Double-tap or Double-click on object<br>
<b>Zoom out:</b> Double-tap or Double-click on background<br>
<b>Zoom:</b> Pinch in/out or Mousewheel or <kbd>CTRL</kbd> + Left Mouse Button<br>
</div>
<div class="section rendering-shortcuts"></div>
<div class="section inspector-shortcuts"></div>
<div class="section general-shortcuts"></div>
<div class="section">
<span class="title">Lighting</span>
<b>Rotate lighting:</b> 3-finger drag or <kbd>ALT</kbd> + Left Mouse Button<br>
<b>Rotate env. only:</b> <kbd>ALT</kbd> + <kbd>SHIFT</kbd> + Left Mouse Button<br>
</div>
<div class="section annotation-shortcuts"></div>
<div class="section animation-shortcuts"></div>
<div class="section sound-shortcuts"></div>
<div class="section">
<span class="title">First-person navigation</span>
<b>Move:</b> <kbd>↑</kbd>,<kbd>←</kbd>,<kbd>↓</kbd>,<kbd>→</kbd> (or <kbd>W</kbd>,<kbd>A</kbd>,<kbd>S</kbd>,<kbd>D</kbd>)<br>
<b>Look around:</b> 1-finger drag or Left Mouse Button<br>
<b>Adjust speed:</b> Mousewheel<br>
</div>
</div>
</div>
</div>
<div class="action">
<button class="button" data-action="reset-camera">Reset camera view</button>
</div>
</div>
</div>
<div class="overlay share hidden">
<a href="#" class="close viewer-icon-close" aria-label="close"></a>
<div class="inner">
<div class="share-link">
<div class="text-field">
<label for="copy-link-field">Link</label>
<input id="copy-link-field" type="text" class="text" value="" readonly="">
<button data-clipboard-target=".text-field .text">copy</button>
</div>
</div>
<div class="share-social">
<a data-action="share-on-facebook" target="_blank"><i class="fa-brands fa-facebook"></i></a>
<a data-action="share-on-twitter" target="_blank"><i class="fa-brands fa-twitter"></i></a>
<a data-action="share-on-reddit" target="_blank"><i class="fa-brands fa-reddit"></i></a>
<a data-action="share-on-tumblr" target="_blank"><i class="fa-brands fa-tumblr"></i></a>
<a data-action="share-on-linkedin" target="_blank"><i class="fa-brands fa-linkedin"></i></a>
<a data-action="share-on-pinterest" target="_blank"><i class="fa-brands fa-pinterest"></i></a>
<a class="share-mail" target="_blank"><i class="viewer-icon-envelope"></i></a>
</div>
<div class="share-embed">
<a class="button" href="" target="_blank">
<i class="viewer-icon-code"></i> Embed
</a>
</div>
</div>
</div>
<div class="overlay hotspots-overlay hidden">
<a href="#" class="close viewer-icon-close" aria-label="close"></a>
<div class="inner">
<span class="hotspot-title"></span>
<div class="hotspot-content js-scrollable markdown-rendered-content"></div>
</div>
</div>
<div class="overlay ar ar-overlay-mobile hidden">
<i class="viewer-icon-close close"></i>
<div class="inner custom-scrollbar">
<div class="header-helper">
<p class="title">
Your device is not compatible
</p>
</div>
<div class="content-helper">
<div class="row-helper">
<div class="content-row">
<div class="info">
<p>
Your version of
<span class="mobilePlatform"> </span>
is too old to display models in AR.
</p>
<p>
<span class="mobilePlatform"> </span>
<span class="minVersion"> </span>
or newer is required.
</p>
<p>
<strong>
Update your device or try on another device.
</strong>
</p>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="overlay ar ar-overlay-desktop hidden">
<i class="viewer-icon-close close"></i>
<div class="inner custom-scrollbar">
<div class="header-helper">
<p class="title">
Augmented Reality is only available on mobile or tablet devices
</p>
<p class="subtitle">
Supported devices: iPhone 6S+ & iPad 5+ on iOS 12+ and Android 8.0+ with ARCore 1.9 support <br>
Open this page with such a device to experience AR.
