CorelDRAW Help | Changing bitmaps to black-and-white images

Quick links to procedures on this page:

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

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.
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

1 .

Click a bitmap.

2 .

Click Bitmaps

Mode

Black-and-white (1-bit).

3 .

Choose an option from the Conversion method list box.

4 .

Move 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.

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