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==Presentation by his founder ==
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== Introduction ==
  
This is the documentation of a set of software photogrammetric tools that, under certain conditions,
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MicMac is a free open-source ([https://en.wikipedia.org/wiki/CeCILL Cecill-B licence]) photogrammetric suite that can be used in a variety of 3D reconstruction scenarios. In aims mainly at professionnal or academic users but constant efforts are made to make it more accessible to the general public.  
allow to compute a 3D modelization from a set of images.
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MicMac is a tool for image matching. I began to write it in 2005, while working at the French National
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One of MicMac strengths is its high degree of versatility. It can indeed be used in various fields : cartography, environment, industry, forestry, heritage, archaeology,...
Geographic Institute (IGN), as a tool integrating several recent results of the scienti�c community. It is
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a general purpose tool, probably in many (if not all) speci�c contexts, one will be able to �nd a more
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MicMac allows both the creation of 3D models and of ortho-imagery when appropriate.  
accurate tool. However, one of its expected advantages is its generality. It has been used in a lot of
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di�erent contexts, for example:
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The software is suitable to every type of objects of any scale : from small object or statues with acquisition from the ground, to church, castle through drone acquisitions, to buildings, cities or natural areas through aerial or satellite acquisitions. The tools also allow for the georeferencing of the end products in local/global/absolute coordinates system. Some complementary tools opens the fields of metrology and site surveying.
| digital terrain model in rural context from pairs of satellite images, with exact or approximate
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orientation;
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To discover MicMac, its environment, its philosophy and the main tools it offers: [http://download.springer.com/static/pdf/241/art%253A10.1186%252Fs40965-017-0027-2.pdf?originUrl=http%3A%2F%2Fopengeospatialdata.springeropen.com%2Farticle%2F10.1186%2Fs40965-017-0027-2&token2=exp=1496754285~acl=%2Fstatic%2Fpdf%2F241%2Fart%25253A10.1186%25252Fs40965-017-0027-2.pdf*~hmac=06e4aa9ab6253649cb5b66085279293fe869176cc5baacf8bc4b0b89a023db67]
| digital elevation model in urban context with high resolution multi-stereoscopic images;
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| detection of terrain movements;
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To access the MicMac reference documentation : [https://github.com/micmacIGN/Documentation/blob/master/DocMicMac.pdf]
| 3D modelization of objects (sculptures) or interior and exterior scenes;
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| multi-spectral matching of images registration.
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== Examples ==
Of course this generality comes with a price . . . : it requires a lot of parameterization which sometimes
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These are some examples of surveys were MicMac was used for the photogrammetric processing.
turns to be quite complex. For 3D computation, MicMac works only with oriented images like the ones
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resulted from classical aero-triangulation process. Early in 2007, there were several opportunities that
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=== Digitizing the castle of Chambord ===
encouraged me to create a tool that could orientate a set of overlapping images, so that they can be
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Two survey campaigns of two weeks were organised in Chambord castle during the autumns of 2014 and 2015 in order to digitize this national heritage monument. These surveys were conducted by students of the [http://www.ensg.eu/ ENSG] PPMD master as educational fieldwork. The following methods were used there : laser scanning, photogrammetry, topography, geodesy, remote sensing, etc... The student have for example surveyed the fronts of the castle :<br>
matched in MicMac:
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<center>
| I bought my �rst re
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[[Image:ApericloudChambord.jpg|x200px]][[Image:Front_ortho.png|x200px]][[Image:Front_depthmap.png|x200px]][[Image:Front_depthmapshade.png|x200px]]<br>
ex digital camera, and thought it would be fun to be able to make 3D models
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</center>
from my holidays pictures, which turned to be right;
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| I discovered the existence of the magical SIFT algorithm from David Lowe, and thought this would
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=== 3D modelization of Mourres site ===
make this idea feasible by solving the tie point problem, which turned to be right;
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Here are some results from a project made by [http://www.ensg.eu/ ENSG] students, at Forcalquier. Ground acquisition and from UAV.
| I had already written several pieces of software, including some calibration tools, which could be
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Photogrametric workflow was made on Micmac, and the layout on QGIS.
reused and made me think it could be done easily and quickly, which turned to be wrong . . .
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<center>
Since 2008, several tools were added to solve speci�c requirements: tools for ortho-photo, tools for
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[[Image:Mourres1.jpg|x200px]] [[Image:Mourres2.jpg|x200px]] [[Image:MourresDroneOblique.jpg|x200px]][[Image:MourresOrtho.jpg|x250px]] [[Image:MourresMNE.jpg|x250px]]<br>
demosaicing. . . Since 2007, MicMac is an open source software, under the CeCILL-B license (an adaptation
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{{#ev:youtube|https://youtu.be/es3RByteOu0|500x300px}} <br>
to the French law of the L-GPL license); as far as I understand law (not very much) all the other
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</center>
tools described in this document are extensions and evolutions of MicMac and obey to the same license.
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Di�erent people have helped me in writing these tools:
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=== Canopy Survey ===
| Gregoire Maillet for supporting satellite orientation models (grid of rpc),
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A UAV-survey was organised in Grand-Leez in Belgium by l’Unité Gestion des Ressources Forestières et des Milieux Naturels (GRFMN), Université de Liège. The aim of this survey was to generate a DCM (Digital Canopy Model) for forestery applications.
| Arnaud Le Bris for adaptation of Sift++ supporting large images,
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<center>
| Didier Boldo for the �rst Windows adaptation,
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[[Image:Canopy DEM.png|x200px]]
| Aymeric Godet and Livio de Luca for developing two di�erent user friendly interfaces and also
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making many tests,
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| Christophe Meynard for solving some tricky Linux problems,
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| Christian Thom for the �rst idea of multi-correlation,
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| Jean-Michael Muller for improvements about installation,
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| Ana-Maria Rosu for many typo corrections (alas, I can create them faster than she can correct
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them).
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Version actuelle en date du 6 juin 2017 à 14:14

