Site Sponsors
Results 1 to 47 of 47

Thread: Stitching multiple 40MP files - computer 'grunt' required

  1. #1
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Stitching multiple 40MP files - computer 'grunt' required

    Hello all,

    I am about to embark on a pretty ambitious task - creating a large panoramic file using about 24 files from my 40 megapixel 645D. I have a Mac Pro with 16gb of RAM and am about to install Photoshop CS5 so that I can use 64-bit processing's ability to allocate most of the RAM to Photoshop for the task. I can't test thins yet - because I don't yet have the software. But I know my current set up with CS3 (with its associated RAM limitations) won't even come close to performing the task. Just for giggles, I tried a few things in CS3 to do a quick preview of how the full file will look. I created smaller JPG versions of the files; I stitched pairs of files together, then joined those files together; etc.. All of this had problems - the smaller JPGs would not stitch together unless they were very small indeed! Stitching in pairs created very odd perspective artefacts that were hard to fix later (I am assuming that stitching all of the files at once will not have this problem, but maybe I am wrong about that...).

    Anyway, I have decided to try and use CS5 (with 15gb of RAM) to stitch all of the files together at once, hopefully as 16-bit TIFFs. This is asking a lot, of course. So my question is - how much RAM do you think I will need to do such a thing (joining 24 40MP 16-bit TIFF files together as one operation)? Will 15 be enough or am I, as I suspect, not even close? I could get even more RAM of course, but not sure if such a thing is needed. And will joining all files together at once create a different (and better) perspective result than joining files together in pairs and doing it progressively?

    Many thanks!

    Ed

  2. #2
    Senior Member
    Join Date
    Jun 2008
    Location
    SoCal
    Posts
    291
    Post Thanks / Like
    Images
    15

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Is there not a 30 day free "try it" feature with CS5? Just download and try it out, if it fails try 8 bit tiff.

    Cheers, -Peter

  3. #3
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Thanks Peter. Not sure if that is available as an option, but will look into it. However, it anyone has any experience of how much RAM I will require, such advice would also be most welcome.

    Best wishes,
    Ed

  4. #4
    Member
    Join Date
    Dec 2010
    Location
    Port Orchard, WA
    Posts
    157
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    This might or might not help. I use a 1st gen MacPro w/ 8GB and have stitched 10 33MP 16 bit TIFFs in CS5. It was not exactly pleasant, but it did it. Once assembled it handled the file just fine.

  5. #5
    Senior Member
    Join Date
    Jun 2008
    Location
    SoCal
    Posts
    291
    Post Thanks / Like
    Images
    15

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Another thought, maybe try AutoPanoPro (I know they have a 30 day trial). It works very well, however I have never tried a job as large as the one you suggest. In any case, it may just take longer - even over-night, but it should complete it even though it may be RAM starved.

    Cheers, -Peter

  6. #6
    Senior Member
    Join Date
    Oct 2008
    Location
    Munich
    Posts
    876
    Post Thanks / Like
    Images
    1

    Re: Stitching multiple 40MP files - computer 'grunt' required

    It dös Not matter how much ram you have. It will just take longer. The more ram you have the quicker the process. I currently have 48gb and even 20 images shot with the P65 stitch easily in PtGui or AutoPano. However, opening them in CS4/5 is another story. It is sad, that as far as I know Adobe still can't use a lot of CPUs cores for this purpose.

  7. #7
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Thanks for that guys.

    Christopher - it appears that this is one operation for which the amount of RAM does matter (at least when it's done in Photoshop). With my current set-up, which is rather RAM limited, I get an error message saying that the operation cannot be performed due to a lack of RAM. So it's not just a speed issue. Even the fact I have a large scratch disc does not prevent this from happening.

    My suspicion is that this is the case because comparing files and putting them together is something that requires a certain amount of data to actually be held in RAM at once (passing data back and forth to a scratch disc or just doing it slowly using a small amount of RAM seems not to be a substitute) - if it can't 'hold the information in its head' the operation cannot be performed at all. Now, I am no expert in this area, but that's my read on things.

    If it it just a case of being patient with a slow operation, I would put up with that for such a relatively rare task. But sadly sufficient RAM seems to be required for it to be done at all.

