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  2. You could try CloudCompare, as this has an 'unwrap cylinder' function. You could then scale and measure a flattened version. Hope this helps. Tom
  3. hi all, we're writing some helper python and realised that in a RAW workflow the original-captures would contain the raw originals. But then we'd like to convert them to 16 bit Tiff before processing. Current practice would have those in the jpeg-exports dir which is slightly misleading but we could stick to that to avoid having yet another dir if raws are involved. So my questions are: 1) would you like original-captures to contact the captured images with their original name? (eg ND?_xxxx.NEF) 2) for raw images are you happy to have tiffs in jpeg-exports ? (actually they can be deleted after processing to save space but...) 3) if you choose a crop before processing - where is a standard place to store the x,y,w,h for that? 4) Some people will use image sets of targets like grey cards for corrections - we should probably have a standard calib_images dir for those! Cheers! Kirk
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  5. I have one of Dave's test ptms here if anyone wants to see one: http://marc.ecs.soton.ac.uk/rti/underwater-writing-page3-impressions.ptm
  6. You can also use our version of the PTM fitter - although I haven't used it with rtibuilder for a while - it is much faster with high-res images: https://github.com/kmartinez/rti/blob/master/ptmfit.zip?raw=true It was written to use our libVIPS libary by John Cupitt.
  7. and thanks for the mention Dave - I didn't see it until today sorry!
  8. Hi - we're making our 13th dome - so happy to help! and certainly not $24k!! see custom-imaging.co.uk
  9. Hello, Can anyone provide some advice on taking measurements of models once they are scaled, especially of curved surfaces? I realize it is relatively easily to measure planar surfaces in Agisoft, but how would I measure a curved surface? I am hoping to create models of sculptures of various sizes and materials. Is there another software besides Agisoft that may help with this? Thank you, Natalie
  10. Greetings! Our article "Two new ways of documenting miniature incisions using a combination of Image-Based Modelling and Reflectance Transformation Imaging" is available in Open Access at https://www.mdpi.com/720360. Best regards, Dag-Øyvind Solem and Erich Nau, Norwegian Institute of Cultural Heritage Research Abstract: Digital 3D documentation methods such as Image-Based Modelling (IBM) and laser scanning have become increasingly popular for the recording of entire archaeological sites and landscapes, excavations and single finds during the last decade. However, they have not been applied in any significant degree to miniature incisions such as graffiti. In the same period, Reflectance Transformation Imaging (RTI) has become one of the most popular methods used to record and visualize this kind of heritage, though it lacks the benefits of 3D documentation. The aim of this paper is to introduce two new ways of combining IBM and RTI, and to assess these different techniques in relation to factors such as usability, time-efficiency, cost-efficiency and accuracy. A secondary aim is to examine the influence of two different 3D processing software packages on these factors: the widely used MetaShape (MS) and a more expensive option, RealityCapture (RC). The article shows that there is currently no recording technique that is optimal regarding all four aforementioned factors, and the way to record and produce results must be chosen based on a prioritization of these. However, we argue that the techniques combining RTI and IBM might be the overall best ways to record miniature incisions. One of these combinations is time-efficient and relatively cost-efficient, and the results have high usability even though the 3D models generated have low accuracy. The other combination has low time- and cost-efficiency but generates the most detailed 3D models of the techniques tested. In addition to cost-efficiency, the main difference between the 3D software packages tested is that RC is much faster than MS. The accuracy assessment remains inconclusive; while RC generally produces more detailed 3D models than MS, there are also areas of these models where RC creates more noise than MS.
  11. After the coefficients are found for Hemispherical Harmonics, how does RTIBuilder determine the direction of the surface normal? Does the program assume the surface is diffuse and look for the maximal lighting direction? I have seen multiple articles (Manfredi et. al.) that state that HSH more precisely determines surface normal direction, but neither those articles nor their references seem to point to how the surface normals are actually calculated. Unlike PTM, there are potentially multiple places where the gradient could be zero and with 16 coefficients, those locations are not easily solved for. Thanks for any assistance!
  12. Does CHI have any recommendations regarding EXIF file modification in relation to managing single, sets, or groups of images? Thank you.
