Is it possible to sharpen (and otherwise edit) a TIFF file?

One of my systems is an Olympus E-M1 Mark III. I have a 12mm / f2 lens (35mm equivalent = 24mm) that I frequently use.

The straight-out-of-camera JPGs have very little barrel distortion, acceptable to me for a 12mm lens.

However, the RAW files are another story. They have a large amount of barrel distortion.

One of the reasons I purchased DXO was the ability to use one editor for all RAW file formats that I use: Canon, Olympus, Panasonic. But raw files from the Olympus w/12mm are quite a challenge.

I can open the Olympus RAW files using OM Workspace, and then export them as TIFFs. This applies distortion correction. Next, I can open the TIFF files using DXO and then sharpen (and otherwise edit) the file as if it were a RAW file.

So far this seems to work, and I probably don’t even need to ask this question. But I would like to ask the community at large, as a sanity check, if DXO can edit TIFF files as if they were camera RAW files?

Welcome to the forum @michaelbl

I consider PhotoLab to be a speciality tool for a selection of supported gear and formats. DxO’s FAQ deal with these things here: https://support.dxo.com/hc/en-us/sections/5860036247197-Supported-Cameras-Lenses-Formats

Using formats other than RAW is wasting a set of top features like demosaicing and denoising that work in tandem to provide what is considered by many to be the best results.

According to this page, your gear is supported (as far as I can gather from your info) for both JPEG and RAW formats. I’d therefore propose that you test the results with PhotoLab and PhotoLab and OM Workspace combined.

If you use 16bit/channel TIFF files and white balance them in OM-WS, you should be able to use most tools without sacrificing quality like you would when using JPEGs.

But again, I’d stick to a one shop workflow without format conversions and it’s quite okay to use PhotoLab as supporting app only. I use PhotoLab as add-on to Lightroom and I’d not use it in combination with Canon DPP…also because they were never intended to work together with the consequence of having to use 16bit TIFFs. Drive space is relatively cheap, but that doesn’t mean that I want to waste it.

No. PhotoLab cannot do the following to a TIFF:

  • apply its lens corrections
  • use any of its PRIME noise reduction algorithms
  • tweak both the colour temperature and tint

There my be other things it can’t do to a TIFF as well but those are the main ones.

That’s true for “bare” RGB TIFFs, but Lens Sharpness Optimization actually is available for TIFF images which contain suitable EXIF data and corresponding module is found. Just tried it with PL8 TIFF export from RAW.

EDIT: This may look to be in contradiction with DxO Wide Gamut: Consistency at every step - DxO , where LSO is done in camera native colorspace. The pipeline for TIFFs is a different thing, which wasn’t documented there.

PL is a raw converter. For its edits there’re a few tools that make use of the raw data. But all the other are based on the RGB values. What tools use the raw data is visible on the edit palette: they’re grayed out or named different like the wb.

George

Welcome @michaelbl

You say nothing about how you get started with PhotoLab.
Reading you, it seems you’re starting out “uncorrected”.
The quality of DxO corrections for Olympus is renowned.

Pascal

You just need to adjust the settings in DXO Photolab correctly. Your lens and camera are fully supported and DXO Photolab will apply the appropriate lens corrections and vary the sharpness across the frame, to match your lenses optical characteristics, as determined in DXO’s own optical labs.

This is one of DXO’s USP’s.

@Pascal

First, thanks for the response.

I do start out “uncorrected” in the sense that I have not previously been applying any presets. But I did find that in PL8 there exists a “3 - DxO Optical Corrections Only” preset. Applying this does seem to correct the barrel distortion mentioned previously, but I’ve not check very closely.

Is this what you were suggesting, to first apply a preset? Or were you thinking something else?

Mike

Mike
YES. That’s how DxO designed PhotoLab to work.

Pascal