  8. #8
    Senior Member Graham Mitchell's Avatar
    Join Date
    Nov 2007
    Location
    London/Kiev
    Posts
    1,079
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    If you have installed maximum RAM and allocated it to CS5 in 64-bit mode then there's not much else you can do except use a fast SSD as a scratch disk.

  9. #9
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Hi Graham,

    I have not yet done that because I have not yet installed CS5 (am away from home for a few days and will do so soon). I also have not installed maximum RAM because I have not yet purchased more. In fact one of the goals of my question was to establish how much RAM I might need to purchase for such a task. At present, your statement 'maximum RAM' refers (I think) to 96gb if I chose to spend a lot to purchase such a thing, but I would rather spend less! So some indication of what is required to enable my computer to perform the task in the first place is really what I am after.

    Also, re. scratch disks, as indicated above, this seems to be an operation that does not make use of them (I already have a huge scratch disk, but the computer stops the operation due to lack of RAM).

  10. #10
    Senior Member Graham Mitchell's Avatar
    Join Date
    Nov 2007
    Location
    London/Kiev
    Posts
    1,079
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Hi Ed, I don't know for sure but I imagine that your 'tiles' are about 225MB each, which for 40 tiles should be in the vicinity of 9GB, and the resulting layered file should be similar in size (you could check these file sizes yourself with a smaller test). So I would estimate that 18GB would be enough RAM to avoid scratch disk usage. The rest should be down to processor and disk performance. This is all just my 'hunch' and shouldn't be taken too seriously

  11. #11
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Thanks Graham - I can see the logic! I'll try it once I have installed CS5 with my existing 16gb of RAM (allocating 15) and see what happens. If that's not enough, I'll upgrade... Either way, I shall share the outcomes here :-)

  12. #12
    Senior Member
    Join Date
    Dec 2010
    Location
    Warks, UK
    Posts
    550
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Ed HUrst View Post
    Thanks for that guys.

    Christopher - it appears that this is one operation for which the amount of RAM does matter (at least when it's done in Photoshop). With my current set-up, which is rather RAM limited, I get an error message saying that the operation cannot be performed due to a lack of RAM. So it's not just a speed issue. Even the fact I have a large scratch disc does not prevent this from happening.
    It does seem incredible that Photoshop cannot use a scratch disc when it runs out of RAM .... what do we pay all that money for? Is 5.5 any different?

    I just got a 4TB 3 Gigabit e-SATA external disc for my Mac Book Pro ¿but would it help?

    I am expecting to get a £10K Mac Pro sometime, when I need it.

  13. #13
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Hi Dick,

    Apologies if I have confused matters! PS does indeed use a scratch disc (and there are lots of settings etc. you can choose related to how this works). Thing is, from experience seems to suggest that doesn't help with the specific operation of stitching. I would be delighted to be shown to be wrong about this btw!

  14. #14
    Senior Member
    Join Date
    Feb 2011
    Location
    W. NY, close to Toronto, far from NYC
    Posts
    1,427
    Post Thanks / Like
    Images
    9

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Ed:

    I don't think it will be a problem, just slow. Here's a 7 exposure stitch of 645D files done on my laptop with only 6GB RAM and no separate scratch disk. (CS4, Win 7, 64 bit)

    Tom

  15. #15
    Senior Member
    Join Date
    Dec 2010
    Location
    Warks, UK
    Posts
    550
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Ed HUrst View Post
    Hi Dick,

    Apologies if I have confused matters! PS does indeed use a scratch disc (and there are lots of settings etc. you can choose related to how this works). Thing is, from experience seems to suggest that doesn't help with the specific operation of stitching. I would be delighted to be shown to be wrong about this btw!
    Stitching is one of the thing I want to be able to do - another is dof/focus stacking ,,, are the problems similar?

