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OpenDroneMap – Simple Images into 3D
- wongarsu 8y agoInteresting point: while the software is free, the web interface (webodm) seems to have a paid service integrated to process the images in the cloud (webodm lighning [1]). Since resource demands seem quite high (lots of RAM for larger image sets) this looks attractive and seems like a good way to finance an open source project. 1: https://webodm.net/ https://webodm.net/
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- jcims 8y agoAre there editors that allow you to manipulate point clouds or ‘digital surface models’? (Not sure what those are) I’d like to use something like this to digitize my property and model changes to it (building, landscaping, etc).
- pierotofy 8y agohttps://www.danielgm.net/cc/ https://www.danielgm.net/cc/
- jcims 8y agoNice! Thanks!
- Dangeranger 8y agohttps://rapidlasso.com/ https://rapidlasso.com/
- snarfy 8y agoMaple - https://3d.bk.tudelft.nl/liangliang/software.html https://3d.bk.tudelft.nl/liangliang/software.html PolyFit - https://3d.bk.tudelft.nl/liangliang/publications/2017/polyfit/polyfit.html https://3d.bk.tudelft.nl/liangliang/publications/2017/polyfi...
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- jcvhaarst 8y agoWhat kind of image quality would one need to get something useful out of this. Useful : Create a 3d model of a house with surrounding trees, so I can see the effect of those trees on a planned solar installation. Or create a 3d model of a garden to see where the sun and shadow are over the course of the year.
- fsloth 8y agoThe better the photograph, the better the output quality. Photogrammetric output will always have noise. Some materials don't really contain any surface details that the algorithms could use to attach feature points to, so they will be blank. Large white walls and large windows are especially difficult. Don't crop the photos. Prefer slight underexposition. For each detail you want to capture, have it visible at least in three photos. Capture photos from different position (ie. rather move yourself than just turn the camera) with at least 30% - 50% overlap between photos. You can find lots of tutorial in the internet. Search term that hits gold is 'photogrammetry tutorial'. For example: https://medium.com/realities-io/getting-started-with-photogrammetry-d0a6ee40cb72 https://medium.com/realities-io/getting-started-with-photogr... If you just want to try out the technique, I suggest you download the free test version of Zephyr 3D. You can just give it a bunch of photos and it does a fairly sane ops with the default options. https://www.3dflow.net/3df-zephyr-pro-3d-models-from-photos/ https://www.3dflow.net/3df-zephyr-pro-3d-models-from-photos/ If you like it, you can start experimenting with free and commercial tools including the one in the topic of this thread (see my other post in this thread for some other photogrammetric tools). If you have a large set of photos you will start to need a fairly beefy computer with tens of gigs of RAM the least. But, you can get pretty nice results for e.g. just a single house with just a regular modern desktop PC.
- unbearded 8y agoI would say the quality is relative to your input and to what type of application you need results for. If you are gonna use the pointcloud as a cheaper and faster alternative to LIDAR and need to take measures with centimeter precision, you will need a lot of overlap (we use 75%) and the drone to take the photos automatically to be sure it covers most of the desired area. I would also recommend a commercial tool for the task. We have jobs that take one week to process with state of the art hardware. But if you just want to do it for fun, you won't need to get this complicated and can do even with your phone.
- fsloth 8y agoIt would be nice to know how this compares with other open source and commercial photogrammetric offerings. Free: - AliceVision https://alicevision.github.io/ https://alicevision.github.io/ - Colmap https://colmap.github.io/ https://colmap.github.io/ - etc. Commercial: - Agisoft Metashape (formerly Photoscan) https://www.agisoft.com/ https://www.agisoft.com/ - Zephyr 3D https://www.3dflow.net/3df-zephyr-pro-3d-models-from-photos/ https://www.3dflow.net/3df-zephyr-pro-3d-models-from-photos/ - Drone deploy https://www.dronedeploy.com/ https://www.dronedeploy.com/ - etc etc etc See also: https://en.wikipedia.org/wiki/Photogrammetry https://en.wikipedia.org/wiki/Photogrammetry https://en.wikipedia.org/wiki/Structure_from_motion https://en.wikipedia.org/wiki/Structure_from_motion
- M4v3R 8y agoI used both ODM and Drone deploy and was amazed at the results that Drone deploy gave me. ODM results were unfortunately poorer (the generated models were far less detailed) plus it took a loong time to analyze few hundred pictures on my laptop, while Drone deploy model was ready pretty quickly. So while I love good open source software, it feels that ODM has still long way to go.
- unbearded 8y agoAt work, we tried DroneDeploy and Agisoft, but we settled with Pix4D, expensive, but we got better accuracy and the people who operate the drones found it easier to use.
