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Dave Martin

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Everything posted by Dave Martin

  1. Dave Martin

    Not able to import images.

    Hi Dragos, I've just had a look at the manuscript page image. It's big, but possibly processable. I'm a little confused though: 1) that image doesn't have any reflective sphere(s) that I can see in the shot? which are necessary unless you have a pre-calibrated lighting dome or rig. 2) that image looks to have fairly flat / uniform illumination? rather than from a point source. 3) are you trying to make an RTI out of just one image? - if so, that won't work - you need a number of shots with the camera position/orientation held steady and the point light source illuminating the object from different directions (see the RTI capture guide on CHI's web site at http://culturalheritageimaging.org/What_We_Offer/Downloads/Capture/index.html and the RTI processing guide at http://culturalheritageimaging.org/What_We_Offer/Downloads/Process/index.html ) Can I suggest you get to grips with making an RTI model with the set of images linked to above with CHI provide, which we know work. Dave
  2. Dave Martin

    Not able to import images.

    Dragos, The screenshot shows "Unknown Error Detected", that is known and various threads on this forum relate to it. It is, I understand, reported as the cryptic "Unknown Error" because RTI Builder hands off to actual Fitter to do the numerical processing, and if the Fitter doesn't work, it doesn't necessarily report why. Have a search here for "unknown error". You have installed the fitter, haven't you? You also mentioned processing "1 file" - that DropBox link doesn't work - do you mean just one picture? (There may also be Mac issues but I'm sorry that I'm not a Mac expert - my last Apple machine was the twin-floppy Apple II on which I wrote some of the software in UCSD Pascal for my PhD - just Windows and Unix for the last forty-odd years) Dave (just another RTI user!)
  3. Dave Martin

    Not able to import images.

    Dragos, A few things that would help narrow this down: Have you managed to build and view RTI files before? Is it just one set of images that causes this? If you have a set of images that worked previously, can you try re-processing them? Can you advise hardware and operating system? Can you confirm if you have admin rights and full access to the file system on the computer? Can you post a screenshot showing the file structure where the images are that you are hoping to process? Can you share one of the image files you are hoping to see (and process)? Do you have any other computers you could try on? (even with just a small set of a few images) What happens if you try processing the sample image set that CHI provide which is known to work? (download in various resolutions from: http://culturalheritageimaging.org/What_We_Offer/Downloads/Process/) Dave
  4. Dave Martin

    Archival Record Preservation

    Henry, I'm sure you're not alone in this! You might find it useful to reach out to bodies such as the (UK based) Museums Association https://www.museumsassociation.org/ If they cannot help directly, they might be able to advise other useful professional curatorial contacts. Dave
  5. Ken, just another thought - you're not moving or re-naming any of the files are you?
  6. Ken, Re trying a known good PTI file; I'm away from my workstation with files currently but if you haven't got this cracked by this evening I'll pop a working RTI in a dropbox folder for you tonight. Dave
  7. Ken, Re the PTM fitter, there's a replacement download link here:
  8. Ken, A few things that would help narrow this down: Have you managed to build and view RTI files before (on any of these machines)? Have you any older RTI files you can (still) open? Is it just one set of images that causes this? If you have a set of images that worked previously, can you try re-processing them and then see if you can open the RTI file? You mention it is the same on multiple computers, does that mean you've done the whole process (generate then view) on each PC? If you generate on one PC is it unreadable on all three PCs? Is it the same if you generate using the PTM fitter? Dave
  9. Dave Martin

    Unknown Error Detected

    Niki/Judith, I'm just a fellow-user, not involved with RTI software development, but I also use Windows platform. If it would help you, if you can share some images I would be glad to try them if I get a chance at the weekend. Will send you message with my contact details if you would like me to try. Dave
  10. Dave Martin

