Use of HDR in Advanced Editing - DPChallenge Forums

Canon EF 17-40mm f/4.0L USM

06/04/2007 07:46:08 AM · #1

Let me start by stating that I love the proper use of HDR as displayed in the third place entry in Elements (very deserving entry).

I see that

Nuzzerused HDR with more than 2 exposure settings in HDR. My understanding of using HDR by the techniques of Photomatix, the photog takes an image in RAW and then saves individual copies of the same image at various exposure levels (in the case of the third place entry - 8).

On reading the Advanced rules I set that the rules state that "You may: overlay two copies of the same original file and process them differently to enhance dynamic range."

So, the question for the field - Is HDR really allowed in Advanced editing when using more than 2 copies of the same image?

I really don't mean to stir a hornet's nest - I just want to know what is allowed...

Judi

Canon EOS-5D Mark III

06/04/2007 07:51:34 AM · #2

Yes it is. As long as they all came from ONE exposure.

What is NOT allowed is when you take two photos of the same location but with different exposure settings and then try to use them together.

Sigma 150-600mm f/5-6.3 DG OS HSM | C

06/04/2007 07:56:13 AM · #3

Thanks Judi - that is what I see, but it is not what I read when reading the rules. I guess at DPC 2 = 8. I love new math....

Originally posted by Judi:

Yes it is. As long as they all came from ONE exposure.

What is NOT allowed is when you take two photos of the same location but with different exposure settings and then try to use them together.

BHuseman

Nikon D750

06/04/2007 08:20:57 AM · #4

Originally posted by pccjrose:

Thanks Judi - that is what I see, but it is not what I read when reading the rules. I guess at DPC 2 = 8. I love new math....

Originally posted by Judi:
Yes it is. As long as they all came from ONE exposure.

What is NOT allowed is when you take two photos of the same location but with different exposure settings and then try to use them together.

Interesting point that you make here. The rules do say you may overlay two coppies. I don't see where it says multiple to allow up to 8. Gorgeous picture but does it follow the rules?

Judi

Canon EOS-5D Mark III

Canon EF 17-40mm f/4.0L USM

06/04/2007 08:22:05 AM · #5

Without looking back on previous entries (it is late and I am tired) I am pretty sure there have been many entries using more than 2 copies of an exposure..and they have been passed.

I will try to find some.

fotomann_forever

06/04/2007 08:25:27 AM · #6

Originally posted by pccjrose:

I guess at DPC 2 = 8.

That's a conservative estimate ;-)

Judi

Canon EOS-5D Mark III

Canon EF 17-40mm f/4.0L USM

06/04/2007 08:31:09 AM · #7

Here you go -

4 exposures (Expert Editing)
Red Ribbon

5 exposures (Advanced Editing)
Red Ribbon

3 exposures (Advanced Editing)
Yellow Ribbon

There are heaps more..just a matter of looking.

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

06/04/2007 08:42:06 AM · #8

The thing is - I love this technique and hope it is allowed in Advanced editing - maybe the rule set wording needs to be updated to reflect teh reality so that novices to the site can use the technique to the fullest.

Originally posted by Judi:

Here you go -

4 exposures (Expert Editing)
Red Ribbon

5 exposures (Advanced Editing)
Red Ribbon

3 exposures (Advanced Editing)
Yellow Ribbon

There are heaps more..just a matter of looking.

Dirt_Diver

Nikon D3s

06/04/2007 08:48:31 AM · #9

I think that what DPC and Judi are trying to say is that you can dup the layer and create another layer of the bottom or background layer. They say 2 but it's a reresentation that you can create multiple layers of that sinlge background image. No where does it state that you can't not going any higher than 2.

Strikeslip

Canon EOS-5D

Canon EF 100-400mm f/4.5-5.6L IS

06/04/2007 08:51:51 AM · #10

I used nine different exposures derived from the same RAW file for this ribbon shot:

But now I've discovered that I can open a RAW file directly into Photomatix, and I can't notice a difference between the single step versus the nine step, though I haven't tested it out extensively.

Word-UP to my man,

Nuzzer for giving team Trigger Happy a tough goal to shoot for if we want to get top team score!!! Way to go

Nuzzer!

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

06/04/2007 08:53:44 AM · #11

For clarity, it should probably say "two or more copies." In practice, it's rarely if ever a distinct benefit to overlay more than two anyhow, but the fact is, we do allow more, if they are all processed from the same original capture.