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Coreldraw 12 The Official Guide.pdf
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Color

Duotone (8-bit)

Paletted (8-bit)

 

 

RGB Color (24-bit)

Lab Color (24-bit)

 

 

CMYK Color (32-bit)

 

 

 

To change the color mode of a bitmap

1Click a bitmap.

2Click Bitmaps ` Mode, and click one of the following:

Black and White (1-bit)

Grayscale (8-bit)

Duotone (8-bit)

Paletted (8-bit)

RGB color (24-bit)

Lab color (24-bit)

CMYK color (32-bit)

The mode which the selected bitmap is in will not be available in the menu.

Changing bitmaps to black-and-white images

You can change any image to a black-and-white image. In addition to conversion settings such as threshold, screen type, and intensity, there are seven conversion options that affect how the converted images will look.

Conversion

Line art

Produces a high-contrast, black-and-white

 

image. Colors with a grayscale value lower

 

than the threshold value that you set change

 

to black, while colors with a grayscale value

 

higher than the threshold value change to

 

white.

 

 

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CorelDRAW Graphics Suite 12 User Guide

Conversion

Ordered

Organizes the gray levels into repeating

 

geometric patterns of black and white pixels.

 

Solid colors are emphasized and image edges

 

are hard. This option is best suited for

 

uniform colors.

 

 

Halftone

Creates different shades of gray by varying

 

the pattern of black and white pixels in an

 

image. You can choose the screen type, angle

 

for the halftone, lines per unit, and the unit

 

of measure.

 

 

Cardinality-Distribution

Creates a textured look by applying a

 

calculation and distributing the result to the

 

screen.

 

 

Jarvis

Applies the Jarvis algorithm to the screen.

 

This form of error diffusion is suitable for

 

photographic images.

 

 

Stucki

Applies the Stucki algorithm to the screen.

 

This form of error diffusion is suitable for

 

photographic images.

 

 

Floyd-Steinberg

Applies the Floyd-Steinberg algorithm to

 

the screen. This form of error diffusion is

 

suitable for photographic images.

 

 

To change a bitmap to a black-and-white image

1Click a bitmap.

2Click Bitmaps ` Mode ` Black-and-white (1-bit).

3Choose an option from the Conversion list box.

4Move the Intensity slider.

If you want to view different parts of the image, you can drag the image in the

Preview window.

The Intensity slider is not available for the Halftone conversion option.

CorelDRAW: Changing color modes in bitmaps

251

From here

For more information about

In the Help index, see...

 

 

Changing bitmaps to the paletted color

paletted color mode

mode

 

 

 

Changing bitmaps to duotones

duotone color mode

 

 

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CorelDRAW Graphics Suite 12 User Guide

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