October 01, 2014, 08:31:05 AM

Author Topic: Singel Image HDR  (Read 4817 times)

TexPhoto

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Singel Image HDR
« on: September 15, 2013, 11:31:19 PM »
I find myself using Phtomatrix Pro 4 to edit some of my images that I did not shoot as HDR.  It does work just fine with a single image. (yes, i understand I am not getting as much Dynamic range as if I'd shot more images) I remember a few years ago, you could do this, but you had to use photoshop or something to make 3 images using the original file (hopefully RAW) to make 3 images with 3 different exposures.

I often use this for action photos where taking 3+ photos is not possible.

One thing I've found is I can layer the HDR on top of the original image in photoshop, and just adjust the top layer's opacity until I get a blend that just looks like it pops, but you would not see as an HDR.

Do you do this?  What is your Technique / Software?  Lets see some examples.
« Last Edit: September 18, 2013, 07:37:29 PM by TexPhoto »

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Singel Image HDR
« on: September 15, 2013, 11:31:19 PM »

jhanken

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Re: Singel Image HDR
« Reply #1 on: September 16, 2013, 12:25:12 AM »
I am a big fan of single image HDR in Photomatix for very subtle exposure fusion images.

Anyone that complains about Canon DR and hasn't tried this technique should reconsider their complaint.

Never used the PS layer trick, will have to try.
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alexanderferdinand

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Re: Singel Image HDR
« Reply #2 on: September 16, 2013, 03:07:05 AM »
Yes, sometimes it is very helpful.
So if you have a picture with very high contrast its worth to give it a try.
Backdraw: shadows can be awful noisy.

celliottuk

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Re: Singel Image HDR
« Reply #3 on: September 16, 2013, 04:57:49 AM »
This is a bit of a theoretical viewpoint
"High Dynamic Range" is an attempt to get over the inherent DR that sensors have. Expose for the mid-tones, and there's no shadow detail, and your highlights are blown out
HDR is an attempt to get round this by combining 3 or more shots exposed to capture highlight and shadow detail. But, we all knew that, so what's my beef?

"Tone Mapping" is an "Effect which increases local contrast. That's all you can do with a single shot. Applied sensitively, maybe masked with a straight shot as mentioned above, it can add drama and impact(Or be a complete mess if overdone)
Therefore my beef is, I wish people would use "Tone Mapping" when taking about an "Effect" that adds impact, and "HDR" when they are adding detail that their sensor can't quite handle.

TexPhoto

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Re: Singel Image HDR
« Reply #4 on: September 16, 2013, 09:32:30 PM »
Out sailing on a moonless night, 7 days away from land, 2AMish, my friend on watch and me asleep, I was woken by his screaming UFO!, UFO!  As I went up on deck, he grabbed at me screaming that UFO was after us.  In the distance bright and blinking lights flickered.

I reached for the radio and was soon talking to a Coast Guard Helicopter that explained they were looking for a sunken sail boat in the area.

After about 15 minutes of silence my friend came to me and began to explain that UFO means unidentified flying object, and that what he meant was that he did not know what it was.  The helicopter was conducting search patterns.

In any case HDR to me is an image that is enhanced with HDR software or technique.


REX_0897_tonemapped by RexPhoto91, on Flickr
« Last Edit: September 16, 2013, 09:43:50 PM by TexPhoto »

CarlTN

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Re: Singel Image HDR
« Reply #5 on: September 16, 2013, 09:40:30 PM »
I find myself using Phtomatrix Pro 4 to edit some of my images that I did not shoot as HDR.  It does work just fine with a single image. (yes, i understand I am not getting as much Dynamic range as if I'd shot more images) I remember a few years ago, you could do this, but you had to use photoshop or something to make 3 images using the original file (hopefully RAW) to make 3 images with 3 different exposures.

I often use this for action photos where taking 3+ photos is not possible.

One thing I've found is I can layer the HDR on top of the original image in photoshop, and just adjust the top layer's opacity until I get a blend that just looks like it pops, but you would not see as an HDR.

Photoshop CS5 can certainly do single shot HDR processing, as I have done with the below image.

http://www.canonrumors.com/forum/index.php?action=dlattach;topic=11600.0;attach=36771

TexPhoto

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Re: Singel Image HDR
« Reply #6 on: September 30, 2013, 09:45:15 PM »
Mostly I was talking about images where movement makes normal HDR impossible.


REX_1399 by RexPhoto91, on Flickr


REX_1399_tonemapped by RexPhoto91, on Flickr

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Re: Singel Image HDR
« Reply #6 on: September 30, 2013, 09:45:15 PM »

CarlTN

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Re: Singel Image HDR
« Reply #7 on: September 30, 2013, 10:08:20 PM »
Mostly I was talking about images where movement makes normal HDR impossible.


REX_1399 by RexPhoto91, on Flickr


REX_1399_tonemapped by RexPhoto91, on Flickr

Photoshop could do the same thing.

Pi

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Re: Singel Image HDR
« Reply #8 on: September 30, 2013, 11:40:53 PM »
This is a bit of a theoretical viewpoint
"High Dynamic Range" is an attempt to get over the inherent DR that sensors have. Expose for the mid-tones, and there's no shadow detail, and your highlights are blown out
HDR is an attempt to get round this by combining 3 or more shots exposed to capture highlight and shadow detail. But, we all knew that, so what's my beef?

"Tone Mapping" is an "Effect which increases local contrast. That's all you can do with a single shot. Applied sensitively, maybe masked with a straight shot as mentioned above, it can add drama and impact(Or be a complete mess if overdone)
Therefore my beef is, I wish people would use "Tone Mapping" when taking about an "Effect" that adds impact, and "HDR" when they are adding detail that their sensor can't quite handle.

Actually, HDR is an attempt to fit more DR in a standard medium; typically and image processed with a standard curve. It can come from a single RAW file since the conversion always clips a few stops, even with a Canon sensor. Tone mapping is how you do it. A quick way is to play with the highlights and the black level in LR, decrease the contrast and increase the "clarity" to otherwise absurd levels. Converting several images and blending them would be better since the LR controls are not powerful enough for tone mapping.

If your image is captured by a Nikon sensor, .... I will stop here because I can see how a few people are jumping their guns already.

gurflob

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Re: Singel Image HDR
« Reply #9 on: September 30, 2013, 11:56:15 PM »
This one was a pretty big struggle to edit and I wish I had taken 3 bracketed shots, but I'm proud of the result and I don't think I can go back to Switzerland any time soon.

Towering Alps by ncheng93, on Flickr
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CarlTN

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Re: Singel Image HDR
« Reply #10 on: October 01, 2013, 01:26:39 AM »
This one was a pretty big struggle to edit and I wish I had taken 3 bracketed shots, but I'm proud of the result and I don't think I can go back to Switzerland any time soon.

Towering Alps by ncheng93, on Flickr

The halo around the foreground ridge is not appealing to me personally, but it's a nice picture of a beautiful place!

gurflob

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Re: Singel Image HDR
« Reply #11 on: October 01, 2013, 08:39:20 AM »
The halo around the foreground ridge is not appealing to me personally, but it's a nice picture of a beautiful place!

Thanks! I agree, I tried to get rid of the halo behind the trees as much as possible at the time. I may revisit it soon if I can find the RAW.
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Re: Singel Image HDR
« Reply #11 on: October 01, 2013, 08:39:20 AM »