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For the first time in its history, darktable breaks its one year release cycle by releasing version 3.2 in August of 2020. The unfortunate state of global health has led to a marked increase in contributions and improvements. On top of that, version 3.4 is still …

In other languages: Français, Italiano, Deutsch.

Following the tradition, darktable 3.0 has been released for Christmas. After many evolutions in 2018, 2019 has seen many very unexpected changes in darktable, both in its user interface and in its internal mechanisms. This makes darktable 3.0 a more than major …

The lut3d module will be introduced in darktable 3.0 and is designed to apply a 3D LUT (LookUp Table) to an image.

##3D LUT A 3D LUT is a tridimensional table which allows to transform any RGB value into another RGB value. The most common applications of LUTs are film simulation and color grading. But they can be …

In other languages: Français, Italiano.

Following the tradition, darktable 2.6 was released for Christmas. 2018 has been a year of renewal for darktable, with many major features introduced by recent contributors.

The announcement and release notes for this new release can be found here: …

A new year is coming on us quickly, so how about a nice new website to go with it?

houz and I have been working hard over the past few months to migrate the old website from Wordpress to a new static site, using Python/Pelican. This should make things more secure and …

improving contrast with the local laplacian filter

sometimes difficult lighting situations arise which, when taking photographs, result in unappealing pictures. for instance very uniform lighting on a cloudy day may give dull results, while very contrasty illumination (such as back lit) may require to compress the …

Rawsamples.ch is a website with the goal to:

…provide RAW-Files of nearly all available Digitalcameras mainly to software-developers. [sic]

It was created by Jakob Rohrbach and had been running since March 2007, having amassed over 360 raw files in that time from various manufacturers and cameras. …

Have you ever over-exposed your images? Have you ever noticed that your images look flat and dull after you apply negative exposure compensation? Even though the over/underexposed warning says there is no overexposure? Have you ever wondered what is going on? Read on.

the problem

First, why would you want to know …

modern sensor capture an astonishing dynamic range, namely some sony sensors or canon with magic lantern’s dual iso feature.

this is in a range where the image has to be processed carefully to display it in pleasing ways on a monitor, let alone the limited dynamic range of print media.

example images

use graduated …

[update 2016/07/31: there was a section about intermediate export to csv and manually changing that file. this is no longer needed, exporting the style directly from darktable-chart is fine now.]

motivation

for raw photography there exist great presets for nice colour rendition:

• in-camera colour processing such …