Jump to content

Leaderboard


Popular Content

Showing content with the highest reputation since 10/30/2019 in all areas

  1. 1 point
    Hi Tom, Let me address a few things about the RTI software. First - both the RTIBuilder (with HSHFitter) and RTIViewer software are open source available upon request from us and under a GNU General Public License v3. This is noted in the software and the download page - and you only need to send email to info@c-h-i.org to receive it. We get 10-20 requests for the source code per year. Next - we are aware of the issues with the latest MacOS - Catalina and the requirement for 64bit software. We had some volunteer efforts underway to address this, which were set back with the insanity that 2020 has become. Just this week I received a test version of the HSHFitter that is 64 bit. If you want to test it, let me know. We'll release it once we've tried it out a bit. The PTMFitter is a bit trickier, because it's proprietary from HP, and none of the original folks who worked on it are there any more. We are working on a solution there, but it will take a bit longer. There is also a test version of 64bit RTIViewer for Mac - and it works fine for me (though I'm not running Catalina) and the person who tried it on Catalina couldn't get it to run. If you want to try that, again, let me know. Bottom line is that we do care about this software and know there are issues, but haven't had funding for software updates. We've put a small budget in a recent grant proposal that, if funded, should at least be able to get all the current software updated and running on the latest OS's and repackaged to get rid of the virus warning. We won't know until December if we will receive that funding. In the meantime, we hope to release these smaller pieces. There are a number of research labs working in this space. I don't know about the specific art scanner you link to, though Szymon Rusnkiewicz and team at Princeton have been doing similar things with modified flatbed scanners since 2007 - and have published some papers in this area such as this one: "A System for High-Volume Acquisition and Matching of Fresco Fragments: Reassembling Theran Wall Paintings" (with Benedict Brown, Corey Toler-Franklin, Diego Nehab, Michael Burns, David Dobkin, Andreas Vlachopoulos, Christos Doumas, and Tim Weyrich), ACM Transactions on Graphics (Proc. SIGGRAPH), 2008. We are interested in working to incorporate some of the most recent research in this area into usable tools for this community - and would like to do a proposal later this year to see if we can get it funded. We'll keep you posted if that happens. Thanks for your interest! Carla
  2. 1 point
    David, Those modes are available if you generate via PTM rather than HSH. Dave (IOMNHAS)
  3. 1 point
    and thanks for the mention Dave - I didn't see it until today sorry!
  4. 1 point
    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.
  5. 1 point
    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.
  6. 1 point
    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
  7. 1 point
    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)
  8. 1 point
    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
  9. 1 point
    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.
×
×
  • Create New...