    Unknown Error Detected

    Niki/Judith, a couple of thoughts: 1) to try and find out if it is something with the images, or with, say, memory, it would be worth as Carla says trying a down-sampled set of the same images just as a test; maybe resample them down to half their size (you can use the free IrfanView to do this in batch mode). 2) also, if you have a smaller number of the big images, does it crash the same? 3) does it always stop on 000361.jpg ? 4) the folder named says ....\cropped\... - are all the images the same size after cropping? - is there any chance the offending one is a different size? 5) is it the same if you try on a different computer? Dave
  11. Dave Martin

    Processing in Multiple Locations

    Whilst I have never done trans-oceanic capture/processing, my advice would be to try and do it on site - not necessarily at the monument but whilst you are still in-country. Points which I would suggest you consider include: 1) the processing overheads are not enormous - certainly unlike the demands placed by processing SfM photogrammetry - and it is well within the capability of a reasonable modern laptop. 2) uploading to a 'cloud' location could be slow and un-reliable. 3) if you process say, same day, you can tell if all is OK; so if you discover a problem you can re-shoot and/or amend your procedures for other forthcoming sites in the same campaign. Even if you are shooting tethered where you can see results on a larger screen as you shoot, it still makes real sense to process at the earliest opportunity. As an example, if the sphere(s) get nudged part-way through a shoot, unless it is a gross movement, each frame will probably still look OK as a standalone frame, but it is only when you do the processing you may find alignment problems (I've done that and had to return to re-shoot, thankfully only 15 miles away). Processing on a good laptop might take a couple of minutes more but not hours more. Edit: another reason, similar to (3) above, is that sometimes when you process, although you didn't make a mistake shooting, when you process it, may reveal 'something', say at the edge of the field of view or just disappearing round the side of something, so you may want to pop back and re-shoot from a different camera position to try and capture more... Dave
  12. Dave Martin

    RTI Builder Versions

    Jlutgen, Re version numbers - the one I'm using is 2.0.2 Where you are seeing '3.0' are you sure that's not the software license you're seeing? as that is 'GPL 3.0' ? Dave
  13. Dave Martin

    CHI's Resources for Photogrammetry Users

    Shahin, I think the answer is "it depends"! - it depends on what you're trying to image - a small artefact or a building; it depends on what version of PhotoScan you're using (and just to confuse things, they have renamed it from PhotoScan to Metashape with the release of version 1.5); it depends on the sensor used; etc. Far and away the best place to search for help on PhotoScan is on the dedicated Agisoft forum - just search for "workflow" (almost 80 hits). One thread to which I would particularly refer you to is https://www.agisoft.com/forum/index.php?topic=9485.msg43931#msg43931 which discusses the workflow developed by Tom Noble et al of the USGS, and that of Bob Meij. (would also suggest this might be better in a thread of its own ....) Dave
  14. Dave Martin

    RTI Builder Unknown error

    Niki, If it is a resource issue due to the size of the images, one way to identify if it is absolute image size that is causing a problem, or just the total demand on the system, might be to try processing a reduced number of your hi-res images. I don't know how many you have in your full set - I have 50-100 typically - but if you maybe tried with maybe just ten images? - the RTI obviously wouldn't be as good but it might help to diagnose the problem? I'm sorry that, as just another user, I can only use my RTI and computer troubleshooting experience, I haven't any access to the innards of the programs! Dave
  15. Dave Martin

    RTI Builder Unknown error

    Nikki, another tiny thought in case it helps shed light on the problem. You might just see something if you have memory monitoring displayed when it crashes on your big images? and there might also be something written into the Windows logs? Dave
  16. Dave Martin

    RTI Builder Unknown error

    Thanks Nikki, sounds as if moving (slowly!) towards possible indicators. I'm glad it works for at least sample images so software setup looks OK. I don't know about any absolute image size limits, I just did a quick search here and found this thread which does describe processing large images 10328x7760px, albeit I think on a Mac. I'm sorry that I can't help much more at present - I'm not in front of my (PC based) RTI workstation, I think it may be a case of waiting until Carla and team at CHI are on-air (San Francisco time). mfG Dave
  17. Dave Martin

