You can use this to compare two live samples by locking just one of them, thus providing a before and after comparison. Further image changes will then no longer affect the sample. Clicking on a live sample’s color swatch locks it and a lock symbol is displayed.

This can be used to see how an altered parameter affects different parts of the image.

If you change your image processing those changes will be reflected in the live samples. Newly created live samples are not locked. You can change the numerical value (mean, min, max) and color space to display. A color swatch and numerical values will be shown for each stored sample. live samples The sampled colors (in either area or point mode) can be stored as live samples by pressing the “add” button. Beware that values in other color spaces are approximated here – depending on the display color profile there may be some deviations from the actual values. The global color picker works in display RGB color space, though you may choose (by selecting from the drop-down) to translate these numerical values into another color space. Clicking on the swatch will toggle on/off a much larger swatch for easier viewing. color swatch / color values A color swatch representing the sampled point or area is displayed alongside numerical values. For obvious statistical reasons mean, min and max are identical for the single sample of point mode. This combobox allows you to select which of those are displayed. mean/min/max If samples are taken in area mode, darktable will calculate mean, minimum and maximum color channel values. In area mode darktable samples the area within a drawn rectangle. In point mode only a small spot under your cursor is taken as a sample. 🔗module controls point/area mode The global color picker can be activated in point or area mode by clicking or Ctrl+clicking on the color picker icon, respectively (you can also right-click to enable area mode). If you are using a display color space which is not “well behaved” (this is common for a device profile), then colors that are outside of the gamut of the display profile will clip or distort. You can right-click on the sampled color values to copy them to the clipboard.Īs the global color picker runs at the end of the preview pixelpipe, it receives data in display color space then converts it to histogram color space. Local color pickers run in the color space of the module in which they are activated and reflect the input or output data of that module within the pixelpipe. The global color picker works in the histogram color space and takes its samples after the complete pixelpipe has been processed. You should be aware that these two forms of color picker do not always work in the same color space. tone curve) also contain local color pickers which are used to set individual module parameters. The module’s parameters will remain in effect until you leave the darkroom mode.īesides the global color picker described here, many darktable modules (e.g. The color picker is activated by pressing the color picker icon.

Take color samples from the current darkroom image, display their values in multiple ways and compare colors from different locations.

Color picker table wheel