  16. #16
    Senior Member
    Join Date
    Jan 2009
    Location
    Arlington VA
    Posts
    746
    Post Thanks / Like
    Images
    11

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Hey Ed, I have been doing a few of these panos with my 645D. A couple of suggestions. Reduce your files to 8 bit, you won't see the difference. If you are going to do any processing in ACR, be sure to save notes on the settings so all of the images have the same factors. Then create parts of the pano is sections. I have 10 gigs of RAM on my MacPro and I process 6 or 8 captures at a time so I don't have to go plow, plant, grow, and harvest zucchini before the file is processed. Just name them pano 1,2,3, etc. Then after you have the set, merge those. After you stitch the parts together, do your final post processing.
    On-line portfolio
    www.abouddweck.com

  17. #17
    gimlor
    Guest

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I believe you need to enable the 3D hardware (GPU) support (within CS5) which might speed things up. If you have a good card and its supported for that feature it'll help . Then you can go finetune the GPU support options which become availalbe.

  18. #18
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Hey guys - thanks for all the suggestions and ideas.

    I shall certainly use 8 bit files if I need to (with my current CS3 set up and its lack of access to RAM, that made no difference with 23 files, but maybe it could allow me to do it with CS5 and about 15gb of RAM, if it won't do it with 16 bit files). As for doing the stitching in sections, see my notes on this above - I have found that doing this messes up the perspective in a complicated way that is hard to fix later; it creates 'bowing' around the centre of each of the frames I create as an intermediate step which then means that the overall file at the end has a strange set of multiple distortions (if you know what I mean). I am hoping to be able to do the thing in one go and avoid this problem; I know there will still be distortion, but am hoping it will be a single sweep of distortion that can be more easily fixed. Do you know if doing it in one go achieves this (i.e. simpler distortion compared to the multiple distortions that occur with doing the files in stages)?

    Thanks also for the idea about enabling 3D hardware (GPU) support. I do have a good card, so will try this (though I have read conflicting accounts of whether this actually helps or not)...

    Once I get CS5 installed, and perhaps more RAM (if needed), I will report back!

    Ed

  19. #19
    Member
    Join Date
    Apr 2008
    Posts
    210
    Post Thanks / Like
    Images
    14

    Re: Stitching multiple 40MP files - computer 'grunt' required

    May I ask a question related to the above? Early versions of Photoshop limited the size of a file that PS3 and earlier could open to 30,000 pixels wide or less. Now with PS5, I can open and edit much larger panoramas with relative ease on my i7 Windows 7 64bit machine (some third-party plugins refuse to work properly, however). When it comes to saving and uploading for printing, I need to reduce the pixel dimensions to less than 30,000 wide again, otherwise PS5 won't let me save as a JPEG. My last steps in PS5 are sharpening, convert to sRGB and reduce bit depth. But saving as a JPEG doesn't seem to be possible. Where is the limitation, how can I circumvent this? I gave up in-house printing some years ago.
    Thanks, -Christopher

  20. #20
    Senior Member etrump's Avatar
    Join Date
    Jan 2009
    Posts
    1,206
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    My suggestion is to convert to 8 bit tiff, stitch, then back to 16 bit. Any manipulation after you stitch will be much smoother using 16 bit.

  21. #21
    gimlor
    Guest

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Ed HUrst View Post
    Hey guys - thanks for all the suggestions and ideas.

    I shall certainly use 8 bit files if I need to (with my current CS3 set up and its lack of access to RAM, that made no difference with 23 files, but maybe it could allow me to do it with CS5 and about 15gb of RAM, if it won't do it with 16 bit files). As for doing the stitching in sections, see my notes on this above - I have found that doing this messes up the perspective in a complicated way that is hard to fix later; it creates 'bowing' around the centre of each of the frames I create as an intermediate step which then means that the overall file at the end has a strange set of multiple distortions (if you know what I mean). I am hoping to be able to do the thing in one go and avoid this problem; I know there will still be distortion, but am hoping it will be a single sweep of distortion that can be more easily fixed. Do you know if doing it in one go achieves this (i.e. simpler distortion compared to the multiple distortions that occur with doing the files in stages)?

    Thanks also for the idea about enabling 3D hardware (GPU) support. I do have a good card, so will try this (though I have read conflicting accounts of whether this actually helps or not)...

    Once I get CS5 installed, and perhaps more RAM (if needed), I will report back!

