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jlutgen

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Everything posted by jlutgen

  1. I am confused about versions of RTI Builder. I just downloaded and installed RTI Builder on a new desktop computer and was surprised that it was still version 2.0.2, which dates to something like 2012. I also noted that in the "About" tab it was labeled "Beta". This got even more interesting when I looked at an older laptop computer that I have not used for some time and realized that not only did I have version 2.0.2 installed on that machine but I also had a version 3.0, which was clearly different from version 2.0.2. I think I may have gotten version 3.0 as a Beta tester. So, was version 3.0 never released and is version 2.0.2 really still a Beta version?
  2. Thanks George for the reference. While some of it was beyond me, I think i got the general idea. Jerry Lutgen
  3. We currently use the standard Photoscan product. We are considering an upgrade to Agisoft Photoscan Pro, which CHI recommends. We are also taking a look at EOS Photomodeler Scanner. Has CHI or anyone else done a side-by-side comparison of these two products and made a case for choosing one over the other? We use 3D photogrammetry on a wide variety of objects ranging very small objects shot in the studio to large stone objects shot in the field. We almost always have a requirement for high resolution and highly accurate measurement. Down the line we may also get involved in 3D aerial photogrammetry. Jerry Lutgen HistoryTec
  4. I have never found any comprehensive Meshlab documentation. Does it exist? Am I missing something?
  5. The Museum of Science in Boston is opening a Dead Sea Scrolls exhibit in May. There are some non-scroll objects traveling with the exhibit that would benefit greatly from RTI. Is there anybody on the forum from MOS that would like to discuss the possibility of doing some RTI work on these objects? I may be in a position to get approval from the Israel Antiquities Authority to do this work. Please email me at jlutgen@jterp.com.
  6. Thanks George, that was very helpful. I'll check out your suggestions. It looks like we will have to assess how much of a commitment we want to make to getting this done right.
  7. Thanks Kathryn and Carla. Interesting stuff. For my part, I will just follow the discussion and wait for progress. Hopefully in the not-to-distant future there will be a method to intergrate RTI and 3d into a single work process and viewer. In the meantime we will simply perform RTI and 3D photogrammetry alongside each other.
  8. Thanks for the tip on lenses, I will check that out. I have not yet attempted a reflected UV RTI. All that I have done is some test photos on a "copy stand" using two MaxMax 17,000 microwatt UV flashlights, each with 16 LEDs. The flashlights were positioned about a foot from the subject. The camera was fitted with visible and IR blocking filters. So far I have done this testing on modern floor tiles, antique wood and several varieties of flowers(the "Black-eyed Susans" and Lillys did sort of OK). Depending on what I find out about the lenses, I way just get 2-3 more of these small MaxMax flashlights and assemble/wrap them together into a single higher powered unit. That is unless you have a better idea. Also, would my Canon speedlite put out enough UV to get the job done, if I also added visible and IR blocking filters at the source. Given that I already have visible and IR blocking filters on the camera lense, how important is it anyway that the UV source not also contain visible and IR components?
  9. Anna, We are also using DSLR Pro with a Canon T3i converted for UV/IR work. We are doing fine in visible and IR but not so great with reflected UV. One problem is that we are having trouble getting enough reflected UV for Liveview. We basically are getting a final focus by trial and error and then we shoot with long exposure, high ISO and wide open aperture. This is probably a long way of saying that our UV source is not strong enough. What are you using for a UV source and are you able to perform RTI with it? Jerry
  10. I now have a UV/IR converted camera and the IR photography is working great, but the UV is not working as well. Mostly I think that I am having trouble selecting the right UV source. My problem is I wind up using very long exposure times, large ISO and nearly wide open aperture. So, I guess my UV source just isn't strong enough. Do you have a recommendation for a UV source for doing UV reflected RTI?
  11. I am having the same problem. ACR works great with CR2 files on one of my cameras, but not the other. Since ACR won't read the CR2 file, what program do I use to convert a CR2 to a DNG? ** Never mind. I found the free ware program from Adobe that converts CR2 to DNG and it works just fine.
  12. When to you think the CARE tool will be available to the user community?
  13. Great, that was helpful.
  14. On page 25 of the "Guide to Highlight Image Capture" in the section on Quality Tradeoffs, a reference is made to converting the RTI data into 3D. I recall that during our training class Mark stated that converting RTI data to 3D was problematic. So, do you know of a workable method for converting RTI data into 3D?
  15. I am considering upgrading the machine upon which I run the RTI software. I was thinking about upgrading to a 64 bit machine, but I see that the "win32" is specified for the software. I assume that the RTI software will run just fine on a 64bit machine, but also that there is no particular advantage to running it on a 64bit machine. Is that correct? At some point will there be a 64 bit version? Jerry Lutgen
  16. We are planning to do a UV/IR conversion on a Canon Rebel camera. I looked at the company that does this work. It seemed that they were offering multiple options about how to do this. It might be nice to provide a simple guide about how one should do that conversion. Can you provide me with some guidance?
  17. For those of us who are not expert photographers it would have been nice to get some more guidance during the training class about when to switch between various lenses(e.g. between 50mm and 100mm lenses) and when to change aperture settings. Another way to say this is how do lenses and aperture settings change as you get close up or far away and as things get larger and smaller?
  18. We know that the capture process involves using Adobe Camera Raw to RGB balance at an intensity(?) of 200 for all three. However, we were not clear at what % grey were supposed to be balancing - 12%, 18%, Other?
  19. The starter kit we got from CHI did not include a color card. Suprisingly we were not able to buy the same (or even similar)color card at our local camera stores. What is the brand of the color card you use and where did you get it? Perhaps you could add a color card like the one you use in training to the starter kit.
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