Darktable

argazkiak

https://docs.darktable.org/usermanual/4.6/en/

Lehenengo erabiltzeko modulo basikoak:

1. denoise profiled
2. lens correction
3. rotate and perspective
4. orientation
5. retouch
6. crop
7. sharpen

Beste modulo interesanteak

1. white balance edo color calibration (azken hau hobeto)
2. exposure
3. tone equaliser
4. RGB curve
5. color balance RGB
6. sigmoid
7. filmic RGB
8. local contrast

Basikoa hasteko:
For the purposes of this guide, click on the hamburger icon (to the right of the tabs) and select the “workflow: scene-referred” preset now.
image processing in 3 modules
The following basic adjustments are fundamental to scene-referred editing and will be required, to some extent, on themajority of images. You can usually produce a good-looking image with these steps alone.
As you will be adjusting the tones and colors of the image, start by enabling color assessment mode (press Ctrl+B) andperform the following edits on the zoomed-out image while in this mode.
Set overall image brightness: First, set the overall (average) brightness of the image (the mid-gray point) byadjusting the exposure slider in the exposure module. This is a purely artistic setting and should be defined based onyour intent – for example, for a high-key image you will set the average brightness to be lighter than for a low-keyimage. The color assessment mode provides you with two reference points to assist with this by surrounding theimage with a white frame against a middle-gray background.
At this point, don’t worry if the brightest parts of your image lose detail – this can be recovered in the next step.

Note: The lens correction module can also affect the image brightness so you may want to consider enabling itbefore adjusting exposure.

Set white and black points: The next two steps use the filmic rgb module to define how the tones in your imagewill be mapped to the dynamic range of your display. Start by setting the white and black relative exposure sliders inthe scene tab . These are purely technical settings, defining white and black relative to the mid-gray point you set inthe previous step. If your image contains tones you want to treat as pure white or pure black you can use the colorpickers beside the sliders to set these values (using the maximum and minimum brightness of the image). Otherwiseset the values manually using the color assessment frames as a reference.
Adjust the contrast: Now move to the look tab in filmic rgb (for now we will skip the reconstruct tab ). Enable the look only view at the top of the module to see a representation of the filmic tone curve, which consists of a straightsection in the middle (used to set the contrast of the mid-tones) and curved sections at the top and bottom (wherethe shadows and highlights are compressed to fit the dynamic range of the display).
The contrast slider changes the slope of the straight section (the mid-tone image contrast), the latitude sliderchanges its length and the shadows/highlights balance slider changes its position. There is a lot of give-and-takeinvolved here – if you want to increase the contrast of the mid-tones, you must sacrifice contrast in the shadows/highlights and vice versa. The default settings of this module are tuned to work for the majority of images but youshould experiment with these sliders to understand how they affect the image.
Note: The highlight compression in the filmic rgb module can cause detail to be lost in the highlights. You canmitigate this to some extent by reducing the white relative exposure, adjusting the shadows/highlights balance orchanging the contrast in highlights setting in the
options tab . The tone equalizer module can also be used to reducethe relative brightness of the sky.

Color preservation: The tone mapping in the filmic rgb module attempts to redistribute the tones in your imagewithout affecting color reproduction. While the default color preservation algorithm works for most images, you areencouraged to experiment by changing the preserve chrominance setting in the options tab if you do not like how thecolors appear.

Saturation: Your image will probably not look very colorful at this point. You can adjust the global saturation of theimage using the color balance rgb module. The “basic colorfulness” preset should provide you with generally-reasonable defaults, but you are encouraged to experiment further with these settings as required.

Note: This guide assumes that the white balance of the image has been correctly captured by your camera. If this isnot the case, you may need to make some corrections in the color calibration module first.

You can now switch off color assessment mode by pressing Ctrl+B again.