    Ed
    Np, i'm curious to hear back from you as i never did something like that myself Btw, most modern GPUs beat any normal CPU when it comes to math operations so that is what i'm hoping will speed things up. (assuming CS5 can work in full mode with the card you have)

  22. #22
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I don't have a modern Mac, but if i am looking to buy a new Mac computer for photos processing and stitching, what specifications i should look at? Minimum or standard[can't go for maximum as it will cost too much, so will keep minimum or average and will upgrade things later if it is upgradable].
    Tareq

  23. #23
    Senior Member
    Join Date
    Oct 2008
    Location
    Munich
    Posts
    876
    Post Thanks / Like
    Images
    1

    Re: Stitching multiple 40MP files - computer 'grunt' required

    It depends how much you want to spent. You could probably go as low as 1000EUR for a very fast pc, and go till 10000EURs. For a MAC I would say you have to ad around 10-30% of costs to get the same performance. From a PC stand point I would go for a fast quad-core, 16GB of RAM, a SSD as OS drive and the other stuff as you need. You can save a lot on the graphic card, or waste a lot of money. If by any chance Adobe or any other company would start to use the graphic card, you can still upgrade later.

  24. #24
    Senior Member
    Join Date
    Oct 2008
    Location
    Munich
    Posts
    876
    Post Thanks / Like
    Images
    1

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by gimlor View Post
    Np, i'm curious to hear back from you as i never did something like that myself Btw, most modern GPUs beat any normal CPU when it comes to math operations so that is what i'm hoping will speed things up. (assuming CS5 can work in full mode with the card you have)
    CS5 uses the GPU only for minor things. There isn't a real speed difference whether you use a 100eur card or a 5000eur card. Sadly but true.

  25. #25
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Christopher View Post
    It depends how much you want to spent. You could probably go as low as 1000EUR for a very fast pc, and go till 10000EURs. For a MAC I would say you have to ad around 10-30% of costs to get the same performance. From a PC stand point I would go for a fast quad-core, 16GB of RAM, a SSD as OS drive and the other stuff as you need. You can save a lot on the graphic card, or waste a lot of money. If by any chance Adobe or any other company would start to use the graphic card, you can still upgrade later.
    Quote Originally Posted by Christopher View Post
    CS5 uses the GPU only for minor things. There isn't a real speed difference whether you use a 100eur card or a 5000eur card. Sadly but true.
    I know it depends on budget, but i was thinking what is the minimum i should go with, i may buy a Mac computer and then find out that it is even not at minimum requirements, sure i will go with specifications more than my current Macs i have already, but as i said, i can't spend too much money as i am not lucky as most people here, and i said that i may upgrade later, so if i go with 8GB or 16GB i can upgrade to 32 in the future, this is what the salesman told me last time i checked Mac system, also now sure what Processor i should go with, 8-core, 6? 12? i5? i100? and Graphics card, what is the story behind it? I really can't understand why one GC can be better or worse than another even if they both in same memory buffer or size or whatever, i think the most important thing i need the computer for is if i will stitch large files from MF or even 35mm DSLRs.
    Tareq

  26. #26
    Senior Member
    Join Date
    Oct 2008
    Location
    Munich
    Posts
    876
    Post Thanks / Like
    Images
    1

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Ok here we go. I assume you are interested in Mac Pro. Here is the problem. You are really limited. There are only 2 main choices. A single CPU or dual CPU computer. The difference between both besides the CPU count is, that the single CPU can have up to 32GB if RAM and the other can have up to 64GB. Both use Intel Xeon models. You can't have a i5 or i7. I would say there isn't a big need fot 32GB of RAM.

    Just an example: to get 16Gb of RAM out of 4 slots it would cost around 100US, however if you wanted to use only 2 (so that later you can go to 32GB) it would already cost you around 400US. (Same quality of Memory)

    The most important point if you want to save money, but have to get a MAC is, buy it nearly empty and upgrade it. You will save so much money.

    Here are a few numbers. To go from 3 to 16Gb of RAM Apple charges 775US. If you find somebody to do it it shouldn't be more than 200US.

    A 2TB HD costs 300 with apple, the drive alone is around 140-200US

    So to summarize:
    As I said I would go for a fast quad-core, 16GB of RAM, a SSD as OS drive.