Introduction

MicMac is a free open-source (Cecill-B licence) photogrammetric suite that can be used in a variety of 3D reconstruction scenarios. In aims mainly at professionnal or academic users but constant efforts are made to make it more accessible to the general public.

One of MicMac strengths is its high degree of versatility. It can indeed be used in various fields : cartography, environment, industry, forestry, heritage, archaeology,...

MicMac allows both the creation of 3D models and of ortho-imagery when appropriate.

The software is suitable to every type of objects of any scale : from small object or statues with acquisition from the ground, to church, castle through drone acquisitions, to buildings, cities or natural areas through aerial or satellite acquisitions. The tools also allow for the georeferencing of the end products in local/global/absolute coordinates system. Some complementary tools opens the fields of metrology and site surveying.

To discover MicMac, its environment, its philosophy and the main tools it offers: [1]

To access the MicMac reference documentation : [2]

Examples

These are some examples of surveys were MicMac was used for the photogrammetric processing.

Digitizing the castle of Chambord

Two survey campaigns of two weeks were organised in Chambord castle during the autumns of 2014 and 2015 in order to digitize this national heritage monument. These surveys were conducted by students of the ENSG PPMD master as educational fieldwork. The following methods were used there : laser scanning, photogrammetry, topography, geodesy, remote sensing, etc... The student have for example surveyed the fronts of the castle :

ApericloudChambord.jpgFront ortho.pngFront depthmap.pngFront depthmapshade.png

3D modelization of Mourres site

Here are some results from a project made by ENSG students, at Forcalquier. Ground acquisition and from UAV. Photogrametric workflow was made on Micmac, and the layout on QGIS.

Mourres1.jpg Mourres2.jpg MourresDroneOblique.jpgMourresOrtho.jpg MourresMNE.jpg


Canopy Survey

A UAV-survey was organised in Grand-Leez in Belgium by l’Unité Gestion des Ressources Forestières et des Milieux Naturels (GRFMN), Université de Liège. The aim of this survey was to generate a DCM (Digital Canopy Model) for forestery applications.

Canopy DEM.png