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Thread: HDR..

  1. #21

    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    Thanks for all the help.
    One last question. I've tested lots and lots.
    I'm really weak in PP, especially the masks and layers.

    Normally, the tonemapped jpeg is on top of the layers. How about the +2, 0, -2 ? What's the order?

    Getting frustrated about the layers.
    Are you using photomatix to generate the HDR? If so there is no issue with masks and layers. As for the +2, 0 and -2 exposure it doesn't matter in photomatix which comes first. In fact in photomatix, you just select the number of files that you want to combine into the HDR pic.

  2. #22
    Member just2ofus's Avatar
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    Default Re: HDR..

    HDR can be used to bring out details. Though my rays are highlighted using dodging tool.

    When is the last time you tried something for the first time?
    http://flickr.com/photos/just2of-us/

  3. #23

    Default Re: HDR..

    Quote Originally Posted by teebs View Post
    Are you using photomatix to generate the HDR? If so there is no issue with masks and layers. As for the +2, 0 and -2 exposure it doesn't matter in photomatix which comes first. In fact in photomatix, you just select the number of files that you want to combine into the HDR pic.
    Yes, i'm using Photomatix.
    My problem is, the layers in Photoshop. The tutorial teaches to have the tonemapped jpeg on top. How about the +2, 0, -2?

  4. #24

    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    Yes, i'm using Photomatix.
    My problem is, the layers in Photoshop. The tutorial teaches to have the tonemapped jpeg on top. How about the +2, 0, -2?
    What tutorial are you talking about???

    If you are talking about using adjustment layers to do the editing in photoshop then I can understand what you are talking about. But why do you still need the +2, 0 and -2ev original files? Makes no sense since these 3 files have already been merged in photomatix to generate the HDR file.

    Just save the HDR as tiff format in photomatix, open the file in photoshop and do whatever additional processing you require. Then if you want to put on the web, just choose save for web in photoshop.

  5. #25
    Moderator ziploc's Avatar
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    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    Yes, i'm using Photomatix.
    My problem is, the layers in Photoshop. The tutorial teaches to have the tonemapped jpeg on top. How about the +2, 0, -2?
    1) If you've taken bracketed shots with different exposure values, just open them up in photomatix, and then follow photomatix's quick tutorial to create the hdr image.

    2) If on the other hand, you have taken just a single raw file, AND you have the newest version of photomatix, you can also do (1) above. If on the other hand you have an old version of photomatix which couldn't handle raw files, you'll need to create the rest of the frames with different exposure values in photoshop:
    • open the raw file in photoshop.
    • save the file as jpeg, e.g. "zero.jpg"
    • adjust the exposure by clicking image->adjustment->exposure. Do this on the original image and not new layer.
    • save the pic as jpeg under a different name, e.g. "plus2.jpg" if you have made a +2ev adjustment.
    • undo the exposure adjustment.
    • repeat adjusting the exposure some other exposure values.
    • save the pic as jpeg under a different name, e.g. "minus2.jpg" if you have made a -2ev adjustment.
    • after you have created all the required pics with different exposures, open them up in photomatix and follow the steps as in (1) above.


    Btw, in the tutorial of stuckincustoms.com that you're reading, starting from "Step 6 - Photoshop fun" are just additional steps to touch up the hdr pic of undesirable artifacts (e.g. ghosting of moving objects) using photoshop. I believe that's where you got confused. You do not need to do those steps if your pic have no such artifacts.

    Hope that helps.
    Last edited by ziploc; 16th April 2009 at 12:26 AM. Reason: clarifying

  6. #26

    Default Re: HDR..

    since you have some problems with masking, I'll try to help you with some misconceptions.

    to mask is to erase things you do not want in the photo.

    Masking is done with the brush tool with the colour being set to black. However to undo the mask, you can use white to paint over the area you want unmasked.

