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  3. cdschroer

    Masking trouble in Agisoft Photoscan

    Thanks Dave - yes - we try to keep to more general photogrammetry issues here in this space because Agisoft runs forums for PhotoScan. We are happy to entertain general questions about setup, good practice, equipment, photogrammetric approaches, etc. That said - there are some odd behaviors within photoscan related to masks whether you are doing an individual image, or a whole set. Crystal is correct that you need to select the folder containing the images, and the background image. If that folder is already selected then I usually select another folder, then the one I want to use before saying OK. Go to the Agisoft forums if you continue to have difficulties - and make sure you include what version of photoscan you are using, and what platform you are on (Mac, windows, linux - and OS level) Carla
  4. cdschroer

    Why my rti file is invaild and internal format unknown

    Hernandez - I'm not clear what problem you are having. First you need to have a .ptm or a .rti file. If instead you have a file of some other type (like Fmck showed) then this isn't a valid rti file. My guess is this is the result of something like the WedRTIViewer which does pre-processing on an rti or ptm file to set it up to work with a web based viewer. If that is the case - then the resulting folder has to be set up on a webserver with the appropraite HTML code to call it. This is described on the web page for the WebRTIViewer. I'm not an expert on that. If you want to use the regular RTiViewer - then you need an rti or ptm file. Carla
  5. cdschroer

    Missing file: PTMFitter.exe

    Loa - We wish we could include the PTMfitter software, but this license issue (from HP) prevents it. The easiest way to check for spaces in your pathname is to go to the "assembly-files" folder created by RTIBuilder and open one of the .lp files (it is just a text file - you can open it in any text editor) There you will see the full path to the image files. You will be able to see if you have any spaces. If you do - move the whole folder (with the .xml log file, and the jpeg-exports folder, etc) to a correct location - or rename the needed directories. Then you should be able to build an RTI from the existing project without having to detect the spheres and highlights again. How to do that is described towards the end of the user guide - and also elsewhere in the forums. If the filenames themselves have spaces, then you will have to start over after renaming them. Good luck!
  6. Khalid - I can get both files from these links. The RTI spec was uploaded to this forum - so you have to be logged in to the forum to get it. I should have specified that in my earlier post. What happens if you click on the link? (For me, it downloads the file to my downloads folder) Carla
  7. Earlier
  8. hecoules

    Color mapping to normals direction

    I'm arriving a bit late to the party here, but I think that this has something to do with the problems described by Lindsay MacDonald in p106 of his PhD thesis. He claims (and I'd agree) that there's an error in the original 2001 paper by Malzbender et al. - specifically that the surface normal is stated incorrectly in eq. 18. It looks as though this error has persisted into PTM fitter, and so what is reported by RTIBuilder to be the surface normal vector is actually the specular vector. This means that if you take the 'surface normals' image from RTIBuilder and apply the linear mapping described by several contributors above (i.e. [0 to 255] for [-1 to 1] for each of the three vector components), the result is out by a factor of roughly 2 (assuming that the camera is remote from the subject). Can anyone else confirm this? Maybe someone involved with fitter development can lend some insight. Looking at the results from the HSH fitter there seems to be a similar thing going on, although in that case there is no mathematical reason (that I can think of) why there should be an issue...
  9. Dear Carla, Greetings from Pakistan! The RTI file format PDF is no longr available at the above address. Please share a fresh link once again. Best regards. Khalid Hussain Pakistan.
  10. 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
  11. Hi there, It has been a while since I've done photogrammetry on a turntable object, and I'm having trouble importing the background masks. Once I had my photos organized into their appropriate chunks, I tested my the tolerance for my mask on one photo. Once I figured out the appropriate tolerance for my situation I tried to apply the mask to the whole set of photos in that circuit. I selected all the photos in that circuit and then Right clicked --> Import Masks I copied the file name of the background image from that circuit and pasted it into the Filename Template field "selected cameras" was chosen in the "Apply to" field. This is where the trouble starts. When I hit "OK" and try to select the folder of the images from that circuit, I am not given the option to "Choose" that folder. My only option is to "open" it and then all of the containing images are greyed out so that they can't be selected. What am I doing wrong here? I'll be grateful for anyone that can help shed some light on this for me. -Crystal Heis
  12. VO1D

