Iliah Borg

Lives in United States AK, United States
Has a website at http://www.libraw.org/
Joined on Nov 11, 2002

Comments

Total: 171, showing: 1 – 20
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On article Pentax K-1 II Review: A worthy upgrade? (1423 comments in total)
In reply to:

anticipation_of: The good news is that this should be an easy firmware fix, since all they really have to do is go back to what they were doing in the K-1. If that happens, would DPR consider revising their rating?

> an easy firmware fix
Easy fix of what, banding? Anything but easy, and anything but fast, involves individual processing of each scan row. Do you think NR in raw for this camera is a caprice?

Link | Posted on May 8, 2018 at 15:14 UTC
In reply to:

Roadrunnerdeluxe: As a Pentax K-1 user I can tell you that pixel shift is just amazing! Given the more potent sensor in the Sony, the results should be even better. Since you get a true color readout and not an interpolated educated guess on which color should be where, this is the ultimate black and white mode allowing for unprecedented tonality and malleability of the files in either color or B/W.

@Impulses
With current Sony recording scheme, all 4 individual frames that are going into a pixel-shifted version are separately available, no need to shoot an extra individual frame.

Link | Posted on Mar 10, 2018 at 15:12 UTC
In reply to:

MedicineMan999: Will this software......
Say I'm shooting super macro and want to use PixelShift with the A7Riii.
Say I'll have 40 shots at the end of the run=80 total quartets.
Will this software automate the process combining all of the individual quartets and spit out 40 DNGs ?
It would be nice if Zerene Stacker could process DNGs too.

> Will this software automate the process combining all of the individual quartets and spit out 40 DNGs ?

Yes.

Link | Posted on Mar 10, 2018 at 15:10 UTC
In reply to:

Digital Imaging Technician: Well, it has to be linear DNGs, right? So, that means it's demosaiced data, not really a raw file in the traditional meaning.

There is no need in demosacking when all colour components for a pixel are known. So, no, it is not demosaicked data.

Link | Posted on Mar 10, 2018 at 01:25 UTC
In reply to:

techjedi: Would there be any reason to save the original 4 .ARW files after running this to create the .DNG?

I'm all for better examples in a new blog, together with raw files for those examples

Right now I have no problem stacking conversions, one from the combined pixel-shifted file, the others from individual frames, demosaicked; and using masks to replace the areas of the composite pixel-shifted file that are affected with motion using individual frames. The bonus is that I can select which individual frame will be the donor.

> exporting the motion mask ... you can do that, but you don't have to

I never said it is obligatory. I read this phrase as further manual processing may be needed.

Link | Posted on Mar 10, 2018 at 00:56 UTC
In reply to:

techjedi: Would there be any reason to save the original 4 .ARW files after running this to create the .DNG?

You may want to compare to the single frame to see why I'm not fully satisfied with the suggested solution. Please also see that they are exporting motion mask for further manual processing.

Link | Posted on Mar 10, 2018 at 00:22 UTC
In reply to:

Fotoni: Motion is a problem for pixel shift, so the process should be as fast as possible. Sony decided to make inferior pixel shift which is weird. Sony has these strange solutions like that uncompressed RAW, but no lossless RAW which is waste of space and bandwidth. Latest problem is PDAF stripes which show as dotted lines when shooting certain types of highlights.

@zkz5
If for some reason losslessly/ Huffman compressed raw file is corrupted, recovery is close to impossible. With uncompressed formats, on the other hand, the damage is local.

Oddly enough, if the proper backup procedure is in place, that is the only question is the disk size/model and how/when to round-robin the disks, it doesn't matter what is the size of the raw.

But when (and that's mostly how it is, especially in the field - that's why we receive massive recovery requests, and often the only thing we can help with is extraction of embedded JPEGs) the procedure is consumer-level or simply absent, uncompressed files are the safer option.

Link | Posted on Mar 9, 2018 at 23:49 UTC
In reply to:

techjedi: Would there be any reason to save the original 4 .ARW files after running this to create the .DNG?

@ogniw
This is from a single frame:
https://pixls-discuss.s3.amazonaws.com/original/2X/e/ed57f97d73ec2dc6f80256a6e8e57bf812682fc0.jpg
This is a composite using different applications over the pixel-shifted version of the shot:
https://pixls.us/articles/rawtherapee-and-pentax-pixel-shift/IMGP0597-Area01-combined.png
The article with those images is here: https://pixls.us/articles/rawtherapee-and-pentax-pixel-shift

Link | Posted on Mar 9, 2018 at 23:30 UTC
In reply to:

GrtFS: Will it handle Motion Correction?

