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General photography questions and answers: Discuss HDR...How do i convert a photo to hdr. Cause I've got one and that would be a nice one to ...
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Old 11-09-2008, 22:12   #1 (permalink)
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HDR

How do i convert a photo to hdr. Cause I've got one and that would be a nice one to convert.

I can't find anything in pixalo about hdr
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Old 11-09-2008, 22:28   #2 (permalink)
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Re: HDR

you mean a set of bracketed images or just one image
if its a set you can use Photomatix Pro (There's many other ways but that's pretty much the best way), and if it's just one, you have to adjust the image, set different exposures to it first then convert to HDR.
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Old 11-09-2008, 22:31   #3 (permalink)
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Re: HDR

There is a tutorial somewhere by Orangepeel but could not find it. Latest edition of PP has an article.
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Old 11-09-2008, 22:37   #4 (permalink)
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Re: HDR

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Originally Posted by Dutchie View Post
How do i convert a photo to hdr.
The best way is to start off with between three and five images of the same shot taken around one stop apart. (-1 to +1 stop with three). Depending on your individual shot, maybe more than one stop apart.

You can then blend the images together to give an image with an enhanced dynamic range.

You can cheat a bit if you have a RAW file. Process it at least twice to optomise the lightest and darkest parts of the image and combine these. This way is not as good as starting with three - five separate images.
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Old 11-09-2008, 22:48   #5 (permalink)
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Re: HDR

Quote:
Originally Posted by morlandroger View Post
There is a tutorial somewhere by Orangepeel but could not find it. Latest edition of PP has an article.
Roger
http://www.pixalo.com/community/tuto...ues-19805.html

http://www.pixalo.com/community/tuto...ing-18219.html
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Old 11-09-2008, 23:34   #6 (permalink)
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Re: HDR

Wow that looks really good though When I get around to it, I will give it a go. No i've only got the one image. But the building would be ideal for a hdr photo. So next time I will take my tripod with me and try again.
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Old 12-09-2008, 11:49   #7 (permalink)
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Re: HDR

If you took the image in RAW you can easily create an HDR from it. Just process the RAW as +2, normal and -2 stops. I think if memory serves me correct, also Photomatix can do this pseudoHDR from the RAW file directly.
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Old 12-09-2008, 17:13   #8 (permalink)
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Re: HDR

I am sorry to disagree with some of the previous postings. High Dynamic Range is characterised by combining multiple exposures. Artifically taking multiple exposures from a single Raw file does NOT increase the dynamic range captured by that Raw file. You are limited to the data contained within one Raw file. Ferrell McCollough (an HDR expert) describes a single Raw file as being Medium dynamic range (as you are limited to around 10 stops). True HDR may be 12 to 18 stops (or more) and a single Raw cannot capture this.

You can produce a good MDR image using a single Raw but producing several "exposures" and combining in Photoshop is slow and unnecessary. All you need to do is to open the Raw image in Photomatix (which will tell you that this is not real HDR without multiple exposure) and it will offer to tone map the single image. This produces excellent results and is easy to do and can make significant improvement particularly to those pics which have washed out (but not burnt out) skies but are otherwise good. Photomatix is using all of the data in the Raw file to maximise dynamic range and mapping all under your control.
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Last edited by Dave Canon; 12-09-2008 at 17:16. Reason: change of word
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Old 12-09-2008, 17:18   #9 (permalink)
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Re: HDR

Nah I will go and take some more shots and do the real hdr. It looks rather cool to me.
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Old 12-09-2008, 21:06   #10 (permalink)
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Re: HDR

Dave, thank you for the link!.
Orangepeel, WoW the effort and time you have put into this.
I very much appreciate how you cover with illustrations all the basics, even thinking of those of us who do not have many programs other than PP.
More power to your elbow...Kenny

Last edited by spacepacker; 12-09-2008 at 21:07. Reason: missing word
 
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