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12 Best Photogrammetry Software For 3D Mapping Using Drones - DroneZon.Agisoft Metashape: Installer
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If you haven't been living under a rock for the last few years you have probably heard all the cool stuff that is going on with 3d printing. We are now capable of printing almost anything provided we have a 3d model to work from. There are many ways to make a 3d model, but one of the coolest is to 3d scan an existing object.
With a 3d scan and the right printer you can reproduce any object at any size from a house to an earring. You can also use the scan as a starting point for a new creation. Think of everything you can do with a picture in Photoshop. Now you can do that in 3d with real stuff as well. The most amazing thing about 3d scanning is that you probably already own the best tool there is for it. It might be in your pocket, or you may be staring at it as we speak so to speak.
This tool, which will allow you to capture the world in amazing 3d, is a simple camera. Combined with a little technique and some inexpensive or even free software , your camera becomes the world's most versatile 3d scanner.
Stay tuned and I'll show you how. Throughout this instructable you will find embedded 3d scans which you can explore thanks to our friends at Sketchfab. Just click on the white triangle to start , then you can experience the scan in 3d. If you want to learn more about 3d scanning and printing be sure to check out my podcast " 3d Printing Today ".
Its available on iTunes and Stitcher. The concept is simple. You take a bunch of photos of an object you want to capture. Every part of the object must appear in at least 3 photos to be captured. The photos are fed to a program which identifies individual spots on the object and, though a combination of trigonometry and dark magic , deduces their location in 3 dimensions.
By identifying enough of these spots sometimes literally millions of them the program is able to make a digital reconstruction of the object , suitable for amazing your friends, embedding in your latest video game, or, sometimes, 3d printing. Shooting the photos takes a bit of practice. You don't need to be the next Ansel Adams, but it is helpful if your photography experience goes beyond shooting selfies.
The software is pretty easy to get started with. Most of the free packages don't offer many options which makes them easy to use when they work.
The more sophisticated systems can take as much time and money as you want to give them, but can reward you with amazing results. That is my startlingly unqualified answer. But naturally some cameras will work better than others. The ideal camera would produce crystal clear, tack sharp, perfectly exposed, undistorted, high resolution photos under any conditions.
Unfortunately we don't have such a camera yet, but we are getting close. Here are some different types of camera along with a scan made with photos shot with each type. You can click on each scan and explore it in 3d. This old school Nikon FM2 would theoretically work, but since you would need to shoot 5 rolls of film for a decent scan I'm not about to test it out.
Nikon FM2 by shapespeare on Sketchfab. DSLR's are still the gold star standard for photography and rightly so. They offer quality, versatility and control that you won't find anywhere else.
You don't need an expensive pro model to enjoy these advantages. I have shot most of my scan using a Newer and more expensive models may offer higher resolution which means more data, but it also means higher processing times. This is a useful feature, but only if you are trying to capture the absolute highest quality scans.
I scanned this beautiful carved panel while waiting in a hotel lobby in Orlando. I shot 49 pictures in challenging light with a Nikon D with the kit lens.
Buddist carved panel by shapespeare on Sketchfab. Point and shoot cameras and their mirror-less cousins have many of the advantages of DSLRs with a lower price tag. The ideal point and shoot would have a manual mode so you could really control your exposure.
Canon point and shoots have the added advantage of CHDK which is an open source firmware which you can optimize to your specific needs.
I met this charming chap in the lobby of the Miami Biltmore. His job seems to be to hold up the staircase which might explain his tired look. I shot 20 pictures with a Nikon Coolpix point and shoot. Biltmore Gargoyle by shapespeare on Sketchfab. Grab yer goPro, do something totally sick, post it to youTube and you too can be famous. But can you capture your antics in 3d at the same time? Most photogrammetry software doesn't play well with goPro. This has to do with the fisheye lens which distorts the image.
Recent versions of Agisoft photoscan have a special setting for fisheye lenses which works well, but it seem to be much slower than the regular algorithm. The latest GoPros have the advantage of a built in timelapse and burst modes which allows you to shoot automatically at rates from one frame a minute to 10 frames a second. This is useful because you can mount the camera on the end of a broom handle or a painter's roller extension and get high angle shots which would be difficult otherwise.
I used the burst mode on a Hero4 Silver to shoot 10 frames a second for 3 seconds. Perhaps my expression reveals the concentration required to do this while holding my head absolutely still. Since we need lots of photos of a subject from all angles a logical question is "What about video?
So all we should need to do is wave the camera around the subject as if we were painting it to capture all the photos we need. The pictures are taken so rapidly that it is almost impossible to not get enough overlap between them. It is a good idea in principle and it works in practice, just not that well. The resolution of video frames is nowhere near what still cameras produce. Most have tiny sensors and inexpensive optics which are optimized for shooting video, but they don't produce very sharp still images.
There may be a future for photo scans from video especially when we start to see affordable 6k and 8k cameras which can record uncompressed images. It might also be possible to optimize software to handle huge numbers of lower resolution images. It actually works and the results aren't as bad as I had expected.
The some of problems have to do with me not being a competent quad copter pilot. If you have a smart phone it may be the best place to start. Most modern phones come with a pretty deent camera and there are aftermarket camera apps which will give you better control. The real potential of the phone as scanner is in dedicated scanner apps. The power of the scanner app goes beyond just taking the photos.
For instance, the dCatch app from Autodesk uses your phone's sensors to measure what direction you are pointing your camera and to coach you through making a good scan. Then the app up loads your photos to their server for processing. You might not want to do this on your data plan, but it could be a handy feature on wifi. A short coming of the current dCatch is that it doesn't save the photos to your phone at least the android version I used didn't.
If or I should say when something goes wrong with the scan you don't have easy access to the photos to try something else. This is a scan of one of my anvils which I shot with a Samsung Galaxy S5 using the stock camera app.
I shot 74 photos and processed them with Agisoft. Anvil scanned with Galaxy S5 by shapespeare on Sketchfab. When you are getting started the best camera to use is the best camera you have. The DSLR is the gold standard. If you want to buy a camera for serious photo scanning, or serious photography in general, this is what you want. But remember, what it comes down to is the quality of your photos, not the quality of your camera.
With the right skills and the right conditions you can take good photos with a bad camera. But if you don't know what you are doing, it is easy to take bad photos with a good camera. If you want to invest in something, invest in your skills as a photographer. The camera is only as good as the photographer behind it. Photo scanning something difficult, like this scan I made of the eye of a needle, requires a pretty good understanding of both photography and photogrammetry. Eye of a Needle by shapespeare on Sketchfab.
A shoe is a great first scan. Pick something simple and practical, nothing glittery that screams "take me to Las Vegas". Put your subject on a stool or a box so you don't have to crawl around shooting it on the ground. I set this teapot on top of my tripod so I could shoot it comfortably.
Make sure you have good lighting. If you can swing it, working outdoors on an overcast day is perfect. You get lots of nice even diffuse light. If you need to shoot indoors set up as much light as you can and make it as diffuse as possible.
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