  27. #27
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Christopher View Post
    Ok here we go. I assume you are interested in Mac Pro. Here is the problem. You are really limited. There are only 2 main choices. A single CPU or dual CPU computer. The difference between both besides the CPU count is, that the single CPU can have up to 32GB if RAM and the other can have up to 64GB. Both use Intel Xeon models. You can't have a i5 or i7. I would say there isn't a big need fot 32GB of RAM.

    Just an example: to get 16Gb of RAM out of 4 slots it would cost around 100US, however if you wanted to use only 2 (so that later you can go to 32GB) it would already cost you around 400US. (Same quality of Memory)

    The most important point if you want to save money, but have to get a MAC is, buy it nearly empty and upgrade it. You will save so much money.

    Here are a few numbers. To go from 3 to 16Gb of RAM Apple charges 775US. If you find somebody to do it it shouldn't be more than 200US.

    A 2TB HD costs 300 with apple, the drive alone is around 140-200US

    So to summarize:
    As I said I would go for a fast quad-core, 16GB of RAM, a SSD as OS drive.
    Yes, i will buy a Mac Pro.

    Well, i was thinking to have a budget mostly about $2000 for that Mac Pro, i can add few more bucks if needed, but not too much like $3000 and above.
    Tareq

  28. #28
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Stitching multiple 40MP files - computer 'grunt' required

    OWC sells ram and right now for the Mac Pro seems like very good prices. Not sure which MP you are getting and you may want to look at Apples refurbished models. But check out some of the ram prices here

    http://eshop.macsales.com/shop/memor...ry#1333-memory
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  29. #29
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Here are some current offerings from Apple on refurbished models.


    http://store.apple.com/us/browse/hom...co=MjEwNzM3NTk
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  30. #30
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Thanks, nice offers for the RAM, but i can't decide now until i buy Mac Pro and see.
    Tareq

  31. #31
    Administrator, Instructor Guy Mancuso's Avatar
    Join Date
    Oct 2007
    Location
    Arizona
    Posts
    23,623
    Post Thanks / Like
    Images
    2555

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Buy everything outside of Apple for sure. OWC pretty much has everything you need and I would get your ram there and I do use there SSD drives also. So always buy from Apple the most you can buy with regards to processors since you can't change or add later.
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  32. #32
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Should i go with Quad core or 8 core or 12?
    Tareq

  33. #33
    Senior Member stephengilbert's Avatar
    Join Date
    Nov 2007
    Location
    Santa Monica, CA
    Posts
    2,272
    Post Thanks / Like
    Images
    2

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Tareq,

    You might want to read Lloyd Chambers' guide to configuring the Mac Pro here: http://macperformanceguide.com/Mac-H...reAMacPro.html

  34. #34
    Super Duper
    Senior Member
    etrigan63's Avatar
    Join Date
    Nov 2007
    Location
    Earth, Sol System (near Miami, FL)
    Posts
    2,501
    Post Thanks / Like
    Images
    21

    Re: Stitching multiple 40MP files - computer 'grunt' required

    +1 to Guy's suggestion about OWC (http://www.macsales.com) and I will add that their RAM is guaranteed for life. I had a couple of sticks of 2GB RAM get a bit wonky after upgrading to OS X Lion and they swapped them out no problem. I bought this RAM in 2008. My suggestion is to order a Mac Pro with the CPU horsepower and video card you need. Then go to OWC to bump up the RAM. SATA hard drives are super simple to install on a Mac Pro and you can pick those up cheap at CompUSA/TigerDirect if you are in the USA.
    Carlos Echenique | Carlos Echenique Photography |Olympus OM-D E-M1 MK II | Olympus Pen-F - M.Zuiko 17mm f/1.8, M.Zuiko 25mm f/1.8, M.Zuiko 45mm f/1.8, Rokinon 12mm f/2 NCS, M.Zuiko 75mm f/1.8, M.Zuiko 12-40mm f/2.8 PRO, M.Zuiko 40-150mm f/2.8 PRO

  35. #35
    Senior Member Lars's Avatar
    Join Date
    Nov 2007
    Location
    Sunnyvale, California
    Posts
    1,811
    Post Thanks / Like
    Images
    19

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Whatever you do, spend the money on RAM and SSD before incremental CPU upgrades.
    Monochrome: http://mochro.com

  36. #36
    Senior Member
    Join Date
    Oct 2008
    Location
    Munich
    Posts
    876
    Post Thanks / Like
    Images
    1

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Sorry but you want to spend around 2000-3000 and get 8 or 12 cores ? The 8 core, which has 2 Quad core CPUs, will cost around 3500 without any extras and the 12 core starts at 5000US.

