Color
Threshold
Thresholds the image to white/black based on either the global values set in the value (low) and high properties, or per pixel from the aux input.
Operation pads
This operation exposes the following data pads, defining how it receives, processes, and emits image data:
Input
Aux
Output
Operation properties
Threshold
gdouble
Lowest value to be included.
Default
Value range
Default
0.50Value range
-200.00 • • 200.00.High
gdouble
Highest value to be include as white.
Default
Value range
Default
1.00Value range
-200.00 • • 200.00.Stretch Contrast HSV
Scales the components of the buffer to be in the 0.0-1.0 range. This improves images that make poor use of the available contrast (little contrast, very dark, or very bright images). This version differs from Contrast Autostretch in that it works in HSV space, and preserves hue.
Unpremultiply alpha
Unpremultiplies a buffer that contains pre-multiplied colors (but according to the babl format is not.).