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9 votes

Synology app reduces DNG file size

Does this imply that during the backup the contens of the DNG file have been converted from a TIFF format to 8-bits JPEG? Yes. Personally at this point, I would regard the Synology system as not fit ...
Philip Kendall's user avatar
  • 21.9k
9 votes

Synology app reduces DNG file size

Conversion of iPhone Images to jpg is a "feature" of Synology's DS Photo app. Per the DS Photo page To ensure optimal compatibility with Photo Station, DS photo will convert photos in HEIC ...
Bob Macaroni McStevens's user avatar
8 votes

Is it possible to convert M-RAW or S-RAW to RAW after shooting?

Once you discard information before saving a file you can not later retrieve it. M-Raw and S-Raw files are lower resolution versions of the raw file created by the information produced by the digital ...
Michael C's user avatar
  • 175k
8 votes
Accepted

Is there a way to change the aspect ratio of a DNG file?

The DNG spec contains a tag DefaultScale: DefaultScale is required for cameras with non-square pixels. It specifies the default scale factors for each direction ...
mattdm's user avatar
  • 143k
7 votes

Why is Lightroom changing all the settings on my imported RAWs?

Check the Apply During Import pane's settings in the Import window (if you have the window minimized, expand to the full window with all the settings). Lightroom can automatically apply a preset ...
inkista's user avatar
  • 51.9k
7 votes
Accepted

How can I preview DNG files in OS X Finder, with changes?

The MacOS X feature that's responsible for showing you previews in Finder, Spotlight, standard file dialogs, etc., is called QuickLook. QuickLook needs an importer for each type of file that you'd ...
Caleb's user avatar
  • 31.7k
6 votes

Do phone cameras expose to the right?

I think you're under a misconception here. There's no evidence that the Android phone is doing anything but picking a middle exposure. The scene has a lot of dynamic range — it's a big difference ...
mattdm's user avatar
  • 143k
6 votes

16-bit wysiwyg image? Not RAW

You get the desired result if you convert you raw file to tiff. If you don't like "separate interpretation by every program" as you said in one of your comments, use manufacturers convertor - that ...
MirekE's user avatar
  • 5,205
4 votes

How can I interpolate each color individually (i.e. export an image just with Red Color) using dcraw?

dcraw can't do this directly, but it can do something which will get you pretty close: render each pixel as a grayscale, either with unscaled pixel values with -D ...
mattdm's user avatar
  • 143k
4 votes

Is there a way to change the aspect ratio of a DNG file?

I got a DNG image from iOS. I ran exiftool on it like this: exiftool -DefaultScale="4.0 3.0" IMG_9270.dng When opened in OS X's Lightroom or Photoshop it is de-...
derQuestions's user avatar
4 votes
Accepted

Wrong DNG colors but correct JPG. How can I "transfer" correct colors to the DNG?

RAW files are supposed to be edited and color corrected, that's their purpose - it is a digital negative (dng). When you make it positive you have control on how it becomes positive image that we see. ...
raviputcha's user avatar
3 votes

RAW (.dng) on my Phone (OnePlus 5) vs on Picasa 3 (Noisy)

Picasa is automatically applying exposure correction to your very dark image. Since this scene is intentionally very dark, this automatic is going wrong. It brightens the image up considerably, ...
ths's user avatar
  • 7,152
3 votes
Accepted

How do I find out whether TIF images have gamma correction or not?

When you view the image with a normal image viewer, is it mostly dark? If not, a gamma curve has been applied. That is, does it look like this? That's what you'll get with a pure dump of linear ...
mattdm's user avatar
  • 143k
3 votes

Why doesn't Adobe DNG converter recognize files from my new camera?

What you need to do is to upgrade your version of Adobe DNG Convertor. The reason is camera vendors make slight changes in RAW formats of (almost) every new camera they release. And Adobe every ...
Romeo Ninov's user avatar
  • 11.9k
3 votes

How can I interpolate each color individually (i.e. export an image just with Red Color) using dcraw?

I don't know of any raw converter (dcraw, ufraw, etc.) that will do this for you. But, if you have ImageMagick installed, you ...
twalberg's user avatar
  • 5,148
3 votes
Accepted

Do phone cameras expose to the right?