    RTI Builder Unknown error

    Also Nikki, another thought - if you download one of the sample image sets from the CHI website, which are known to work OK, do they work on this PC? Dave
  18. Dave Martin

    RTI Builder Unknown error

    Nikki, Firstly, now that error message is visible, there is a thread here on this forum about exactly that message which might give you some clues Secondly, have you tried on another PC? Dave
  19. Dave Martin

    RTI Builder Unknown error

    Nikki, path looks OK as far as I can tell. Couple of questions: 1) you mention it fails after cropping, does it fail if you don't crop? 2) you mention you're trying PTM, you have downloaded and installed the PTM Fitter, haven't you? (page 10 of the processing manual) 3) if you try HSH rather than PTM, any change? Dave
  20. Dave Martin

    RTI Builder Unknown error

    Niki - can you post a screenshot showing the file path?
  21. Dave Martin

    3D File Formats to Archive and Display

    Jack, I think this is an important question to consider, and the answer may depend on the purpose and the longevity expected. You mention Archive and Display, and I think there are useful parallels in terms of images, especially as we may have one format for long-term assured storage and another for speedier manipulation and display. You mention DNG, and DNG can contain TIFFs. Top-level archives which accept images will often specify they must be un-compressed TIFFs. This seems counter-intuitive in that they are taking on storage obligations which could be significantly reduced, but they are protecting against future licensing changes. The TIFF standard has no proprietary issues, but some of the algorithms behind compression standards, whilst open to read and implement at present, are private property, and there is the danger that permission may be revoked. Whilst not implying any concerns over or criticism of Khronos, it states at the top of https://www.khronos.org/gltf/ “glTF™ (GL Transmission Format) is a royalty-free specification” – in other words, it looks to be remaining Khronos’s property. There are precedents to be a little concerned, especially for the long-term. The Graphics Interchange Format (‘GIF’) is now thought of by most as a container for handy little images or animations etc. The GIF was developed by the Compuserve BBS team, and internally the data is losslessly compressed using LZW. LZW is proprietary, and from what I recall, there were attempts by those who owned them to assert their rights the LZW algorithm, and this led to the development of the open PNG standard. I don’t have an answer in the ‘model archiving’ space but will be interested to learn. Dave
  22. Dave Martin

    re-assembling fragments

    Hi P fried, I don't know if there is anything off-the-shelf yet, but a couple of articles on computer-vision jigsaw solving: https://www.i-programmer.info/news/181-algorithms/4380-faster-jigsaw-solving.html https://www.researchgate.net/publication/220843444_An_Innovative_Algorithm_for_Solving_Jigsaw_Puzzles_Using_Geometrical_and_Color_Features Another related area which is receiving attention is the DARPA Shredder Challenge - reconstructing documents from images of shredded strips or fragments. Let us know how you get on! cheers/Dave
  23. Dave Martin

    re-assembling fragments

    P Fried, I don't know how well it would translate to such a context, but there has been work in the computer vision field trying, and succeeding, in solving jigsaws, so there might be something there. Suspect they're geared around 2D, but might be possible to use them to produced an 'unwrapped' solution? Dave
  24. Dave Martin

    Error Dump

    Katie - have you downloaded the PTM from the Hewlett Packard research site?
  25. Dave Martin

    Masking trouble in Agisoft Photoscan

    Crystal, I'm not in front of my PhotoScan workstation, but a couple of quick thoughts: There are several options for masks, one of which is a separate mask for each image, in which case all you do is select the folder containing the masks - and the symptoms sound like possibly that's the route you're currently going down. I'm not sure if you have visited it already, but - especially as the issue isn't particularly subject-matter specific - I'm sure you would find it worthwhile to visit the dedicated PhotoScan forum operated by Agisoft themselves, where there's support from Agisoft staff and fellow users http://www.agisoft.com/forum/index.php?board=7.0 Also, on the Agisoft forum there is info on new masking methods (single image, volumetric...) which have been introduced in recent versions of PhotoScan. Dave
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