</p>
</div>
<div class="content-helper">
<div class="row-helper">
<div class="content-row">
<canvas id="qrCode"></canvas>
</div>
</div>
<div class="row-helper ">
<div class="content-row">
<div class="text">
<p class="title">Open with QR Code:</p>
<p>Scan this code to open the model on your device, then, tap on the AR icon.</p>
<p class="title">Open this link with your mobile:</p>
<a class="url overlay-link" target="_blank" href="#" aria-label="Open AR on Mobile"></a>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="overlay ar ar-overlay-loading hidden">
<i class="viewer-icon-close close"></i>
<div class="inner">
<div class="sketchfab-spinner">
<svg viewBox="0 0 13 16" xmlns="http://www.w3.org/2000/svg">
<g fill-rule="nonzero">
<path class="shape1" d="M5.3029 8.1731L0 4.9864v5.8286l5.3029 3.1867z"></path>
<path class="shape2" d="M5.9987 6.9902l5.8157-3.495L5.9987 0 .1829 3.4953z"></path>
<path class="shape3" d="M6.6944 8.1731v5.8286l5.303-3.1867V4.9864z"></path>
</g>
</svg>
</div>
<div class="text">
LOADING...
</div>
<div class="subText">
If the loading takes too long, you can learn more
<a class="overlay-link" href="https://support.fab.com/s/article/App-free-AR" target="_blank" rel="noopener noreferrer">here</a>
</div>
</div>
</div>
<div class="overlay ar ar-overlay-error hidden">
<i class="viewer-icon-close close"></i>
<div class="inner">
<div class="content-helper">
<div class="row-helper">
<div class="content-row">
<div class="info">
<p>
AR is not available for this model yet.
</p>
<p>
Please try again later or contact us if the problem persists.
</p>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="overlay helper-vr-overlay hidden">
<i class="viewer-icon-close close"></i>
<div class="inner custom-scrollbar">
<div class="header-helper">
To view this model in virtual reality:
</div>
<div class="content-helper">
<div class="row-helper">
<div class="content-row">
<div class="image"><i class="viewer-icon-mobile"></i></div>
<div class="text">
<div class="title">on mobile phone</div>
<div>with Cardboard or similar</div>
</div>
</div>
<ul class="info">
<li>On your mobile, open this <a class="url overlay-link" target="_blank" href="#">link</a></li>
</ul>
</div>
<div class="row-helper">
<div class="content-row">
<div class="image"><i class="viewer-icon-desktop"></i></div>
<div class="text">
<div class="title">on desktop PC </div>
<div>with a VR headset</div>
</div>
</div>
<ul class="info">
<li><a href="https://immersiveweb.dev/" target="_blank" rel="noopener noreferrer nofollow" class="overlay-link">Learn more on the immersive web</a></li>
<li>On Chrome, follow the instructions <a href="https://immersiveweb.dev/chrome-support.html" target="_blank" rel="noopener noreferrer nofollow" class="overlay-link">here</a></li>
<li>Open this model</li>
<li>Click on the VR icon</li>
</ul>
</div>
</div>
<div class="footer-helper">
<a class="overlay-link" href="https://support.fab.com/s/article/Virtual-Reality-VR" target="_blank" rel="noopener noreferrer">
More info on Virtual Reality.