    The order of layers is up to you. Depends what you really want to bring out.. For example, the hdr tonemapped image should be on top. However you noticed theres lots of dark spots on your tone mapped layer.. so what you do is but the 0 exposure or +2 exposure layer directly under neath the tone mapped image. Than you mask the tone map image painting the dark spots with the black brush tool. this will bring out the brighter parts of the 0 or +2 exposure layer in the bottom.

    I think this is the easiest way to understand masking.

  7. #27
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    Default Re: HDR..

    I've been shooting and doing HDRs for a while with Photomatix Pro. So after reading this thread, I'd like to chip in with a few tips and notes...

    1. It is much simpler to do a 3 shots AEB on the camera rather than saving different exposures during post-processing. There are benefits of shooting in camera with diff exposures...too lengthy to explained here.

    2. Movement of objects is always an issue. While one can really do masking, etc on PS, I try to stay away from that because I'm rather lazy to do so much post-proc. During shooting, always observe the surroundings and sometimes, you can catch a right moment with minimal movements in the 3 shots. If in doubt, shoot more sets - one of the sets will turn out fine.

    3. Tripod is a must. Otherwise, drink less coffee to develop a steady hand. I have tried a few handheld 3-shots AEB, and they look alright after merging. I repeat...a tripod is a MUST.

    4. Photomatix Pro has an option of "Attempt to reduce ghosting effect...by moving objects". Turn this on if you suspect there are some movements. But it is not a full-proof solution.

    5. If possible, shoot in RAW rather than JPG...read up elsewhere if you want to know more about the benefits of RAW.

    6. Trial and error is part of the learning process. When I started doing HDR, the pictures sucked. The tweaking of Photomatix controls didn't make much sense. But with loads of practice, one can easily generate a nice looking HDR image within a few minutes. The more you know about each Photomatix control, the better you are in deciding how your HDR will turn out.

    7. Caution - not everyone in the photography faternity likes HDR. Some dismiss it as gimmicky. But if you think it kinda suits your taste, then just do it. But HDR is not a substitute for poor photography/technical skills - the basic theories of photography are still relevant.

    Here are some samples of my HDR works if anyone is keen...cheers!
    Family | Health | Happy-ness. . . my Flickr here

  8. #28
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    Default Re: HDR..

    ...and to add, there're a few books now on HDR, and you can easily find them at good bookstores.

    The one that I really like is by Ferrell McCollough, "Complete Guide to High Dynamic Range Digital Photography." Not sure if our NLB has it; I got this from Amazon.com.

    After reading such books, suddenly what you are doing in Photomatix becomes crystal clear.
    Family | Health | Happy-ness. . . my Flickr here

  9. #29

    Default Re: HDR..

    Quote Originally Posted by teebs View Post
    What tutorial are you talking about???

    If you are talking about using adjustment layers to do the editing in photoshop then I can understand what you are talking about. But why do you still need the +2, 0 and -2ev original files? Makes no sense since these 3 files have already been merged in photomatix to generate the HDR file.

    Just save the HDR as tiff format in photomatix, open the file in photoshop and do whatever additional processing you require. Then if you want to put on the web, just choose save for web in photoshop.
    I get the HDR file in a greenish pic. So i just save that greenish tiff file and process in Photoshop?

    Quote Originally Posted by ziploc View Post
    1) Btw, in the tutorial of stuckincustoms.com that you're reading, starting from "Step 6 - Photoshop fun" are just additional steps to touch up the hdr pic of undesirable artifacts (e.g. ghosting of moving objects) using photoshop. I believe that's where you got confused. You do not need to do those steps if your pic have no such artifacts.

    Hope that helps.
    Yes, that's where i'm confused about the layers..

  10. #30
    Moderator ziploc's Avatar
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    Default Re: HDR..

    Please read post #26 by Draken413o above for the explanation on layer masking, and see if it helps.

  11. #31

    Default Re: HDR..

    LifeInMacro,

    Your HDR is .

    Love the colours!

  12. #32
    Member just2ofus's Avatar
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    Default Re: HDR..

