Search results

  1. S

    c++ multidimensional optimization library?

    You could try a Genetic algorithm - some of them have the ability to do multi dimenisional minimization - either that or a simplex algorithm (this might be better). But you still need to have an objective function that returns a single value typically....
  2. S

    c++ multidimensional optimization library?

    What type of problem are you trying to solve?
  3. S

    Editing photos- software advice?

    sRGB i think ....
  4. S

    Editing photos- software advice?

    I'm comparing RAW files in Picasa and Ifranview to the same RAW files in GIMP. They look the same in Picasa and Ifranview...
  5. S

    Editing photos- software advice?

    Hmmm - OK, I'm not certain it's a white balance problem per say - the whites look white. (I was photographing an aikido demonstration so there were white gi's involved...). However, the other colors in the photo appear to be off - flesh tones etc.
  6. S

    Editing photos- software advice?

    WOW - thanks for all the wonderful information. I guess my next question is - why do two programs see the raw images differently? (Well, 3 I've tried ifranview also - it's just slower... and it dosen't seem to be great for corrections...
  7. S

    Editing photos- software advice?

    I want to make some minor edits to photos (RAW files) - a little sharpening, color corrections and converting to black and white. Picasa seems to produce decent results, but it dosen't seem to produce high quality jpeg files. Anything I open in GIMP appears to be a little off in color - the reds...
  8. S

    Opteka 10xHD2 Macro lenses

    I've actually had some really good results with my current close-ups. I kind of like the distortion around the outer perimeter of the photo - adds a neat fish-eye effect almost. An extension tube is on my list but I shoot on a graduate student budget :(.
  9. S

    Opteka 10xHD2 Macro lenses

    Has anyone used the opteka 10xHD2 macro lenses? Opteka Lens Just wondering what you thought. Sassy
  10. S

    Stock Photography Websites

    Not really sure, wanted to do a bit more with my photography and stock seems to be the way to start....
  11. S

    Stock Photography Websites

    Has anyone ever submitted their work to a stock photography website? I was wondering if anyone could make some recommendations. Thanks, sassy
  12. S

    Lightning shots

    Nice reference - I think I am going to try this sometime this summer...
  13. S

    Ideas for a photo essay?

    Check out JPG mag - they have a ton of themes for their submissions. You might be able to get some ideas from there.
  14. S

    Best treatment for acne...

    Acne is normal at that age. Before going to a dermatologist, try a simple solution first - wash your face after each time you exercise, or are in an oily environment (I used to work in an Italian restaurant and my face would start to break out in the summer on longer shifts.) Also, make sure you...
  15. S

    Algorithm Help

    Hah - I decided to take the easy way out and forgo the sphere for a cube. Thanks though!
  16. S

    Book suggestions for self-teaching C++

    I second Brett's recommendation. I would also suggest C++ Programming in Easy Steps. It's a bit simplified but it is easy to follow and builds up the complexity nicely.
  17. S

    Algorithm Help

    Not sure if this can be done. I am writing a program to place objects evenly spaced on a spherical shell. Catch is, as the radius becomes bigger more objects are placed onto the shell. So in the first shell 6 particles are places at each of the 6 poles. In the second shell 14 particles are...
  18. S

    arrays of function calls and memory errors

    I am having a run time error that I can't relate to a mistake in the algorithm and seem to be reminiscent of a memory error. The object has an array of function calls which are initialized during runtime. The functions are then called with the following syntax: (this->*kCalls[tj][ti])(...
  19. S

    Stress fractures

    OK - so how do I determine how much weight I should be lifting - I don't mean to come across as argumentative, this is just not something I know a whole lot about. I know some guys who rotate and do arms/upper body one day and legs the next. Is there a benefit to do this for me - or should i do...
  20. S

    Stress fractures

    I've done pilates as part of a strength work out a few times a week -out of curiosity, is there a benefit to doing weight training that you wouldn't get from a pilates or yoga routine that use only body weight?
  21. S

    Stress fractures

    Can't indulge this one for a few days. Besides, do you really want to see martial arts feet?
  22. S