@GrtFS
https://pixls.us/articles/rawtherapee-and-pentax-pixel-shift/IMGP0597-Area01-combined.png

Link | Posted on Mar 9, 2018 at 22:50 UTC
In reply to:

PhozoKozmos: LibRaw for win+mac pc's only
no android option

@jlabate
It is the size of compressed DNG file. To make it, we still need to allocate space for 4 full files plus the uncompressed result. Any further processing of such DNG will decompress it back.

Link | Posted on Mar 9, 2018 at 19:12 UTC
In reply to:

techjedi: Would there be any reason to save the original 4 .ARW files after running this to create the .DNG?

IMHO yes. Apart from the mantra "do not discard the originals", if you have discovered some motion/ shake artifacts, you may want to revert to a single ARW; and it is possible that after some time a solution to handle motion / shake will emerge, and it will work from the original ARWs.

Link | Posted on Mar 9, 2018 at 17:51 UTC
In reply to:

PhozoKozmos: LibRaw for win+mac pc's only
no android option

> 150mb DNG (A7RIII 42mp) is manageable on android

One, maybe. A collection and a workflow, not my experience.

Link | Posted on Mar 9, 2018 at 17:47 UTC
In reply to:

GrtFS: Will it handle Motion Correction?

No, in our experience motion correction is better handled from individual raw files, with manual intervention. We are not quite happy with automated solutions that we saw / tried. First, the base frame needs to be selected, which is problematic in automated workflow. Next, it may need manually adjusted masks.

Link | Posted on Mar 9, 2018 at 17:39 UTC
In reply to:

PhozoKozmos: LibRaw for win+mac pc's only
no android option

Not sure what can be done with a collection of raw files on an android, given a single pixel-shifted DNG file is about 150 megabytes.

Link | Posted on Mar 9, 2018 at 17:27 UTC
In reply to:

ozturert: Pentax, Olympus and Panasonic can do stitching in-camera, with Sony you have to use PC. I think new generation Sony cameras are fast enough to do this, somehow Sony cannot provide this to users.

@ozturert
Thank you, you are most kind. The work is done by LibRaw team, and I'm not going to quit LibRaw ;-)

Link | Posted on Mar 9, 2018 at 17:12 UTC
In reply to:

ozturert: Pentax, Olympus and Panasonic can do stitching in-camera, with Sony you have to use PC. I think new generation Sony cameras are fast enough to do this, somehow Sony cannot provide this to users.

@SungiBr
I was under impression we are discussing raw, as SonyPixelShift2DNG is for raw. I'm not sure that going for a trouble to shoot pixel-shifted images all one wants is out-of-camera JPEGs, sort of defeats the purpose. As to Pentax pixel shift raw, I'm glad we agree, it is not combined in the camera and is only a container.

Link | Posted on Mar 9, 2018 at 16:37 UTC
In reply to:

tabloid: Re raw.....Will doing conversions cost quality.

The quality (including dynamic range), compared to 1 shot, is improved if motion and shake are under control. The raw data for red and blue components of a pixel is preserved, for the green component both green samples for a pixel are averaged. Thus no interpolation of missing values (demosaicking) is needed, which, in turn, increases the quality and resolution (moire, for example, is dramatically decreased).

Link | Posted on Mar 9, 2018 at 16:26 UTC
In reply to:

ozturert: Pentax, Olympus and Panasonic can do stitching in-camera, with Sony you have to use PC. I think new generation Sony cameras are fast enough to do this, somehow Sony cannot provide this to users.

Yes, they can. If there is shake or motion in the stitched image, you may want to get individual frames, or may be stuck with editing.

BTW, Pentax do not stitch in the camera, they pack the shots into a container.

Link | Posted on Mar 9, 2018 at 15:30 UTC
In reply to:

havoc315: Anyone know if it works with Lightroom? Or need to import photos directly into this software?

1. Use SonyPixelShift2DNG to produce a DNG file
2. Open it in Lightroom

Link | Posted on Mar 9, 2018 at 15:28 UTC
In reply to:

Tom Holly: All this for one stop? Life’s too short.

I shoot velvia occasionally. That has 5 stops of dynamic range. Hacking files to increase from 14 to 15 stops (or whatever it is). Couldn’t be bothered. I’d just buy a Sony if DR was that important.

@ Tom Holly : It's not "out of my way", it's called intellectual honesty. You have no supporting data, so you are trying evasion. Doesn't work. Nobody buys it. Bye-bye.

Link | Posted on Feb 14, 2018 at 04:55 UTC
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