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darktable 3.0

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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 …

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A new module: lut3d

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 …

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a new website

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

Babynew
Baby New Year from 110 years ago …

houz and I have been working hard over the past few months to migrate the old website from Wordpress to a new static site …

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local laplacian pyramids

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 contrast to embrace both …

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rawsamples.ch replacement

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. Unfortunately, back …

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Visualizing the raw (sensor) highlight clipping

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 …

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colour manipulation with the colour checker lut module

[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 as canon …

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Liquify, liquify?

Most modules in darktable are working on changing pixels color, lightness, etc. Few modules are moving pixels and when they do they are doing it in a very constraint way like to rotate, fix the lens’ distortions or remove spots.

The liquify module offer more ways to move pixels around …

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