</a>
</div>
</div>
</div>
</div>
<div class="webgl">
<canvas class="canvas" data-modeluid="65937fd27de647c0a8ac99ce8275c03e" data-action="create-hotspot" aria-label="3D view of Arc de Triomphe - photogrammetry">
</canvas>
<div class="loading-container">
<div class="secondary-progress ">
<div class="secondary-progress-percentage"></div>
<div class="secondary-progress-display"></div>
</div>
<div class="main-progress ">
<img alt="Loading 3D Model" src="https://media.sketchfab.com/models/65937fd27de647c0a8ac99ce8275c03e/thumbnails/2a28add5c0ad45f58ab47c285fda9114/b5d188a8a6d54e119727d3617653c7e2.jpeg" class="loading-thumbnail">
<div class="main-progress-wrapper">
<div class="main-progress-percentage loading-percentage">0%</div>
<p>Loading 3D model</p>
<div class="main-progress-display">
<div class="main-progress-display__progress"></div>
</div>
</div>
</div>
</div>
<div class="hotspots"></div>
<div class="gui">
<div class="animation-not-supported hidden">
<a href="#" class="close" aria-label="close"></a>
<p>Model is too heavy for your device and can not be rendered properly</p>
</div>
<div class="hotspot-controls-responsive">
<div data-title="Previous Annotation" data-action="prev-annotation">
<div class="icon viewer-icon-caret-left"></div>
</div>
<div data-title="Next Annotation" data-action="next-annotation">
<div class="icon viewer-icon-caret-right"></div>
</div>
</div>
<div class="model-inspector">
<div class="model-inspector__menu">
<div class="model-inspector__minimize"><i class="viewer-icon-caret-down" aria-hidden="true"></i>Model Inspector</div>
<div class="model-inspector__content">
<div class="model-inspector__modes custom-scrollbar js-scrollable">
</div>
</div>
</div>
<div class="model-inspector__2D-options">
<div class="model-inspector__UV-options"></div>
<div class="model-inspector__material-options"></div>
</div>
<div class="model-inspector__empty-2d-view">
</div>
</div>
<div class="controls">
<div class="watermark">
<a title="View on Sketchfab" data-action="watermark" href="https://sketchfab.com/3d-models/arc-de-triomphe-photogrammetry-65937fd27de647c0a8ac99ce8275c03e" target="_blank"></a>
</div>
<div class="animation-controls widget ">
<div class="timeline ">
<div class="timeline-wrapper">
<div class="track">
<div class="bar">
</div>
<div class="knob">
</div>
</div>
</div>
</div>
<div class="animation-controls__buttons">
<a href="#" class="control play fa" aria-label="Play Animation"></a>
<a href="#" class="control next fa" aria-label="Next Animation"></a>
<div class="animation-timer control progress help" data-unit="time">00:00.00</div>
<div class="animation-list control has-menu">
<p class="animation-name"></p>
<div class="control-menu list">
<div class="animation__options">
<div class="toggle-button">
<span class="toggle-button__option tooltip" data-tooltip="Repeat one">
<input type="radio" name="animation-cycle" data-value="one" id="animation-cycle-one">
<label for="animation-cycle-one"><i class="viewer-icon-cycle-repeat-one"></i></label>
</span>
<span class="toggle-button__option tooltip" data-tooltip="Repeat all">
<input type="radio" name="animation-cycle" data-value="all" id="animation-cycle-all">
<label for="animation-cycle-all"><i class="viewer-icon-cycle-repeat-all"></i></label>
</span>
<span class="toggle-button__option tooltip" data-tooltip="No repeat">
<input type="radio" name="animation-cycle" data-value="none" id="animation-cycle-none">
<label for="animation-cycle-none"><i class="viewer-icon-cycle-no-repeat"></i></label>
</span>
</div>
<div class="toggle-button">
<span class="toggle-button__option tooltip" data-tooltip="Speed x0.1">
<input type="radio" name="animation-speed" data-value="0.1" id="animation-speed-point-one">
<label for="animation-speed-point-one">x0.1</label>
</span>
<span class="toggle-button__option tooltip" data-tooltip="Speed x0.5">
<input type="radio" name="animation-speed" data-value="0.5" id="animation-speed-point-five">
<label for="animation-speed-point-five">x0.5</label>
</span>
<span class="toggle-button__option tooltip" data-tooltip="Speed x1">
<input type="radio" name="animation-speed" data-value="1" id="animation-speed-one">
<label for="animation-speed-one">x1</label>
</span>
<span class="toggle-button__option tooltip" data-tooltip="Speed x2">
<input type="radio" name="animation-speed" data-value="2" id="animation-speed-two">
