Agisoft PhotoScan is a stand-alone software product that performs photogrammetric processing of digital images and generates 3D spatial data to be used in. Digital Surface and/or Digital Terrain Model — depending on the project. Georeferncing based on EXIF meta data/flight log: GPS/GCPs data. EPSG registry. New users can try Agisoft Metashape software either in demo mode (export and save If you are updating from PhotoScan Professional edition version x or.
Battlefront which I wrote about a while ago. This comprehensive review focuses on using PhotoScan for capturing objects of all sizes, using various single-camera setups. Expert Tips I realize that my reviews are being read by beginners and advanced users alike.
Hope you like! You can check the complete list of differences between the two here. For me and the current purpose and target audience of this very blog the main difference is scalability, namely network processing. The other difference that interests me is the ability to generate and auto-detect markers, which I will cover later. Short version: And you can always upgrade to Pro later for the price difference.
If you want to capture objects […] the Standard version is probably good enough PhotoScan is available for Windows but also for Mac and Linux, while the Mac version of ReMake has been discontinued. Using the markers is totally optional and only works with the Pro version of PhotoScan. I used a 7 year old entry-level megapixel Canon EOS D Rebel T2i in the US with kit lens, but you can use any camera for the Foldio, you do need one that can be triggered with an infrared remote.
You can also go for white or any other color but I wanted to prevent having to color-correct the photos and use the JPGs straight from the camera for efficiency. The amount of RAM in the system is the main bottleneck for the amount and resolution of photos PhotoScan can process, at least in a single chunk. Processing Times You might notice that I make no mention of processing times in this review.
Generally though, my experience is that local processing with Autodesk Remake is faster than with Agisoft PhotoScan. Generating the dense cloud is a time consuming task with PhotoScan, especially at Ultra High quality. Adding more photos resulted in a decrease in system responsiveness up to the point where it would lock up completely. So for single-chunk processing more about chunks later my system is best suited for small to medium objects.
I plan to create a separate post about the exact differences in processing speed between PhotoScan and other photogrammetry software like ReMake and RealityCapture in the near future.
Expert Tip: The first thing you can try is tuning the brightness of the photos individually or the entire chunk to remove shadows. Or import mask images created in an external program like Photoshop. You can either create a general mask a. The latter can be a sequence of black-and-white mask images to pair with each photo, the alpha channel stored within the photos themselves or a photo of only the background. By using markers see next paragraph PhotoScan is far less likely to be confused by details in the background.
The first step here is aligning the photos and generate a sparse point cloud. All cameras were successfully aligned. All camera positions and markers are shown. This could be a life-saver for complex projects.
This is especially great to do outdoors with natural light but avoid direct sunlight. I find resizing the Region bounding box to be a very tricky task — especially with outdoors shoots that have a lot of background information. In some occasions, PhotoScan did automatically size the Region to fit around the object in front of the cameras, but more often this was not the case.
A new Scale Bar will appear in the Reference pane on bottom left of the interface where you can set the distance between the two markers. After clicking the Update button, the model is scaled correctly. The next step is generating a Dense Point Cloud.
The quality setting you choose for this greatly impacts the processing time and final quality of the result. The default is High, which is very good. I find resizing the Region bounding box to be a very tricky task. Converting the Dense Cloud to a polygonal mesh can also be done with various quality settings and PhotoScan neatly estimates the resulting polycount. Alternatively, you can set a custom target polycount. Even with the highest setting I was surprised by how fast the meshing is performed.
Texturing The resulting mesh has color information but at this stage this is stored as per-vertex color information within the 3D surface. Depending on the polycount the level of detail can already be quite good but if you want to get the best color quality you can generate a separate UV texture map. You can click the images below for the full-res textures.
But I really like that PhotoScan generates big UV islands instead of a gazillion of small ones that some other programs come up with. If you put your mind to it, you can simply edit these in Photoshop. Advanced Mesh and Texture Editing After mesh generation, PhotoScan has a build-in tool for decimation as wel as a Gradual Selection Tool to quickly select and delete small meshed parts that are not connected to the main object.
Unlike ReMake, PhotoScan cannot decimate a mesh and generate normal or displacement maps from the high-poly version. Photoscan also has no sculpt tool like ReMake. However, the upside is that unlike ReMake, PhotoScan allows you to export the mesh, edit it externally, and re-import it. This way you can control the retopology in a program of choice like zBrush but still use PhotoScan to generate a high-resolution texture.
When doing this, PhotoScan can preserve the UV layout generated by the external program. PhotoScan cannot decimate a mesh and generate normal or displacement maps from the high-poly version. Where the former is a one-click approach with very few settings, the latter offers fine control over every step in the photogrammetry process.
But if you start every step in the workflow above manually, you will lose a lot of time when process has finished and you need to start the next one yourself. By creating a Batch, you can pre-define all steps you want PhotoScan to take and the settings it need to use for each step. These are just a few actions you can add to the Batch. Guess that takes some experience to do educated guesses. Chunks Photogrammetry, and 3D reconstruction in general, is a very computer intensive task.
For instance, the amount of photos you can process depends largely on the amount of RAM in your machine. Basically, you make logical groups of photos that cover a certain continuous area of the object or environment. Then you process that part like I did in this review. And when all Chunks are meshed, you can align them and fuse everything into one single object that you can export.
Results Warning: They will probably not be the favorite thing to display on light systems and are certainly not optimized for tablets and smartphones.
There were no issues with processing the photos from this setup. I did an Ultra High version in the next section. Interestingly, PhotoScan was unable to distill the details on the very top of the head of the bust, even with all modes set to their highest accuracy.
But the amount of photos is 9 instead of 16 with the turntable. Also, ReMake had no problem with the top of the head with this amount of photos. I made no additional down-facing photos. That can than be used to make a shader for a low-poly version. The vintage camera below actually has an interesting bottom plate. I did this tuning the lights and camera exposure until the background was totally white. This way I could keep the camera in the same location and rotate the object between cycles.
And it worked! All photos were aligned nicely: The only editing I did was adjust the exposure levels of the texture in Photoshop to compensate for the over-exposed photos.
The viewfinder on top is even glossy black and apart from some geometric noise that did come out very well. Also nice it that the levers on the lens, which are really tiny, rendered beautifully.
I used a monopod and controlled my Sony RXM2 And while ReMake had no problems with that , PhotoScan again had issues with the very low amount of photos from the top highlighted which resulted in a hole in the model. The Hole Filling algorithm did close the hole but with very few polys. And unlike ReMake, PhotoScan has no option of subdividing selected polygons to create a polygon density that better matches the rest of the model.
Update 29 May Teddy Forgot to include Teddy when I published this review. Thanks to everyone that reminded me of this! In fact, it was a perfect test of the permanent Photogrammetry setup I made in my office.
PhotoScan performs best with a more professional studio setup and more ideal shooting circumstances. Verdict Using PhotoScan for single-camera object digitization. Agisoft PhotoScan is a great piece of software for professionals that want to have full control over the entire photogrammetry process.
Ultra High would be too much waiting for me. But this requires quite a lot of knowledge and experience to set-up correctly. The upside is that you can always see what PhotoScan is doing under the hood and learn from that, while ReMake gives no feedback about the process at all. You can export and import meshes mid-process to do editing in an application of your choice.
Algorithm-wise Agisoft PhotoScan can deliver outstanding results, even from older or entry-level cameras. Bottom line: This post has been updated after publishing to correct some typos, add the Teddy examples and the information panel about processing times.
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