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mjm

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About mjm

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  1. Carla, Indeed, I don't really know too much about how RTI algoritms works. I got attracted to RTI since its based in multiple lights angles vision, thing that I always finded essential to the understanding of objects and their different deterioration factors. I am doing maybe the inverse way, starting from the pictures and facing the conceptual RTI exclusive elements later. Am sorry if I arrived to the point where I should read more instead of asking, is just that when I speaked of "the "default/cenital" image" in a negative I just made, it seemed to me that some information was lost and some where obviously "bad placed" as the effect where not the one we will see of a cenital view but from a mix between a cenital and a little rack one, and I think in this case am, again, facing a mistake I made. I will keep reading and examining the original shots so.
  2. I remade the pictures of the tintype in the video and the "problem" seems to dissapear in some level. I did that since it had become more easy than compare the 40+ original images individually. I made a rti of a negative surface with the hope of transmit the importance of the light angle when confirming the non existance of fungus, for example. But even if I think I used a bad example (while the fungus where a little too visible in more than one angle) the "default/cenital" image the rti file displays seems to be a little mix with at least one or two of the others. Is that possible in the case of the first image? And, of course, I consider to donate to CHI. I am not in the best economical shape right now but in the moment that changes (or if someday I use RTI in a paid work -by the moment is only for educational purposes-, whatever comes first) I will do it. I can keep posting videos of RTI files (will love to have a own website based in wordpress in order to be able to put RTI files directly for web viewing) of different photographic surfaces if you want to.
  3. Thanks for that really good answer, am sorry to take so much time to say it. I think the use of an snoot its a logical deduction, when we think small objects requires small balls, but in my case I tried with no chance. I use instad an small slave flash. In other examples I made, there's no over exposing in any of the photos, but I get that all white scenes when passing to the specular enhancement. I have checked the original jpegs in this tintype example with no evidence of blurring of movement from one image to other. I think I will repetar the pics in order to compare. Thanks for the advice about the sliders, I realise they help in some views, in fact.
  4. well, actually the video shows right, will love to hear opinions.
  5. That's great, and if I can help translating or correcting, spanish is my first language.
  6. For me, somebody with not really experience in coding, the red screen it seemed to be an issue related to the lack of memory, maybe similar in that way to the feature of the trackball and the continous changing... Thanks a lot for your answers.
  7. I have that problem in OSX Lion, but sometimes the image appears by "moving" the lightball a little bit, or at worst by closing and relaunching the viewer. It happends me around 50% of times I open an file. Nothing to worry a lot in my case, like the lack "continuity" when changing light angle (must actually click in other part of the ball in order to get the right light angle, by dragging the cursor is not enough). So if sometime you want me to test a new version, count me on.
  8. Thanks for these quick and cool answers. I let an small video from a rti file I just made some days ago in order to get some advice on it. There's some things I think are quick bad, and I will like to know also your opinion in including shots that are very reflective "burn outs"but that are inevitable because the reflective surfaces and that shows in some way some interesting information in other parts of the image, for example. Also, in this case I see a difference or blur between the images with lateral light from the left against the ones from the right, but am positive that the camera didn't move or so... Anyways, any feedback will be highly appreciated. (the reaction of the RTI Viewer is slow because my computer is slow). am sorry but I don't know how to insert youtube videos here yet...
  9. Hello, Since I work with photographics materials and the light control concept making RTI possible is essential when making ID and diagnostics in any kind of surfaces, I started making RTI from photo processes like ferrotypes, daguerreotypes (with and without cases) and another. I found that it can be also a great way for studing fungus progression in some surfaces. I will like to discuss with people having working with this kind of objects and RTI in order to learn from their experiences and knowing theirs points of view in several subjects. Anybody here? Kind regards, MJM
  10. Is the Screen Flow 4 making outputs in another format than video? I mean, I had a hard time looking for software to record the screen in order to share conferences and courses including the powerpoints until I knew the latests versions of Quicktime have that feature included by default... But of course speaking of RTI sharing, someting else than a video format can be highly appreciated.
  11. Speaking of ring flash, indeed, as any macro use it can have their issues. In this case anular reflections. But that only occurs with a macro use. Distances longuer than X doesn't give that effect. The Metz unit as even the possibilitty of redirect the lamps angle to "close"or "open"the ring depending on the distance to the object. In any case your observation is right and should it be mentionned and is something not so evident as red lights and led signals reflects for some flash and cameras will.
  12. I know its an old post but... The Metz 15 MS 1 ring flash is a small lovely external slave only flash unit that I use a lot. Is trigged by the built in flash (or another one of course). Its a ring flash but because its slave nature you can just use it where you want and not only attached to the lens filter ring. That's why I use it so often. In order to avoid intruder lights from the built in unit, this flash comes with a plastic clamp that you use to cover it but leaves some kind of light to go "outside", enough to trigger the Metz unit. Even if this clamp works in 80% of times, there's some chance of getting a red reflect in the image. I avoid it by putting some black paper in front of the clamp, wich almost never avoided the flash to get trigged. But wireless and sync cord based triggers are found at ebay by a couple of bucks. They worth a try.
  13. terrific, thanks a lot for your answer. Guess we will all wait for the real mc coy, that will really spicy the things up while speaking of using RTI at his best. I think also can be a great standart for plain visualisation of artifacts a lot more realistic than a simple jpg file. Projects like this make me regret not keeping my old programming skills updated
  14. I guess is a silly question and an already-a-lot talked about topic, but I didn't find info about it so... Is there a web viewer for RTI files? I think this tech is a lot more than a documentation-for-conservators tool so viewing RTI online is a must. Sorry if this is a dumb question. Kind regards
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