25
votes
Level adjusting images to hide internal features/detailing
A well know technique is called "luminosity masks". You create a selection mask where the pixels selection level is:
100% or near 100% in the luminosity range that you want to change,
0% or very low ...
- 20.6k
24
votes
Accepted
What type of postprocessing gives the effect of people standing out against a flat-seeming background?
I'd guess it's as simple as selecting the subject in Photoshop - with a tad more care & attention than I've used below, then leeching out the saturation in the background & tonally balancing ...
- 23.1k
20
votes
Is a JPG guaranteed to produce the same pixels?
Short Answer
No, decoding is not guaranteed to always be the same. However, the differences are guaranteed to be very, very small.
ISO Specifications
The International Organization for ...
- 301
14
votes
Can the Nik Collection be used without Photoshop or Lightroom?
Yes they can, but there are some significant caveats. Although they can be run alone, the plugins were not designed to be used as a standalone application.
If you have the folder with the executable ...
- 175k
14
votes
Accepted
Can a blind person resize a photo independently?
The image I uploaded was rejected because it was under 300 DPI.
The DPI is just a number which has no relevance to a digital image. It relates only to printing and not the quality or resolution of ...
- 6,385
11
votes
How can I extract just the value of a tag without the name using exiftool?
Use -b:
$ exiftool -b -make x.jpg
From the man page:
-b (-binary)
Output requested metadata in binary format without ...
- 403
11
votes
Accepted
Why I am getting only solid yellow images from Adobe Camera Raw?
The display corruption could be a consequence of using GPU acceleration in the ACR module. Not all cards are supported, so try toggling off the option.
Also make sure that option is off in Photoshop.
- 33k
11
votes
Is there software other than Lightroom that offers local Laplacian filters? (Or similar.)
This processing is implemented in darktable via the Local contrast module as explained here. The interface probably isn't as sophisticated as you might like, but may be an improvement on software that ...
- 5,404
10
votes
Accepted
Remove lightroom from second monitor
The Dual Monitor mode is activated by the Second Window button.
To close the second window just click this button again.
More on Adobe help page.
- 1,791
10
votes
Accepted
Level adjusting images to hide internal features/detailing
I'll interpret your question in the opposite way everyone else has. You seem to me to be asking how to prevent the details becoming visible again. Once you have darkened your image, increase the black ...
- 216
9
votes
How to migrate from Picasa to Lightroom?
I wrote a Lightroom plugin for migrating from Picasa to Lightroom. I searched all over the web and could not find a good solution, so I wrote one myself. I decided to polish it up and offer it for ...
- 91
9
votes
Is a JPG guaranteed to produce the same pixels?
No, you can't depend on decoded JPEG images being bit-for-bit identical.
As an example, I tried viewing the image at the top of this page in two different browsers: Chrome 53.0.2785.143 and Internet ...
- 1,495
9
votes
Accepted
Opening NEF files on windows initially open fine but then change contrast
Anytime you open a raw file and look at it on your screen, you are not viewing "THE raw file." ¹ You are viewing one among a near-countless number of possible interpretations of the data in ...
- 175k
8
votes
How to migrate from Picasa to Lightroom?
Non-destructive Edit History
The bad news is that the non-destructive edit history is not something that can easily be moved between Picasa and any other photo processor. Sorry, you just won't be ...
- 46.5k
8
votes
If EXIF metadata is removed, can I find the software or camera used in any other way?
JPEGsnoop compares the compression signature in a JPEG with its database of known combinations of signatures and software/firmware, and gives a list of software/cameras that match the signature of the ...
- 11.7k
8
votes
Are there image stacking (astrophotography) options on MacOS that don't involve running a Windows VM?
There are possibly several options available. From a cursory search, native Mac applications include:
Nebulosity
Keith's Image Stacker
PixInsight (cross-platform)
Starry Landscape Stacker
If none of ...
- 32.3k
8
votes
Terminology for camera focus values
Photographers don't care about the 0 to 255 values, they care about the actual focal distance of the lens in real world units (i.e. metres in the vast majority of cases). If you are creating a product ...
- 21.8k
7
votes
Accepted
How to copy a drawn mask in Darktable?
In the darkroom, go to the left panel
At the bottom of the panel, you have a masks management module
In the module, you have a list of modules using masks and then a list of masks
On the relevant mask,...
- 827
7
votes
How to automate a camera to take two pictures every hour for 24 hours, with each picture spaced apart by 15 seconds?
Easy. Use any Canon camera supported by magic lantern. Load it onto the card (plenty of tutorials online, all you have to do is copy some files onto the SD card and run a firmware update on the camera)...
- 881
6
votes
Is there photo analysis software which will pre-sort images by identifying potential technical problems?
This is pretty easy to do if you can write in Python. Here's a good article on using an open-source computer vision package to detect overall picture blurriness:
https://www.pyimagesearch.com/2015/...
- 61
6
votes
Accepted
Is there any information on Fuji X Wifi protocol?
I was searching for something similar and found this GitHub repository, which was someone's attempt to reverse engineer the wi-fi protocol with the Fujifilm X-T10.
- 216
6
votes
How to migrate from Picasa to Lightroom?
I have migrated from Picasa to Lightroom (4 at that time) about 3 years ago, and have made the following experiences:
If you just add the Picasa folder structure to your Lightroom Catalog without ...
- 1,488
6
votes
Why does editing software not care about colorspace?
Most editing software cares very much about colorspace. The issue is that users don't usually understand it (because it's very complicated), and even when they do, they often expect contradictory ...
- 2,893
6
votes
Accepted
Why are files auto-converted to JPEG when transfer from Nikon D7200 to a PC?
The WMU app seems oriented around sharing photos, for which RAW isn't an appropriate option.
Page 20 of the manual says "NEF (RAW) images are converted to JPEG format"
Additionally: "if the images ...
- 33.3k
6
votes
Accepted
GraphicConverter 10.x - what is "image verification"? What does it do?
This is described by the manufacturer:
Specifically added due to requests from users, this new feature is a background task that can regularly verify images on NAS devices.
I expect that what it ...
- 143k
5
votes
What software can show my most frequently used focal length?
The latest version of ExifToolGUI supports graphing and recursive search !
http://u88.n24.queensu.ca/exiftool/forum/index.php/topic,2750.0.html
http://u88.n24.queensu.ca/~bogdan/
https://sno.phy....
- 151
5
votes
How can I browse photos with a temporary grayscale filter?
You didn't specify an operating system, but for Linux and friends, geeqie can toggle between normal and grayscale display at a keystroke (Shift+G by default).
- 5,404
5
votes
Accepted
In darktable, how can I get a particular basecurve preset to be applied automatically?
In the current version of darktable (2.2.1) you can open settings > "core options" and select "auto-apply per camera basecurve presets". In previous versions, you can just create a preset using that ...
- 5,404
Only top scored, non community-wiki answers of a minimum length are eligible