Do smartphone cameras generally expose to the right? That's not something you can generalize because there are lots of smartphones out there with lots of different sensors in them that behave ...
Blrfl's user avatar
  • 5,532
3 votes
Accepted

How and why does VueScan's TIFF and DNG output differ?

The image pixel data contained in raw TIFF and DNG files produced by VueScan is identical. This can be proved by extracting and comparing that data. This can be done using Linux ...
starfry's user avatar
  • 403
3 votes

Sharing Lightroom images in DNG with ability to undo/redo edits in another application?

Only Lightroom and Photoshop (specifically the ACR engine they share) are able to understand the proprietary edit information, whether it be embedded in the DNG or a sidecar XML file. In fact, it's ...
ths's user avatar
  • 7,152
3 votes
Accepted

Sharing Lightroom images in DNG with ability to undo/redo edits in another application?

Are there any applications other than Lightroom in which I can undo/redo Lightroom edits if I already have the DNG? No. Each raw processing application is proprietary. Each application uses different ...
Michael C's user avatar
  • 175k
3 votes

Copy DNG/XMP metadata

With exiftool: exiftool -TagsFromFile srcimage.jpg targetimage.jpg But your big problem will be to create the correspondence between the old scans and the new. Or ...
xenoid's user avatar
  • 21.1k
3 votes

Are RAW files from iPhone different to ones from Android?

ProRAW is not ProRes. ProRes is a movie format. ProRAW is a stills format encapsulated in DNG - https://support.apple.com/en-gb/HT211965 - I can't find a full published spec from Apple, just consumer ...
Tetsujin's user avatar
  • 23.2k
2 votes
Accepted

DNG Compatibility in Adobe Lightroom

They are not "older". They are Version 1.4 as you can see. It is the latest DNG version as for now. "DNG Compatibility" means that these files will be readable by older software that can read DNG 1.3 (...
Zenit's user avatar
  • 1,791
2 votes

Why is Lightroom changing all the settings on my imported RAWs?

Lightroom shows you a JPG (the same one you see on your camera back) the first moment you import your photo. Then you see the Raw ones.
guillermo's user avatar
2 votes

How can I batch-compress DNG files in my Lightroom library?

The Lightroom Queen explains how to make Lightroom apply lossy or lossless DNG compression to raw files (including DNGs) that are in your photo library: Select the images. (This means LR can only do ...
Jerry101's user avatar
  • 153
2 votes

Why is Lightroom changing all the settings on my imported RAWs?

You should also check the "Apply auto tone adjustments" checkbox on the Presets tab of the Preferences dialog that may be in play here. If that is checked, I don't think you get the option to reset ...
Conor Boyd's user avatar
  • 2,584
2 votes
Accepted

How to strip iPhone DNGs of preview JPEGs?

So, good news and bad news. Good news is that you can replace the embedded JPEG with ExifTool (as shown in Can I embed existing JPEG's into DNG's as a preview?). Or, you can use ...
mattdm's user avatar
  • 143k
2 votes

What demosaic algorithm is best for DNG to B&W conversion?

I figure that at some point someone has devised a demosaic algorithm that is optimal for converting a Bayer DNG to a B&W photograph. Well "optimal" is in the eye of the beholder. Your idea of an ...
StephenG - Help Ukraine's user avatar
2 votes

RAW (.dng) on my Phone (OnePlus 5) vs on Picasa 3 (Noisy)

Any time you view a "raw" image on any device, one of two things is happenning: The raw data in the file is being processed and interpreted by the application you are using to view the image. That ...
Michael C's user avatar
  • 175k
2 votes
Accepted

Synology app reduces DNG file size

Use Synology's DS File app instead of DS Photo to backup photos from iPhone to (Synology) NAS. DS Photo does an unconditional and implicit conversion to jpeg. HEIC pictures are converted to jpeg. The ...
slingeraap's user avatar
1 vote

conversion from RAW to DNG (Adobe RAW) leads to unwanted crop

I took a look at your raw files. It seems there is extra data from the Sony sensor that is present in the ARW and DNG files but which is not designed to be part of the standard image size (6000x4000 ...
the_limey's user avatar
  • 538

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