  37. #37
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I was talking about 6-core, but if i will go with 8-core as final decision then i will put minimum $3000+, i found a Mac Pro 8-core with good specifications around $3200, i may get it around $3000, no rush.
    Tareq

  38. #38
    New Member
    Join Date
    Jul 2011
    Location
    Dundas, Ontario, Canada
    Posts
    10
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I've stitched panoramas with 8 to 12 frames from a P65+ (60 megapixel, 16bit TIFFs) on a 2009 quad-core 2.66 MacPro with 16GB on CS5 without any performance issues. I just re-ran an 8 frame panorama and it took about 7 minutes in CS5.

    The other program you should consider is PTgui. I ended up using it for the final stitched image because CS5 left an odd grid in an area of the image which PTgui didn't.

    If you've only got one panorama to do, just leave it run overnight.

    Martin

  39. #39
    Subscriber gogopix's Avatar
    Join Date
    Nov 2007
    Posts
    1,383
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I woill also endorse PTGui. It is based on Pano Tools, a very sophisticated pano app developed in academia, and the interface has really improved. I've tried a half dozen and PTGui seems the best, esp for IQ

    Victor

  40. #40
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    I bought PTGui so i will use it definitely, no point i buy it and not use it at all, and i tested it beside PS, PTGui won my vote, i have another software but i didn't test it yet [pano giga or something similar, gigapan maybe].
    Tareq

  41. #41
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Right! I can report back on some results...

    I have now got CS5 installed on my Mac Pro. I have 16GB of RAM, of which approx. 14GB is allocated to Photoshop (which represents 90% of the total RAM - probably not the best % from an efficiency point of view, but I didn't want it to max out the RAM). The machine itself has 2.93 GHz Intel Xeon processors (8 core).

    I set CS5 the task of stitching 23 files simultaneously, each from the 645D. It took 20 minutes to do the automatic aligning stage. It then took almost exactly an hour to do the auto blending of the files. Then a further 10 minutes to actually render this blended (and still layered) file on the screen.

    The other thing I can report is that blending all the files at once does indeed deliver a much better result (in terms of perspective / distortion) than blending the individual files in batches, then joining those blended files together (which was something I did as a workaround when I had access to less RAM).

    Altogether a successful and interesting exercise.

    This is 'hot off the press', so all I can show you is a file that is as yet not fully tidied up. But, just to show the initial result, see attached file.

    I plan to get 32GB of RAM, so will repeat the exercise then.

    Ed

  42. #42
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Sorry that the file is not attached - having some trouble with that for some reason...

  43. #43
    Senior Member
    Join Date
    Feb 2009
    Posts
    1,083
    Post Thanks / Like
    Images
    6

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Quote Originally Posted by Ed HUrst View Post
    Sorry that the file is not attached - having some trouble with that for some reason...
    How big the size of this file?
    Tareq

  44. #44
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    It is only 282k, so not sure what was going wrong! Anyway, let me try again now...

  45. #45
    gimlor
    Guest

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Looks really nice !

  46. #46
    Senior Member Ed Hurst's Avatar
    Join Date
    Sep 2008
    Location
    Sydney
    Posts
    1,161
    Post Thanks / Like

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Thanks! Now that I have the computing power to do this sort of stitching, I think I will go back to the individual files here and pull more detail out of the dark area on the bottom right... The redo the whole thing!

    BTW, I have just obtained 32GB of RAM, so I will report back on the difference this makes to the performance of the stitching job.

  47. #47
    Senior Member Lars's Avatar
    Join Date
    Nov 2007
    Location
    Sunnyvale, California
    Posts
    1,811
    Post Thanks / Like
    Images
    19

    Re: Stitching multiple 40MP files - computer 'grunt' required

    Congratulations on your new monster.
    Monochrome: http://mochro.com

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •