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FORUMS Post Processing, Marketing & Presenting Photos HDR Creation
Thread started 30 Aug 2017 (Wednesday) 22:26
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issues with shooting HDR in forest setting

 
Z10silver
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Joined Nov 2016
Post has been edited 1 month ago by Z10silver.
Aug 30, 2017 22:26 |  #1

I've often found it challenging to shoot HDR images in forests, where there may be strong contrast between sky and trees. One issue I've noticed, even when covering the full dynamic range of the image, is a haze-like effect around some of the trees (see images below). Almost like light is spilling around the tree. Does anyone know what causes this effect (diffraction?), and possible solutions?

Thank you
Zach


this 7-photo composite was shot at f/6.3, 17mm, ISO100


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kirkt
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Post has been edited 1 month ago by kirkt.
Aug 31, 2017 08:15 |  #2

Without seeing your source images it is difficult to give you a definitive answer. However, if I had to guess, I would go with flare in your longer exposures blooming into the adjacent dark areas. This is a function of your optics. You can address this during post-processing by using a darker exposure from your sequence, where flare is less evident, and compositing the trees from that image into your final image.

Also, different HDR applications handle merging differently, so the inclusion of these blooming areas into the final HDR image may also be the result of the merge algorithm used by your software (Photomatix perhaps?). Some applications permit you to do the above compositing (masking a part of one of the source images into the composite) directly in the HDR merge process - perhaps give this a try too.

kirk


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Z10silver
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Post has been last edited 1 month ago by Z10silver. 3 edits done in total.
Aug 31, 2017 09:51 as a reply to kirkt's post |  #3

Thanks Kirk, that sounds exactly right. The problem is, in the darker images, the trees look too dark - almost black. I was hoping to get some more detail in the shadows of the branches. I did use Photomatix with the "exposure fusion" setting... Is there a program you think would handle this better? Thanks!




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kirkt
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Post has been last edited 1 month ago by kirkt. 3 edits done in total.
Aug 31, 2017 10:58 |  #4

Z10silver wrote in post #18441375 (external link)
Thanks Kirk, that sounds exactly right. The problem is, in the darker images, the trees look too dark - almost black. I was hoping to get some more detail in the shadows of the branches. I did use Photomatix with the "exposure fusion" setting... Is there a program you think would handle this better? Thanks!


You could perhaps post a Dropbox link to your raw images here and let the forum members put the images through all of their favorite HDR applications and post the results. Most of the HDR apps have trials too, so you could put your troublesome image sets through the various apps too and see what works best. Mac or PC?

As far as incorporating a single good exposure for the trees, I would have to see what you have to work with, but you could probably push an underexposed image of the trees, with no bloom, pretty far and layer in the tree parts without too much of a deleterious effect on the overall image.

You could also try to use the current image and do some local burning of the tree areas to tone down the bloom (it looks like you finished the image in LR).

kirk


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Z10silver
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Aug 31, 2017 11:15 as a reply to kirkt's post |  #5

Sure, here' s a dropbox link. I use a mac.

https://www.dropbox.co​m ...jSLKUp3tOoZt-g0WwZla?dl=0 (external link)




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joedlh
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Aug 31, 2017 11:49 |  #6

If there was even a wisp of a breeze, it's due to movement in the leaves from one shot to the next.


Joe
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Editing ok

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Z10silver
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Aug 31, 2017 11:58 as a reply to joedlh's post |  #7

The leaves aren't really the issue - it's the tree trunks, and I don't think the effect is from movement.




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Stiga
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Sep 01, 2017 13:19 |  #8

I think the culprit is the tonemapper that you have chosen.

Thank you for uploading your 7 images. I loaded them into Photomatix 6 and prepared a radiance file (.hdr) I then tonemapped it in easyHDR, Photomatix 6 and SNS-HDR 2. The results are posted below

In all cases there was a little postprocessing - mainly shadow recovery.


Martin
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Stiga
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Sep 01, 2017 13:24 |  #9

easyHDR 3.10

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Stiga
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Sep 01, 2017 13:27 |  #10

Photmatix 6 (Tone Balancer method, Realistic preset)

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Martin
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Stiga
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Sep 01, 2017 13:29 |  #11

SNS-HDR 2

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MalVeauX
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Sep 01, 2017 13:50 |  #12

Heya,

I use Photomatrix 5, I just adjust the values manually and play around with the compression in the tone fuser.

Examples with trees:

IMAGE: https://farm4.staticflickr.com/3889/15197755231_5a47cbd697_c.jpg
[IMAGE'S LINK: https://flic.kr/p/p9Yt​9B] (external link)DPP_1460_tonemapped_ma​rked (external link) by Martin Wise (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5554/15097084661_3cb11f19e7_c.jpg
[IMAGE'S LINK: https://flic.kr/p/p15v​i8] (external link)DPP_1272_tonemapped_ma​rked (external link) by Martin Wise (external link), on Flickr

IMAGE: https://farm4.staticflickr.com/3877/14689251028_058b8695f7_c.jpg
[IMAGE'S LINK: https://flic.kr/p/oo3f​yL] (external link)DPP_0765_tonemapped_ma​rked (external link) by Martin Wise (external link), on Flickr

IMAGE: https://farm4.staticflickr.com/3840/14824683294_6738d64479_c.jpg
[IMAGE'S LINK: https://flic.kr/p/oA1n​RQ] (external link)DPP_0532_3_4_tonemappe​d_marked (external link) by Martin Wise (external link), on Flickr

IMAGE: https://farm6.staticflickr.com/5589/14798309231_93d3e686ef_c.jpg
[IMAGE'S LINK: https://flic.kr/p/oxFc​LB] (external link)DPP_0441And7more_tonem​apped_marked (external link) by Martin Wise (external link), on Flickr

Very best,

My Flickr (external link) :: My Astrobin (external link)

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kirkt
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Post has been edited 1 month ago by kirkt.
Sep 01, 2017 18:44 |  #13

Since you used LR as part of the process in your original image, I figured you could try using it to do the HDR merge and toning. Attached.

I used 3 exposures from your sequence in LR and toned in LR - I went light on the contrast, it could probably use more. Seems to work. Depending on how much flare remains, you can do some local burning and desaturation (if the flare has a cast) to neutralize it. Make sure to treat the CA fringing too. The second image is a 100% crop.

kirk

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Z10silver
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Sep 01, 2017 19:20 |  #14

Thank you guys for trying these out. Kirk, your results are closest to what I was going for. I have LR 5 so I don't have the HDR option but maybe I'll have to upgrade. I'm also curious if focus stacking might have helped with the flare...




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Z10silver
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Sep 01, 2017 20:43 as a reply to kirkt's post |  #15

Kirk, just to clarify, did you actually use the "Tone Curve" control panel in lightroom?




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issues with shooting HDR in forest setting
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