HDR RAW Workflow and dark exported HDR files  

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pana2000
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HDR RAW Workflow and dark exported HDR files

by pana2000 » Sat Nov 14, 2015 6:18 am

Hi


A. Have read a bit about HDR workflows where images are adjusted in LR prior to APG

I find it easier to visualize the overall adjustments in exposure contrast and color when looking at the whole stitched image

Is there a workflow option to start with RAW files stitch in APG Then adjust in LR or similar but retain RAW quality for later adjustment in the output from APG ?

B. Looking at HDR exports I have tested which the image is fairly dark Is the dark image the nature of the HDR export And what is the best workflow to adjust the HDR export ( so it is usable ) for loading onto the web ?

Thanks Lloyd

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Re: HDR RAW Workflow and dark exported HDR files

by Parentesi » Mon Nov 16, 2015 8:43 pm

1. RAW process the images in LR
a. Use Lens-correction for Color/Chromatic and light-falloff. Do not use Lens distortion correction.
b. Eventually work with adjusting highlights, Shadows. But only a little.
c. Adjust Exposure if needed(Can go up to 2EV, but same on all brackets is recommended)
d. Export as 16Bit Tiff, uncompressed (Now you could work on the images if you need to clean something before stitching)

2. Ad images to Autopano
a. Detect images
b. Eventually adjust, rotate, Mask. (Masks does not work somehow on 360x180 Bracketed Panoramas)
c. Export as 3 Layers 16bit Tiff, ZIP compression
d. Use PTGui to render the final HDR (Autopano results look crappy when rendering out a HDR of three layers, especially in night-shots. Some areas are fine, some are very grainy and color-mismtches all over)

2b. Only use PTGui to render your final HDR
Autopano is better in adjusting miss-aligned images, especially when the Nodal-point was not 100% accurate. That is where PTGui has its flaw.
Masking works much much better though in PTGui Pro

3. Now if you want to have a final result, you will have to tonemap your HDR in any HDR program. I say what suits your style the best. Or just downgrade it to 16Bit in PS and then work in LR

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Re: HDR RAW Workflow and dark exported HDR files

by pana2000 » Mon Nov 16, 2015 9:08 pm

Thanks Parentesi

That a very thorough breakdown

Regards Lloyd

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Re: HDR RAW Workflow and dark exported HDR files

by Parentesi » Mon Nov 16, 2015 9:27 pm

when downgrading in PS, use: EXPOSURE AND GAMMA - As this will give it the most natural look, even though you have the lessest options to do anything.
If you use Local Adaption, try to just get all the highlights and Shadows visible, a 16bit file as Tiff later has still more Dynamic range then any RAW file. That then works very good in LR.

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Re: HDR RAW Workflow and dark exported HDR files

by pana2000 » Sun Nov 22, 2015 1:06 am

Hi Parentesi

Im guessing the reason my files are coming out of APV fairly dark is due to all the range of exposure being compressed into the file ?

Thanks Lloyd


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