  13. Hi everyone, I've been looking at ways to store all of my photogrammetric models and the image data sets that go along with them. I'm trying to figure out the best way to package it all together and am curious how others are storing these often large file sets. Anyone willing to share their methods? Thank you
  14. Two common options include: Texture laser model inside photogrammetry software Export the photogrammetry model Align the laser model to the photogrammetry model Import the aligned laser model into the photogrammetry software and generate the texture. Texture baking Export the textured photogrammetry model Align the laser model Bake the texture from photogrammetry to laser model The photogrammetry mesh needs to be accurate enough for alignment with the laser model. As long as the camera alignment is good the texture map should be good as well even if the photogrammetry mesh has some defects from shiny/featureless surfaces.
  15. I'm really new to photogrammetry, i mean I have newer used it, so forgive me for a newbie question. I've been using 3d scanners for almost 2 years and it is good for geometry and it was enough for a long time. But now I've changed my job to digitize statues and other art. The scanners I use (It's a combination of Artec Eva and Artec Spider if this makes sense) do capture textures but their quality in far not enough for digitizing art. I know, that photogrammetry can provide very good textures so it might be a solution. My idea is to use 3d scanning for geometry and photogrammetry for textures. Are there any good software which can do such task? Or the common process is to bake textures from photogrammetry model to scan in traditional modeling or texturing software? I'm not sure that photogrammetry geometry will accurate enough for baking... The other question is recommendations for the camera, and additional equipment. I can afford expensive devices if it will really worth it. Haha, after price we have paid for the scanners it would be strange to try to safe a bit of money on other equipment. Thank for the help in advance.
  16. I managed to find an old Mac running macOS 10.13 High Sierra and get a working RTI setup. It wasn't trouble-free to get it working, so I posted instructions on how to get everything working on an old system here: Hope this helps some people in the interim. Tom Curatorial Research Centre https://curatorialresearch.com
  17. I'm having to rebuild my RTI/PTM workflow on account of reinstalls etc. I know that none of the apps work on a macOS 64 bit system like 10.15 Mojave but I was lucky enough to find an old MacBook Air running macOS 10.13 High Sierra. Some of the links above are broken now, so here's a summary of what I did to get working RTI/PTM software in macOS 10.13 if you are lucky enough to have an old Mac hanging around. There are risks in allowing apps from being installed from anywhere, so bear this in mind if you are installing software from other places. Download RTIbuilder and add to the Applications folder as usual. It will not run, and macOS will report the app as broken. Disable Gatekeeper (this is what prevents the app from running) by opening a terminal and typing (or copy/paste) sudo spctl --master-disable Verify that this has worked by going into System Preferences > Security & Privacy and in the General tab check that there are now three options for installing software under "Allow downloaded apps from:" and that "Anywhere" is selected. Now you should be able to run RTIBuilder. If you're concerned about security, after you have finished building and viewing HSH RTIs, set the option in Security & Privacy back to another option such as "App Store and identified developers". If you want to create PTM files too: Right-click on RTIBuilder and select "Show Package Contents" then navigate into Contents > Resources > Java > Fitters > PTMfitter The folder will be empty. Keep it open and open a new Finder window/tab. Download the PTMfitter software from Carla's Dropbox link: https://www.dropbox.com/sh/jfsy0lhxu6zv4i4/AADJpq6E_GJmNw_s5C8r94CVa?dl=0 Extract the zip file and copy the file PTMfitter file (there's no file extension and this doesn't matter) into the PTMfitter directory that you still have open. Open a terminal and (assuming RTIBuilder is in your Applications folder) type/copy/paste cd /Applications/RTIbuilder-v2.0.2.app/Contents/Resources/Java/Fitters/PTMfitter Next, you need to make the PTMfitter file executable by typing chmod 755 PTMfitter Now you can close your Finder windows and launch RTIBuilder. It should now launch and be able to create both HSH/RTI and PTM files. I hope this helps some people at least. Thanks, Tom Curatorial Research Centre https://curatorialresearch.com (These instructions worked on macOS 10.13 High Sierra in February 2020)
  18. Hello, with Catalina macOS version 10.15.3 the RTIbuilder app works halfway with Highlight Bases (PTMfitter). I explain the process. - first step: detected spheres - run. - second step: set new center - run. - third step: Highlight detection - run. - in the final step, after locating the PTMfitter in the computer, the next error appears: "error=86, Bad CPU type in executable" This is an error as we already knew, the problem with convert here is that macOS Catalina dropped support for 32-bit executables. Attached is a picture of the error. The hshfitter does not work with the application either. This is the same error as with the PTMfitter. The difference is that in the last step, in this case (hshfitter) it processes all the images and then the error appears. "error=86, Bad CPU type in executable".
