Effects > Artistic > Threshold Lines
Threshold Lines
The Threshold Lines filter allows you to draw image lines using two colors.
1. Choose Effects > Artistic > Threshold Lines
2. Use the following options:
Threshold = 64Threshold = 128Threshold = 192
Use this option 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.
 Size (px)
Length = 8Length = 4
This option allows you to change the length of a line segment. The length of a line segment is the distance between two points of a polygon. The larger the distance the lower the complexity of the polygon. If the distance is too large, the image will become disordered.

Min = 1, Max = 50, Default = 5.
 Line Width (px)
Use this option to set the line width in pixels.

Min = 1, Max = 50, Default = 3.
 Vectorize Image
Vector imageRaster image
This option allows you to vectorize the image. Vectorization is the conversion of raster graphics (pixels) into vector graphics such as points, lines, curves, and polygons. The original raster image is converted into vectorized polygons.
Use this option to draw a smooth line through the corner points of a polygon. When this option is unselected, the corner points of the polygon are connected by straight lines.
 Foreground Color
Use this option to change the foreground color.
 Background Color
Use this option to change the background color.
OK + Export as Layers
Use this option to apply the effect and create multiple layers, each of which can be manipulated without affecting any other part of the image.
Related Information
Effects > Two Colors > Threshold
Effects > Design > Lines
Pop Art > Panels > Threshold
Tools > Shapes > Grid Lines
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