2D editor / Modes & colors

Indexed Colors
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Modes & colors
Keyboard access: I

This function converts image in 256 colors (or less) mode. Such conversion can be useful to reduce the image file size.

The view displays the conversion result depending on the followings options:

Exact palette, adaptative palette otherwise

Exact palette, no conversion otherwise

Adaptative palette

When image has less than 256 colors, it's possible to perfom an exact conversion. Resulting image is strictly the same as initial image. Created palette has the same color number than the image.
When the conversion can't be exact, the palette must be adaptative. Colors found are the one which give the better visual aspect.
If you want to have a particular number of color, select Adaptative palette. The resulting palette will have the exact number of colors you entered, even if an exact palette can be found for the image.
You'll find the number of colors of the initial image in the bottom of the dialog.

Bits per pixel

This menu allows you to select the bits number used for storing a pixel value. This modify the number of colors for the conversion.
Colors number is egal to 2^bits per pixel (ie. 2^3 bits = 8 colors).
Colors
Enter the number of color you want for the indexed image.
Bits per pixel is adjusted depending on the number you enter in this field.

No dithering

Dithering

Dithering simulates more colors than colors really displayed in the image.
Dithering increases virtual colors number but, reduces image definition. Small details of your image can be altered.

Note : when you choose a 2 colors conversion, resulting colors can't be different than black and white. To perform a black and white conversion, use "Monochrome" function.

Monochrome
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Modes & colors

This function converts image in 2 colors Black & white mode.

Image dithering Check Image dithering to simulate grays nuances on the resulting image.

Grayscale image
Version: for Dig. Cam. / for 3D Users
menu access: Edit / Modes & colors
Keyboard access: G

This function converts image in 256 grays levels mode. All color information is removed.