- mohaine 8y agoWe are using ODM for generating orthomosaic photos and it produced better results than the commercial offerings we have seen (In some cases MUCH better). Note this did require us to tweak the settings some but overall it was pretty easy process. Things of Note: 1) ODM didn't quite scale as well to very large number of photos. (I think this may have been fixed now). 2) Our use case was pretty brutal. ~1 cm resolution photos of a mostly uniform row crop fields. Some of the other tools were really bad at not rotating the rows 90 deg in parts of the field. 3) I was in on the POC and selection process but not the production runs so I'm not sure how things have changed over the last year. 4) Some of the comparisons where with different photos (Looking at a custom full path) 5) We didn't look at 3d much at all, but it was pretty cool to be able to see 3d tractor tire marks across and freshly planted field. The 3d quality would really fall off at the edges when there was less overlap. I think it was only good in relative hight as well but our tests were very flat.
- yeldarb 8y agoI assume this uses GPS data to help with stitching the photos together. Do drones capture orientation data beyond GPS position (for example, pitch, yaw, gimbal direction)? I have tried adding motion graphics to some of my drone videos in After Effects but as far as I can tell it discards all of the metadata and infers the camera position based solely on the video frames. This is really slow and imprecise; I’ve been wondering if there’s a plug-in that will use the recorded telemetry from the drone to set the camera orientation.
- kaennar 8y agoIn the lab I work in we have internal tools for doing something like this for precision agriculture, but I have never heard of an open source solution. UAVs generally don't record their orientation or GPS data without setting up a separate log file (I have no idea how you do this on Pixhawks. We use BYU's autopilot or our own autopilot).
- unbearded 8y agoDJI drones stores that on the image itself. No need to use the logs.
- ViktorV 8y agoI don't think it uses GPS for that. You can match two partially overlapping images. From the movement of the feature points in the overlapping areas you can calculate your camera orientation, and thus the 3d point cloud of feature points ( or something close to this ). I think it is called structure from movement, the readme links a paper, maybe it's worth reading for you.
- yeldarb 8y agoInteresting, is there a technical reason for not using that extra data to help with the process? For example, another commenter mentioned > Some materials don't really contain any surface details that the algorithms could use to attach feature points to, so they will be blank. Large white walls and large windows are especially difficult. Seems like you might be able to position some of these with orientation data from the camera.
- linsomniac 8y agoThis morning I was watching a "video editing" youtube video where he made a 3D terrain object to load into Davinci Resolve (commercial but free for personal use), and track to the palm of his hand so it looked like the terrain was floating above his palm. He used http://terrain.party/ http://terrain.party/ to get height information as an image (lighter colors are high, darker are low), then a script scrape together images from Google Maps, which he transformed using the height information. At that point he was using a GUI to view the resulting 3D object and manipulate the camera and lighting. Blew my mind. I followed it part of the way, but got stuck with getting the google images. He was doing a valley close to an object recognizable from space close to the coast, I was trying to find the cabin we stayed at last weekend in rural Colorado. Pretty mindblowing what you can do with free video editing software today. https://www.youtube.com/watch?v=qP6wVajeI_M https://www.youtube.com/watch?v=qP6wVajeI_M
- mavhc 8y agoGoogle Earth Pro is now free, and has an export high res image function
- andrey-g 8y agoNot that high -- 4800 x 2848 is the max resolution.
- SahAssar 8y agoThat's a really roundabout way to do that though... He's basically taking free height data, converting it to a raster image, and then approximating it in the editor (which tries to convert the raster heightmap back to a proper map). The actual satellite imagery might be harder to (legally) get (and he basically suggests removing the copyright notices in the video). It's cool that it works, but it's also the "wrong" way to go about it considering all the tools around to work with open, free GIS data.
- linsomniac 8y agoIndeed. I was stuck at getting the correct images for the area I had the height map for. My plan was to use the NAIP images, which I have sitting here on one of my computers, processed, and is free. But, I ran into some weirdness with Davinci Resolve where it was getting "Media Unavailable" for some frames of the video. Once I went down that rabbit hole, I was just tired of that video and wanted it done. So I didn't add a spinning 3D map of the area, just added some titles and music and called it a day. Agree that it's not cool to remove copyright.
- dwiel 8y agoDoes anyone have any experience with the ZED camera? They claim they can generate 3d maps down to 1cm resolution without LIDAR using these kinds of methods.
- Fission 8y agoThe ZED camera works by using two high-resolution RGB camera, finding matching points between the two, and using that to calculate depth. Because they are using high-resolution RGB cameras, they can generate very high resolution depth maps. However, this is also their main drawback; with just RGB images, depth map calculation will fail on texture-poor surfaces, such as plain white walls, because it's very difficult to match points. They are fundamentally performing photogrammetry with two cameras at a fixed distance.
- punnerud 8y agoYou can solve this edge case using a light source, with a method called “structured light”: https://en.m.wikipedia.org/wiki/Structured-light_3D_scanner https://en.m.wikipedia.org/wiki/Structured-light_3D_scanner
- truesy 8y agoUsed this pretty extensively, and followed their dev branches. FWIW if you want quality results the best option is Agisoft, on a GPU machine w/ some custom python to automate.
- mohaine 8y agoFWIW, ODM was slightly better quality than Photoscan in our tests. We only tested orthomosaics but ODM had less error to our ground control points (note we didn't feed the givens into these tests) and less aberrations.
- wensheng 8y agothis might be off-topic, but anyone know a good software for indoor use? i.e turning indoor images into indoor 3D models.