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Dave Martin

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Dave Martin last won the day on August 28 2020

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About Dave Martin

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  1. Interesting open-access article on ways to extract features from photogrammetry models: https://www.cambridge.org/core/journals/antiquity/article/3d-contour-detection-a-nonphotorealistic-rendering-method-for-the-analysis-of-egyptian-reliefs/3DF1102C5016098C8D14D203D9D41C7C
  2. Dag-Øyvind, I can't help directly, but a couple of suggestions, as it looks like it might be a graphics driver related issue: 1) It might help if you gave some details of your laptop make/model, operating system, and what graphics card it has. 2) Is the problem / that screenshot from the laptop's internal screen, or when using an external monitor? 3) If you haven't done so already, might be worth trying with an external monitor 4) It sometimes can be illuminating to temporarily try putting your laptop (internal screen and/or external monitor) into a different lower resolution 5) It would be worth checking for updates for your graphics card - from the operating system, and from both the laptop manufacturer and the graphics card manufacturer. 6) You say this is all projects, do you have a project which you can view OK on one PC but when you copy the files (or access over network) they give this faulty display? MVH Dave
  3. MBennett, I don't know if there is any way you can synchronise or import chunks, but one possibility is if you have network connectivity, it might be possible to have various clients accessing one PostgreSQL database. Dave
  4. Ale, Particularly with PTM models, there are a range of visualisation aids, such as specularity, built in to the viewer already. Re "Metallic" - not sure what you're meaning exactly. RTI cannot perform any analysis of the subject's elemental composition by itself - you may get some clues from the photograph visual wavelength spectra, but you will get more - for bulk composition especially - using, say, XRF (X-Ray Fluorescence) - and hand-held XRF is becoming more common. Re "Roughness", there is work aplenty on machine vision assessment of 'roughness' as a production quality tool, using direct and scattered light and sometimes fractal analysis, but that is usually associated with prior reference data acquired with a similar part of known RA and RZ. I think it would be good if you could maybe explain your target / sample type / size / what you're trying to investigate. Dave
  5. Ale, I've posted an answer in the RTI dome acquisition section of the forum, suggest you might delete this duplicate question. Dave
  6. Ale, The idea of using addressable LEDs is definitely attractive; but I think it would harder than you think, and not very successful, to use those strips. 1) Those LEDs are not bright - you need a reasonably power light source to cast the shadows for the RTI process - or you need very long exposure times and noisy high ISO. 2) If you use such a strip, you will only be using a fraction of the LEDs 3) You can't just use, say, a sequential controller, you will need some form of programmable control - be it Arduino or PC or AVR or even TTL logic - to switch on the appropriate LED, let it settle, then fire the camera, and then repeat. Or, if your off-the-shelf controller allows you to specify switch on LED 74 at R=..G=..B=.. then you could do that manually, fire the camera, switch off LED 74 and then switch on, say, LED 81. 4) If you use such a strip, you will struggle to get the LEDs in the optimum position unless you cut the tape and solder fragments together (not actually difficult at all) and that is an attractive possibility (subject to note 1 above though) I have actually tried using strips similar to this as donors for a mini-dome, chopping into individual LEDS, placed appropriately around a dome and chaining them with soldered jumpers (light for data in/out, slightly heavier for power and ground, with extra power tapped-in periodically). However, results were not great due to low light output from individual LEDs. Dave
  7. Jackie, Regret I can't help directly (my last Apple PC was Apple-II on which I used UCSD Pascal for my PhD research!) but when you say you have removed the newest version of Java, I just wonder have you been able to remove all versions of Java. Certainly on Windows and some -ix operating systems, you can have multiple Java versions installed, so it is possible that although you removed one (the newest), there might be another slightly older, but still too new, version installed. One other thought if you can't resolve the MacOS installation is could you maybe run a virtual PC and clean-install windows thereon to give an environment to host required version of Java and then install RTI software in that virtual machine? Dave
  8. Luke, This rings a bell for some years ago - I have a faint recollection someone found a case-sensitivity. 1) Suggest you rename your files ".jpg" and try again. If that fails, 2) Have you ever been able to make a PTM before? if so can you try that image set again? 3) If this is the first time you're trying to make a PTM, suggest you download the Fish Fossil image set from the CHI website and try them, as they are known to work OK with both HSH and PTM fitters. Dave
