You can only preview noise reduction in RT when you zoom image to 100%, even in latest version.
Many other tools have same limitations for previewing, they are marked with small "1:1" label near their names.
AfterShotPro 1.0.1 = ASP, Lightroom = LR 4.1 (sorry I don't have personal experience with DarkTable)
Speed: ASP way faster. LR - sloooow (on Core i5 3550, 16GB RAM, Win7)
Importing: ASP no need to import to do enough tasks with files. LR - mandatory
Multi catalog searching: ASP only
Non-distructive editing: both.
Split Toning: LR only
Local editing: The ...
Apologies in advance for my English - if someone wonders about my writing style, please keep in mind, my native language is German.
I can tell a few things about ASP and Darktable on openSuSE and LR on Windows 7.
ASP = Corel Aftershot 1.0.1 (Linux)
LR = Lightroom 4 (Windows)
DT = Darktable 1.2.1 (Linux, packaged for openSuSE)
There was temporarily a ...
I just discovered a way to do this. I'm using RawTherapee 4.2, but from your screenshot, I think this feature is in the version you used, too. It's in the toolbar just to the top right of the image. From my system:
The blue, green, red, and gray squares let you preview individual color or luminosity channels — they're toggles you can click on. To the left ...
From the RAWTheraPee 3.0 Documentation:
If you have saved the above output file next to your raw, you might notice that there's a third file
called DSC_1000.jpg.pp3. This is a little text file that describes exactly what edits you made to your
photo. Just open it in an editor to see how it looks like. Whenever you re-open that raw in
Very good question :0)
When you expose your image you have more detail than you can normally see on a normal monitor. This is more a limitation of the display technology than the raw sensor.
This technology is limited to the 256 levels of gray for each channel, but your sensor captures more levels on each channel, this means you have more color diferences ...
Always trust the histogram. Unless you diligently adjust the rear LCD brightness every time the ambient lighting changes significantly, you cannot really rely on that. It does sound like you have the LCD set too bright. Check the "LCD Brightness" entry in the "Setup 2" menu.
It looks like rawtherapee is showing you the RAW image with a very flat base curve
When a program displays a RAW image, it must map the full range of pixel values storable in the 16-bit raw to the lower bit levels (typically 8-bit) which can be handled by your computer and screen. It doesn't necessarily do this with a linear transformation, it will apply a "...
There aren't any built in that I'm aware of, but you can just define your own (in Darktable it would be a "style"). I have a base style I start with that adjusts the base curve, increases the saturation slightly, applies profiled denoising (a newer feature which is fantastic), lens correction, etc.
A quick Googling for "Darktable styles" brought up the ...
Entangle shows the histogram of the JPEG image embedded in the RAW file, in logarithmic scale. RawTherapee, on the other hand,
shows the histogram in linear scale,
shows the histogram of its pre-processed form of the RAW file, not of the embedded image.
This explains the difference.
To see histogram of raw data just enable the Show/Hide raw histogram ...
The noise is present in the original file.
What you have done with your choice of settings is amplified it. Noise is mostly present in dark areas but you have basically applied gain to those areas and hence to noise noise.
All channels have noise but the blue and red channels have more noise since they are formed using fewer photosites. In your processing, ...
Switch to the File Browser view and find your image. Right click on the little green check mark and select "Processing profile options" followed by "Clear". That will reset the sidecar file to the unedited / default state.
For partial reverts, in the History pane on the left, click on the step you're interested in keeping - the ones after (below) that will ...
That is the result of the raw processing program not having the correct profile for the said camera. Getting an updated version should resolve your problem. The list of cameras supported by RawTherapee, together with the version number since, can be found at RawPedia.
I have been using Lightroom for a couple of years (both version 3 and 4) and it has some nice features and some quirks.
Importing, I can set the categories for all the photos I want to import, and have it "pre-touch up" my photos. This saves a lot of time later.
Non-destructive editing, I can always revert back to the original picture.
The auto correct ...
I have been using Darktable and Aftershot. I cannot comment on Lightroom since it doesn't run in my Operating System.
I prefer Darktable, it has lot of plugins and features and allows for a quality of pictures.
PS: You could also check photivo: it is a good solution, too.
Noise reduction is very computationally expensive process. When you zoomed in it only processes a small part of the image, but when you zoomed out the algorithm would have to process the whole file and then re-scale it, which takes a great deal of time even on modern hardware.
Found it here in the RawTherapee documentation:
In Colour Management, you can select an output and/or working colour space. Most likely, you selected one ending in _g10, which denotes a colour space with linear gamma.
RawTherapee's main histogram and clipping indicators will also be based on the output profile.
Ordinary sRGB has a gamma of 2.4 (...
Many previews in image editing applications are just that - previews. To get an exact view of what many effects and settings applied to an image will look like you should export the image with the changes applied. Since this can be rather tedious and cumbersome, previews allow us to see an approximation. Many noise reduction tools, including RawTherapee, ...
RawTherapee, and other raw processors, usually create sidecar files containing the edits you've made. If you delete the sidecar file while RawTherapee is closed, the next time you open the image, RawTherapee will start with the default profile. If I recall correctly, the sidecar file is named the same as the image with the extension pp3. If you have multiple ...
If I view an image in Shotwell, and choose "Open in RAW Editor", make an edit, then go back to Shotwell, how do I get Shotwell to then show the edited image?
You probably can't. The RAW editors like RawTherapee are non-destructive editors. You don't edit the RAW image; instead, you apply a series of instructions to the RAW image, and the instructions are ...
Well, for the example screenshots that you posted, the RawTherapee "exposure" controls consist of a number of things which darktable dedicates several distinct modules to.
The "exposure" slider in darktable would be equivalent to the "exposure compensation" slider in RawTherapee, both giving values in EV. I'm guessing the "black" controls are equivalent as ...
I have tried both programs but have more experience with RAWTherapee as I've only recently become aware of Darktable. If you're main aim is to find something that helps you work with RAW files as a relative beginner I would suggest Darktable, primarily because the GUI is just more user friendly. One slight snag I found in RAWTherapee was expanded windows ...
I'm doing it my way in GIMP - I take "Free select tool", select the part I want to modify. Then I feather the edges of the selection by 30-100px depending on the size of selection (most often I go for 50px), then I copy the feathered selection and past it as a new layer. This way I can do any adjustments to this particular bit and the rest of the image will ...
On Windows, they can be found at:
X:\Program Files\Adobe\Adobe Lightroom\Resources\LensProfiles\
On Mac, they should be here:
Applications/Adobe Photoshop Lightroom X/Right-click Show Package Contents/Resources/Lens Profiles
Julieanne Kost: Where does Lightroom Install Camera and Lens Profiles?
As far as I know, there is currently no way to translate PP3 to XMP sidecars, or vice versa.
And developers are often reluctant to adapt their program to read data written by another program, especially for formats like .PP3, which can change without warning between program versions*.
Even exchanging XMP files from different programs isn't all that evident....
You can do this in Darktable using the 'Zone System' plugin, shown below. I'm making the assumption that the part of your image you want to modify would be automatically selected by the plugin for adjustment (shown in yellow highlighting in my screenshot).
From the manual:
If you have saved the above output file next to your raw, you might
notice that there's a third file called DSC_1000.jpg.pp3. This is a
little text file that describes exactly what edits you made to your