    How does RTI Viewer calculate Normal

    Thanks a lot, it solves my problem.
  13. gianpaolo

    How does RTI Viewer calculate Normal

    It is simply the stationary point of the paraboloid described by the 6 coefficients. The formula is described in the original PTM paper: http://www.hpl.hp.com/research/ptm/papers/ptm.pdf
  14. In the source code of RTI viewer, I found the following formula to calculate the normal of each pixel from the 6 coefficients: Where does it derive from? Does any paper or book mention this topic?
  15. ozbigben

    photogrammetry of objects behind glass

    It depends a bit on the distance between the glass and the object. I've used a step-up ring with some felt attached to prevent damage to the glass, and then photograph the object with the lens pressed against the glass. This avoids the reflections from the glass. Reflections from the back of the case can be removed by masking the images. If you need more distance from the glass you can make up a black velvet "cone" to block out reflections from the front of the case... but not always practical either.
  16. I was wondering if anyone had any success doing photogrammetry on an object that is behind glass. I'm planning on doing some tests with polarizing filters to try to remove the reflections, but I was curious if anyone else had tried this before. -Crystal Heis
  17. The path to .ptm file should not contain any non-english characters, or the file format is invalid. Check this
  18. Hi Carla, thanks for the insights. I'm having pretty much the same issue as Fmck. I'm not sure what to do about it though. Could you help with a step by step guide on how fix this by any chance? Cheers!
  19. Loa

    Missing file: PTMFitter.exe

    Dear Carla, Thank you for your speedy reply. I did read about filenames and pathnames, but can't find the spaces. I will look again tomorrow - I did read somewhere that it was a windows problem. I didn't save the images on the desktop for the same reason. I apologize for the repetitive questions, but I totally overlooked the HP stuff on the webpage - though I/IT dep. have tried to install so many times for the past month. And It is not obvious to me in the guidelines, that I feel I have read and reread many times. I truly appreciate your good work. Thank you! Loa
  20. cdschroer

    Missing file: PTMFitter.exe

    Dear Loa - Sorry you have had such difficulty getting the software installed. It is very well documented in the User Guide that the PTMFitter is not included with the software and must be downloaded and installed from HP's website. This is because the RTIBuilder and HSHFitter software are both available under an open source license (GNU GPLv3) and the ptmfitter has a free for non-commerical use license with no source code. That license from HP does not allow us to bundle the software together, though it does allow you to download it for free and tell RTIBuilder where you installed it. You should be able to run the hshfitter without installing the ptmfitter. The "unknown error" message is likely not an installation problem. It is described in multiple places on these forums. The highest likelihood is that you have spaces somewhere in your image filenames and/or pathnames (i.e. the directories the files are stored in - all of them up to the root directory on whatever drive they are stored in) This is also a well documented issue in the user guide as well as the forums. The User guide should be where you turn to first to understand how to work with the software. It is free software and we have worked hard to provide good documentation, as well as these forums. The software is quite old at this point, and we would like to find funding to do an update. In the meantime - the software does work, albeit with a few quirks. Carla
  21. Hi, I really had trouble getting my IT department to install the RTI builder application. Now it is installed - after a month of quarrels. And now I get all the way to fitting the PTM so I tried the only fitter.exe file I could find - the hshfitter. And I got the message Unknown Error Detected! I'm assuming the PTM fitter file should be in the Fitters folder but I as I said - I can only find the HSHfitter. I looked around in the other folders and found something in the Plugins folder - and found a folder called PTMfitter - but looking into that I find a .txt file and a PTMfitterPlugin.jar file. Can anyone help me? Did the IT department mess up the program?
  22. cdschroer

    Import to RTIbuiilder

    You need to give RTIBuilder the folder that contains the jpeg-exports folder - not the jpeg-exports folder itself. In other words, choose the folder one level up from the jpeg-exports folder. This is documented in the user guide, which can be found here: http://culturalheritageimaging.org/What_We_Offer/Downloads/Process/index.html Carla
  23. Inês Oliveira

    Import to RTIbuiilder

    Hello, I'm having trouble importing the images to RTI builder. I can open the folder where they are, but then I can´t import them (image attached). I thought it could be something wrong with my images or folder so, i've tried with the fossil images you have as an example. Didn't work.
  24. Thank you for the information!
  25. Dale

    Photogrammetry with 3d camera?

    You can do 3D scans with the xbox dual camera kinect, and the results aren't any better than with a regular camera from what I have heard.
  26. cdschroer

    Why my rti file is invaild and internal format unknown

    IT looks like only one of these is a ptm file - the first one. The other are all a different (.dat) format. The PTM file at 1KB is not a valid file. The file sizes would always be larger than that. I'm not sure how these were shared with you. Is it possible that these files are the result of some pre-processsing step for Web distribution? There are a couple of web viewers out there that require that you take a PTM or RTI file and run it through a program to prepare it for Web distribution. If that's the case, then you can only open the result with the web viewer, after the files are properly staged on a web server. What you want is just the regular full size RTI (or ptm) file. Carla
  27. Hello! I've encountered the same issue opening files that have recently come to me, created in 2012. See attached image for file size and whether it is a 'proper' image. Your help would be very much appreciated!
  28. Thanks for the additional details. I'll note that you can associate a photo with a group of RTI image sets - which doesn't totally get what you are asking for, but is simpler than associating with each image set. Also, the ability to "duplicate" image sets and/or groups of image sets will also automatically associate the photo. I agree that these ideas are "workarounds" for what you are asking for, but thought I would throw them out there in the hope that you might find the suggestions useful. Carla
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