  9. Hi Fionn, A couple of thoughts / questions. 1) Generally, it is a good idea to give a little info as to operating system and version and 32/64 bits etc. 2) Can you grab a screenshot of the box on the RTI builder screen where you specify the location of the PTMFitter, like the attached please? 3) On this laptop (Windows 7-32 bit) my location is "C:\RTIbuilder_v2_0_2\Fitters\PTMfitter\PTMfitter.exe". One thing that I wonder is your error message just ends "... /PTMFitter" but on my Windows machine the ".exe" is recorded and shown in the path. Dave (from Fionn mac Cumhaill's rock in the Irish Sea!)
  10. SpeiVerta, OK, I think may best not to try to climb Everest as first mountain! CHI have provided a sample set of images - which definitely work. If there is any problem, still doing this, there is no point going on to your relatively-massive pictures. Please forgive me if these duplicate what you know or have tried, but this is the simplest set of steps, could you try these as they definitely work. Please try these and let us know if you successfully make and view a basic HSH RTI as below. Dave On your PC, if you don’t already have one, make a folder RTI at the top level on your C: drive, and within that, make a folder Fish_1000 so you end up with C:\RTI\Fish_1000 Download the Fish_1000 set of example files from http://culturalheritageimaging.org/What_We_Offer/Downloads/Process/ And then – somewhere else on your PC - expand the fish_fossil-data-set_1000.zip file. In the zip file, down one level, you will see a folder jpeg-exports Copy that folder and its contents into C:\RTI\Fish_1000 so you end up with C:\RTI\Fish_1000\jpeg-exports which will contain 36 photographs named fish_fossil_01.jpg through fish_fossil_36.jpg Start RTI Builder In the Project Name box, type Fish_test In the Operation Sequence block, click on the first option – Highlight based (HSH Fitter) Then click the [Start new project] button On the Image selection screen which opens with an initial blank list, click the [Open folder] button at the right-hand edge of the screen In the Windows selection box which pops-up, it usually seems to default browsing to ‘My Documents’. Click on the ‘Computer’ icon (fourth one down) in the left-hand bar Double-click on C: Double-click on the RTI folder Double-click on the Fish_1000 folder Then click [Open] (N.B. please don’t click on the ‘jpeg-exports’ folder) You should then see a pop-up ‘Loading images’ with a progress bar When all the images have loaded, you should then see 36 images in the selection pane after which you should be able to proceed with RTI processing; and as you proceed with building your RTI model, you should see an xml and other folders appear in the project folder, so eventually, if you just proceed (using default options and not cropping) you will have: C:\RTI\Fish_1000\assembly-files C:\RTI\Fish_1000\finished-files C:\RTI\Fish_1000\jpeg-exports C:\RTI\Fish_1000\Fish_test.xml and your finished RTI will be C:\RTI\Fish_1000\finished-files\ Fish_test_1000.rti You will then have an HSH RTI which you should try to open with the viewer C:\RTI\Fish_1000\finished-files\ Fish_test_1000.rti
  11. SpeiVerta, Apologies that I can only reply in English. I can see there is definitely a problem, the size - as read by the HSHfitter - is enormous. The height and width used by the HSH fitter should, with no re-size, be the same as the 'Actual size' (see attached screenshot). It may well be that your images are too big for that HSH fitter, there are other options if that is the case but some questions/suggestions that may help identify the problem: 1) Did this work before for these exact images and just stop now? 2) Is this the first time you tried to build an HSH RTI? 3) Have you successfully made an HSH RTI for other images of your own? 4) IF you made one OK before, if you go back to that set, does it still work? 5) Have you tried making an HSH RTI with the sample set of fish-fossil images you can download from the CHI website? 6) If you can make the fish-fossil OK, it may be your images or the memory demand are too big. How many images are you using? / what is their size in MB? 7) If you only process, say, eight of your images, does the same happen? 8) If you - just for testing - make a copy of your images with smaller resolution, say 1/4 size, does that work? 9) Also, It is always useful to also report what operating system/version you are running?; also the source of your images? Dave
  12. David, Those modes are available if you generate via PTM rather than HSH. Dave (IOMNHAS)
  13. Mike, Just some more info to back your report up and maybe shed a little light for the developers: I've just tried this on my installation - with both CHI supplied test data and my own data. I had never tried for a PG set before, I get exactly the same as you. BUT if I highlight an RTI image set, it will allow me to export an RDF. Dave
  14. 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
  15. Hi Alessandro, Thanks for that information. By 'source' for the images I meant what camera and what type of file are you capturing (ARW, RAW, DNG, TIF etc.) and resolution; and any processing you're doing before attempting to make the RTI PTM. If you are able to share, if you could upload two folders (i) the files directly from the camera, and (ii) whatever you're trying process, to DropBox or similar, then I'd be glad to have a look and try to build PTM on my own workstations (will be a few days before I would have time though). Regards Dave
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