Enhance Raw File Details in Lightroom Classic CC and Lightroom CC

Issues Reported After Release

Adobe is working on the following reported issues, which affect a subset of Lightroom users. Click through on the links for updates.

In addition, some Windows 10 users have found that the Windows Auto Update process does not update them to the required v. 1809 (see below) and that they therefore get the Enhanced Details message that they are not on 1809. Run a manual update if needed.

If you experience another issue, look for a report of the issue here (or report it yourself).

System Requirements for Enhanced Details

This process takes advantage of recent operating system machine-learning platform developments, so it is only available for:

  • Mac OS 10.13 and later (High Sierra, Mojave, any later versions)
  • Windows 10 October 2018 release (1809) and later. (That it is not supported on Windows 7 is a technical constraint, not a policy decision by Adobe. Enhanced Details relies on the machine learning platform WinML, which was just released in Windows 10 1809.)

It is very processor-intensive. It heavily uses the available GPU and can use an external eGPU if available. Depending on your system and raw file size, processing one file could take from 15 seconds to well over a minute.

How to Run Enhance Details

  • Select one or more supported raw files, right-click in one and choose Enhanced Details. If you selected one image, you’ll see a preview window; if more than one, they will start processing immediately.

Unsupported files: Non-raw files such as a JPEGs, TIFFs, and HEICs; Linear DNGs (including HDR and pano DNGs created by Merge – run E.D. on source files before merging); DNG proxies (Smart Previews); Lossy, compressed DNGs; DNGs saved with ACR 1.1 compatibility; Monochrome raw files (such as Leica M MONOCHROM); Four-color cameras (such as Sony F828);  Foveon cameras; Fujifilm cameras with SR, EXR, or 2×4 mosaic sensors; Canon S-RAW/M-RAW files; Nikon small raw files;  Pentax Pixel Shift Resolution (PSR) files; Sony ARQ files; Video files

Lightroom Enhanced Details Preview

  • The preview window is zoomed to 4:1. Click and hold in the image to see before, let go to see after. To move to a different area of the image, either click and drag or click on the magnifier (#1 in the screenshot above) to zoom out, and then click elsewhere to zoom in.
  • An estimate of processing time is provided (#2) based on your system specs – but this is just an estimate.
  • The process does not overwrite your original raw file; it creates a new DNG file (a linear, demosaiced raw file), with the file name “source-file-name – Enhanced.dng”. This will be stacked with the original.

The Costs of Running Enhanced Details

Not only is the time to run Enhanced Details significant, but from what I have seen with my tests, the resulting Enhanced DNG files will be 2-5 times larger than the original raw files. One reason for the larger file size is that the original raw data is included in the Enhanced file along with the demosaiced linear data, so that Enhanced Details can be rerun on the file if there are future improvements to the algorithm.

Circumstances More Likely to Display Improvements

If you go looking for improvements with E.D., you’ll almost certainly find many more images that don’t show improvements than ones that do. Here’s some guidance on what to look for:

  • Images or areas with lots of very fine detail – detail that is pixel-sized (or a handful of pixels)
  • Edges between strong colors, particularly blue and yellow (or orange or red); small colorful details
  • Fine diagonal lines, diagonal edges
  • Images with noticeable artifacts or moire
  • Man-made edges – buildings, text on signs (appearing very small in the image)
  • Images taken with older cameras without low pass filters
  • Smaller files or small crops from large files – this increases the likelihood that details will be pixel-sized
  • Enlarged files – enlarging will make issues more obvious

When to Run Enhanced Details

I would suggest that given the costs and benefits, that you consider running Enhanced Details when you’re making or ordering prints (including in photo books). If you would label your prints “fine art” rather than “snapshots”, then I’d go ahead and run it – you shouldn’t see any harm created by this process, and you’ll ensure that your print is as high quality as possible. (I was going to suggest when you make large prints – but that gets too complicated, as it depends how large your original file or crop is, how large your output is, whether your image is a Fuji image or has particular characteristics, etc. – so instead, I’ve landed on, “Why not?” However, you’ll get the most bang for your buck with large prints (and full-page photo book images).   Keep in mind that after you create your output, if you don’t plan to create more, you can delete the Enhanced file – you can always create it again.

That said,

  • Some of you are very tuned in to fine-detail quality and will want it for all your files regardless of your plans for them – do cull first and buy extra hard drives.
  • Others of you are just learning the basics of Lightroom and these improvements are too small and esoteric to contemplate at this point (and you most likely didn’t get this far in this article.) You won’t run it at all – and that’s perfectly fine!

Demosaicing: Why It’s So Difficult to Produce Perfect Fine Detail

Our digital images are made up of pixels – if you zoom way in on an image you’ll see these square of color. Images as we know them – as we see them in Lightroom and as we share them with the world- have red, green and blue color values for each pixel – with these three numbers any color (and brightness level) can be represented.  Oddly enough though, our camera sensors only capture one color per pixel – red, green, OR blue, and that value is what is stored in the raw data – this is known as mosaic data. The image below shows one tiny section (an array) of a multi-million-pixel sensor:

Lightroom Demosaicing from Mosaic Sensor Data

For each pixel then, Lightroom has to interpolate (guess!) the other two color values from the values of surrounding pixels – this is known as demosaicing.  Because this is an educated guess, pixels sometimes are given incorrect values. This produces artifacts (odd differences in pixel values when they should be the same), false colors, blurry or jagged edges, and moire. Enhanced Details is a much more sophisticated mathematical algorithm that produces fewer errors, but requires much more processing power and time than Lightroom’s default one. Soon I’ll link here to Adobe’s articles on this.

Notice in the sensor array depictions above that twice as much green information is collected than blue and red. Because there is less blue and red data, demosaicing algorithms will throw more errors/issues with these colors (and closely related colors, like yellow and orange). A blue-red or blue-yellow edge is even more challenging. Enhanced Details does notably better with these challenges – evidenced by the yellow leaves against blue sky image I presented at the top of this article.

Source link