    Stress fractures

    Hmmmm..... as far as weight lifting goes, I'm not interested in bulking up - will low weight with high reps do the trick? Also, do you happen to know how much calcium you can safely take without running into problems like kidney stones?
  23. S

    Stress fractures

    I was at one point, before the first set, but not anymore - I tend to stick to aerobics or ellipticals now. I've been doing martial arts for the past few years and train on mats (barefoot). But sinceg I am having problems at the moment, and am confined to hiking boots, I plan to take up swimming...
  24. S

    Stress fractures

    So I have a stress fracture in my foot - and this is the second or third time that I have gotten one in the past three years (same foot, different bones). I'm in my mid twenties and I stay fit, so this shouldn't be a recurring problem. When I had problems with them the first time, the...
  25. S

    Hacking holga lenses

    Has anyone ever hacked a holga lens? http://www.jpgmag.com/stories/74 Just wondering if anyone has tried it - was thinking about undertaking it this winter.
  26. S

    DVD Player making funny sounds

    My DVD player is making some clicking sounds and not reading DVD's it's almost as if it can't lift the DVD to read them? Anyone run across this and know how to fix it? thanks.
  27. S

    Which of these two photos would you get printed and framed?

    I like pictures 207, 286, 296, 313, 375, 480, 491, 492, 505, 545 all more than the two you selected. They seem to capture more about the day. 207, 492, 545 and 505 are my favorites i think.
  28. S

    Which of these two photos would you get printed and framed?

    Out of curiosity, why in these two shots in particular? - There were other photos in that preferred to these two.
  29. S

    High precision doubles in C++

    OK the really funny part about this, not that you would personally know, is that the Fortran code won't currently compile - bleh. Anyway - appreciate the help but I got the problem fixed.
  30. S

    High precision doubles in C++

    This is quite a cool idea - and while i did get my problem working I am keeping this in mind for possible use in the future.
  31. S

    High precision doubles in C++

    Actually - what you said earlier about the numbers being very large - close to a billion or very small did help - i recast the problem a little bit to get the numbers ranging from -5 to 5 and that bought me the precision I needed. Now if I can get that fortran code to compile so I can compare it...
  32. S

    High precision doubles in C++

    I'm not exactly sure what this would accomplish - just compiling the source so it was compatible with C++?
  33. S

    High precision doubles in C++

    So I have this Fortan77 code that I inherited. Because dynamic memory allocation is a must (absent as far as I am aware in Fortan77 - the code itself has to be recompiled if the number of particles changes) and objects and the C++ vector class lend themselves really well to the particular...
  34. S

    High precision doubles in C++

    BTW - I do appreciate the help :)
  35. S

    High precision doubles in C++

    Nope - not a homework assignment, so you won't be giving me an answer ;) - it's for a simulation code I am working with. I am iterating the solution to a matrix equation and I want to ensure that the largest error between the solution at step n-1 and step n is on the order of 10^-18 before i...
  36. S

    High precision doubles in C++

    What is the best/most efficient way to handle high precision, where by high, I mean a precision greater than 10^-18, in C++? Help is much appreciated in advance :) -Sassy
  37. S

    C++ Pointers to Functions question

    So if you happen to call the functions in the same order each time a routine that assess the state is called - would that help keep the instructions stored in the Cache? Likewise, if the same one happened to be called over and over again?
  38. S

    C++ Pointers to Functions question

    OK - that is really cool to know. Now, this is probably the tougher question. How could I determine if using a set of if..else if.. etc statements, some with complex logic or an array of function pointers would be the fastest. On one hand - once the if statements are evaluated they would go to...
  39. S

    C++ Pointers to Functions question

    Oh the architecture I run on is almost strictly AMD 64bit processors if that makes a difference.
  40. S

    C++ Pointers to Functions question

    OK - I admit this is losing me a little. I've never had formal computer science training....I'm in chemical engineering and I do simulation work. So all I know about C++ I learned myself from writing simulation software. Anyway, I'm not sure how the L1 cache would affect my program...
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