Effects > Two Colors > Threshold
Threshold
The Threshold filter allows you to decrease the image's color depth to 2 colors using the Threshold reduction method.
1. Do one of the following:
 Choose Effects > Two Colors > Threshold
 Click the Threshold button on the toolbar
2. Use the following options:
 Threshold
            
Threshold = 64Threshold = 128Threshold = 192
This option allows you to change the threshold value. Pixels whose grayscale value is less than or equal to a certain threshold are set to the foreground color (or primary color). Pixels whose grayscale value is bigger than a certain threshold are set to background color (or secondary color).

Min = 0, Max = 255, Default = 128.
 Transparent
Use this option to make the background color transparent.
 Antialias
    
Without antialiasWith antialias
This option allows you to draw smooth flowing lines by shading the pixels along the borders of graphical elements.
 Reduce Noise
Reduces image noise. Image noise appears as random extraneous pixels that aren’t part of the image detail.
 Invert
Use this option to swap the foreground and background color.
 Foreground Color
This option allows you to change the foreground color.
 Background Color
Use this option to change the background color.
 Channel
This option allows you to select a specific color channel or grayscale values. The threshold filter will be applied to the selected channel.
Using Preview Windows
Favorites and History
Related Information
Effects > Artistic > Threshold Lines
Pop Art > Panels > Threshold
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