<label for="animation-speed-two">x2</label>
</span>
</div>
</div>
<ul class="js-scrollable"></ul>
</div>
</div>
</div>
</div>
<div class="hotspot-controls widget has-menu ">
<div data-title="Previous Annotation" data-action="prev-annotation">
<div class="icon viewer-icon-caret-left"></div>
</div>
<div class="hotspot-name default" data-action="toggle-annotation-list">
Select an annotation
</div>
<div data-title="Next Annotation" data-action="next-annotation">
<div class="icon viewer-icon-caret-right"></div>
</div>
<div class="list hotspots-list"></div>
</div>
<div class="general-controls widget ">
<a class="control tooltip help" data-tooltip="Help">
<i class="viewer-icon-question"></i>
</a>
<a class="control volume" title="Volume (M)" draggable="false">
<i class="viewer-icon-volume-up"></i>
<div class="volume-menu">
</div>
</a>
<a class="control tooltip settings has-menu " data-tooltip="Settings">
<i class="viewer-icon-gear"></i>
<div class="control-menu settings-menu">
<div class="control-menu-wrapper">
<div class="control-menu-list"></div>
<div class="control-menu-pane"></div>
</div>
</div>
<span class="control-badge"></span>
</a>
<a class="control tooltip inspector" data-tooltip="Model Inspector (i)" data-action="inspector">
<i class="viewer-icon-inspector"></i>
</a>
<a class="control tooltip vr " data-tooltip="View in VR">
<i class="viewer-icon-vr"></i>
</a>
<a class="control tooltip tooltip-right-bound fullscreen --always-visible" data-tooltip="Fullscreen (f)">
<i class="viewer-icon-fullscreen"></i>
</a>
</div>
</div>
<div class="viewer-hint widget disabled">
<div class="viewer-movehint">
<i class="icon"></i>
<span class="label"></span>
</div>
</div>
</div>
</div>
<div class="osd widget">
<div class="osd-content">
</div>
</div>
<div class="fallback" style="display: none">
<div class="fallback-viewport">
<img src="" alt="Arc de Triomphe - photogrammetry 3D Model" class="fallback-sprite">
</div>
<div class="fallback-warning">
<div class="inner">
<h3>Arc de Triomphe - photogrammetry 3D Model</h3>
<p data-nosnippet="">
Something went wrong with the 3D viewer.<br>
<a href="https://support.fab.com/s/article/Compatibility" target="_blank" rel="noopener noreferrer">Learn how to fix it here</a>.
</p>
</div>
</div>
<div data-nosnippet="" class="fallback-error fallback-error-loading">
<div class="inner">
<p>Connection error. Please try again.</p>
</div>
</div>
<div data-nosnippet="" class="fallback-error fallback-error-nofallback">
<div class="inner">
<p>Sorry, the model can't be displayed.</p>
<p>Please check out <a href="https://support.fab.com/s/article/Compatibility" target="_blank" rel="noopener noreferrer">our FAQ</a> to learn how to fix this issue.</p>
</div>
</div>
<div class="progress-bar">
<div class="progress-bar-percentage"></div>
<div class="progress-bar-display"></div>
</div>
<div class="progress-circle">
<div class="progress-circle-percentage loading-percentage"></div>
<svg class="progress-circle-display" version="1.1">
<path class="progress-circle-path" fill="none" stroke="#1caad9" stroke-width="6"></path>
</svg>
</div>
<div class="controls">
<div class="control control-fullscreen fullscreen tooltip tooltip-left" data-tooltip="Fullscreen (f)" data-action="fullscreen">
<div class="icon viewer-icon-fullscreen"></div>
</div>
</div>
</div>
<div data-nosnippet="" class="embed-sandboxed-message">
<p>It looks like your browser or this site is blocking some scripts or cookies necessary to properly display the viewer.</p>
<p>View this model on Sketchfab :<br><a href="https://sketchfab.com/models/65937fd27de647c0a8ac99ce8275c03e/embed">https://sketchfab.com/models/65937fd27de647c0a8ac99ce8275c03e/embed</a></p>
<p>Or visit the Help Center for more information:<br><a href="https://support.fab.com/s/article/Compatibility" target="_blank" rel="noopener noreferrer">https://support.fab.com/s/article/Compatibility</a></p>
</div>
</main>
<p>Geometry and texture/color in one workflow.</p>
<p>Affordability and flexibility. Depending on the end use application almost any camera will work given there is enough light and your post processing software is robust.</p>
<p>Real time feedback and processing as models improve. <a href="https://mars.nasa.gov/technology/helicopter/#">Ingenuity Drone</a></p>
<p><img src="img/lidar-vs-photogrammetry-drone.jpg" alt="Drone imaging"></p>
# Key Challenges
# Tools
# Apps
# Camera Equations