  19. Tom

    Buying a Dome

    I built a simple dome back in 2009 when I worked for Wessex Archaeology. You can see the build process here: If you have a few spare days, and are handy with a soldering iron, you could build your own relatively cheaply. I shared my methods and what I learned building it with the University of Southampton project which seemed to inform some of the features of the domes that are being made today.
  20. For me, RTIViewer works fine in macOS Catalina. I wonder why that should be (binary is dated 18 Nov 2013)? However, when launching RTIbuilder 2.0.2 macOS asks for 2017 Java, which won't run because macOS reports that it already has a newer version installed. Like Hembo, I can't create RTIs any more. If priority could be for HSHFitter, with PTMFitter coming later, that would be a great start for modernising these apps. There's nothing else like RTI! As Hembo suggests, time to dust off VirtualBox and try that route (or beg an old PC laptop from a friend!). I'm not sure how I can help as my programming skills are limited, but anything I can do to help I will. Thanks, Tom
  21. It could be possible that the .exe stored by the people at CHI has been infected over time. This could be investigated if someone has the original .exe, by making a MD5 checksum and see if the old and new file behave in the same way. I personally think that the antivirus software are detecting an old version of java virtual machine. rti-builder is old software that was never updated and still relies on an outdated version of the JVM, that has been exploited in all possible ways, and is consequently considered unsafe.
  22. This is an ongoing issue for the Windows version of rtibuilder_2_0_2_setup.exe file. I likewise get a notification from Windows Defender. It is infected with what MS calls "Win32/Dynamer!rfn". It also has a growing consensus among virus scanners, up to 10 now with Microsoft and Cylance being the most reputable, and filescan results can be seen here on Virustotal: https://www.virustotal.com/gui/file/a531b6de3861d3ac1f2ac2ca4d3ebefec1e65d3d50a44c957a8e345d79d26f5b/detection Virustotal also runs various website scanners which are also reporting malicious and malware at the link. https://www.virustotal.com/gui/url/26a92d3b13309e7e21169ecfca0a790752dafbc8c5b097c5b7fa989a86eb3256/detection Microsoft description can be seen here: https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?name=Trojan%3aWin32%2fDynamer!rfn&threatid=2147721515 Windows Defender and/or Essentials are not automatically configured on all machines. Some machines may have other anti-virus that do not detect it yet. At any rate some will see it and some will not. It's also possible that an already infected machine may not see it any longer, as the trojan may hide it or disable AV. At any rate the evidence that this current file is carrying a trojan is pretty good.
  23. 3dguy - thanks for your experiments and posting the above; still awaiting for response from Alessandro so don't know if he still has a problem; interesting re possible benefit of removing the metadata. cheers/Dave
  24. I ran into the same problem as Alessandro. HSH...no problem. PTM gave me an error at the final processing stage. Images were taken with a Nikon D800 at 7360 X 4912 pixels (36mp).Processing was done under Windows 10 with 64gb of memory. Per Dave’s recommended procedure above, I set up a fresh download of builder and the fitter on the C Drive. Pulled in the fish fossil sample set...that processed no problem. I then took my file set reduced the image size to match the fish fossil test set (2000 pixels on the long edge). Worked fine. So I started increasing the file size. To make a long story short, I ended up, removing the metadata, processing the full file size image, and then cropping the image at the end. I was able to successfully perform a PTM run with an image file cropped up to 29.19 megapixels. If I cropped to 29.21 megapixels or more it would fail, so it appears that there is a size limit on the PTM processor. Alessandro is working with a much smaller image size but only 8gb of memory , but I would think that that should be enough. I would recommend removing the metadata from the files, and then testing. Not sure what effect that will have but it seemed to make my files process more smoothly. Try different cropped sizes and see how far you can go before it fails. You can then size your images accordingly. I read a comment by Carla in another post that indicated that apple computers don't seem to have a problem. An associate of mine is going to try and see what happens. Hope this helps
  25. Windows Defender is the standard anti-virus program that comes with Windows 10. It will show up as a shield icon in the trayicon area. Double-click on it, select "Virus & threat protection => Virus & threat protection settings => Manage settings => Exclusions => Manage exclusions". Add the RTI_Builder folder (usually in the root directory on the C- drive). This should fix the problems. You may need to reinstall RTIBuilder.
  26. Hmm - I have it working on Windows 10 - just a regular install from our download in winter 2019. I haven't tried it recently. So sorry about all the problems. Carla
  27. I am experiencing the problem discussed in this thread. I read every post, but the www.rtigroup.org link posted by gwenrileyjones is broken. Is there a new up-to-date fix for this? I have Mojave.
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