    Quote Originally Posted by LifeInMacro View Post
    ...and to add, there're a few books now on HDR, and you can easily find them at good bookstores.

    The one that I really like is by Ferrell McCollough, "Complete Guide to High Dynamic Range Digital Photography." Not sure if our NLB has it; I got this from Amazon.com.

    After reading such books, suddenly what you are doing in Photomatix becomes crystal clear.
    I've searched in our NLB but not a single book about HDR.
    When is the last time you tried something for the first time?
    http://flickr.com/photos/just2of-us/

  13. #33
    Moderator ziploc's Avatar
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    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    I get the HDR file in a greenish pic. So i just save that greenish tiff file and process in Photoshop?
    If photomatix generates a greenish hdr file and the greenish color is not in your original pics, you have probably overly adjusted (or did not adjust) some sliders. Redo photomatix and try different settings, paying particular attention to the sliders under "Tone Settings" and "Color Settings".

  14. #34

    Default Re: HDR..

    Ok.. Thanks for all the reply.. Very much appreciated.

    Will try again with my setting.. Will update you guys again.

  15. #35

    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    Ok.. Thanks for all the reply.. Very much appreciated.

    Will try again with my setting.. Will update you guys again.
    Maybe you can PM me the link to the 3 files you use for generating the HDR and I see whether the problem is with the files or with your HDR settings.

  16. #36
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    Default Re: HDR..

    Quote Originally Posted by VyNnNnNnN View Post
    LifeInMacro,

    Your HDR is

    Love the colours!
    Thank you. There's a lot of hours (and pain) of trying, trials and errors to get here. Movement was a problem, and so was colours and noise. But those are history...

    Quote Originally Posted by just2ofus View Post
    I've searched in our NLB but not a single book about HDR.
    OK, in that case must probably buy from bookshops - can try Riceball (Funan), Borders or Kinokuniya. There're other titles on HDR, but I still find the one by Ferrell McCollough from Amazon.com best.

    Have fun everyone.
    Family | Health | Happy-ness. . . my Flickr here

  17. #37
    Member RyuHendrabusa's Avatar
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    Default Re: HDR..

    I've got a question, in taking HDR, which is recommended: Changing the shutter speed or aperture width?

    I read from Photomatix tutorial, it says change to AV mode. But won't this affect the Depth of Field of the exposures?

    Sorry for hijacking a bit, TS... But since this is a thread on HDR, I think everyone can benefit from sharing this issue

  18. #38
    Moderator ziploc's Avatar
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    Default Re: HDR..

    If you're referring to step 1 of Photomatix tutorial, it said:

    Quote Originally Posted by Photomatix Tutorial - Step 1
    If your camera offers Auto-Exposure Bracketing (AEB), select the Continuous Shooting mode, make sure the camera is set to Aperture Priority, and select an exposure increment of +/-2. The camera will automatically vary the shutter speed each time the shutter button is pressed, taking several exposures spaced by two-stop increments.
    So you're right that they asked you to change to Av (aperture priority) mode. When you bracket in Av mode, you select the aperture value, and the camera will bracket by varying the shutter speed. Aperture setting is not changed.

  19. #39
    Member RyuHendrabusa's Avatar
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    Default Re: HDR..

    I see! Thanks for the clearing it!

  20. #40

    Default Re: HDR..

    One thing to note is try to not over do the saturation tab.. it makes your photo very funky yes.. but most people will hate you for killing their eyes.. hehe

    I find that strength less than 60, sat 40-60, luminosity -1 is a pretty good combination to get fairly realistic hdrs. This is from numerous attempts.. so try it out!

    oh errmm.. if you need inspiration or maybe examples... you can have a look at my terrible ongoing thread of hdrs I've done.

    My HDR Thread

    The first page is from a time when I thought I got a fairly good hdr.. which is not the case...

    the latest works are at the end. Do leave me comments if you like or dislike the work. =)
    Last edited by Draken413o; 17th April 2009 at 01:12 AM.

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