CorelDRAW:color modes of bitmaps

Modifying a picture into other color modes, like CMYK, Grayscale, or RGB, modifies the color structure of a bitmap.

This chapter includes the following essential topics:

Modifying the bitmap color modes
Converting bitmaps into black-and-white pictures
Changing bitmaps into duotones
Changing bitmaps into paletted color mode

Modifying the bitmap color modes

The image color that we wish to work in CorelDRAW is based on some color modes. The color modes specify the image characteristics and can be defined by its component colors. RGB color mode consists of green, blue, and red values; CMYK color mode is consists of magenta, cyan, black, and yellow values.

CorelDRAW supports some of the below-mentioned color modes:

CMYK color (32 bit)
Lab color (24 bit)
RGB color (24 bit)
Paletted (8 bit)
Grayscale (8 bit)
Duotone (8 bit)
Black and white (1 bit)

To modify the bitmap color mode

1. Select the bitmap.

2. Press Bitmaps > Mode, and press any color mode.

Converting bitmaps into black-and-white pictures

We can convert a picture into black-and-white pictures.

To convert any bitmap into a black-and-white picture

1. Select the bitmap.

2. Press Bitmaps > Mode > Black-and-White (1-bit).

3. Select any option from the list box of the Conversion method.

4. Move the slider, i.e., Intensity.

Note: If we wish to view distinct parts of a picture, we can drag a picture inside the Preview window.
The slider, i.e., Intensity is not present for a conversion option, i.e., Halftone.

Changing bitmaps into duotones

To change a picture into a duotone, we can modify the bitmap into the grayscale color mode and also enhance it with one or four colors, providing a picture higher tonal depth.

The color modes have four variations correspond to an additional ink's number which is listed below:

Monotone: The grayscale picture is colored with an individual tone.
Duotone: The grayscale picture is colored with any two tones. One will be colored and other will be black in most of the cases.
Tritone: The grayscale picture is colored with any three tones. The two will be colored and the third will be black in most of the cases.
Quadtone: The grayscale picture is colored with any four tones. The three will be colored and the fourth will be black in most of the cases.

To convert a picture into the duotone

1. Choose the bitmap.

2. Press Bitmaps > Mode > Duotone (8-bit).

3. Select the Curves

4. Select the list of Type from the duotone type.

5. Double-click the ink color from the Type

6. Select any color, and press OK from the Select color dialog box.

7. Repeat steps 6 and 5 for all the ink colors we wish to use.

Changing bitmaps into paletted color mode

A paletted color mode is known as indexed color mode, which is sometimes applied for pictures over the WWW (World Wide Web). If we transform any image into paletted color mode then a color value (fixed) will be assigned to all the pixels. The values are saved in the palette or compact color table, including up to 256 colors.

If we convert any image into the paletted color mode, we can use any predefined palette, or we can customize the color palette by substituting individual colors.