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AVL.ColorDistanceImage Method
Compares each pixel with the specified color using chromatic and non-chromatic information.
Namespace: | AvlNet |
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Assembly: | AVL.NET.dll |
Syntax
public static void ColorDistanceImage( AvlNet.Image inImage, AvlNet.Pixel inRgbColor, float inChromaAmount, out AvlNet.Image outValueImage )
Parameters
Name | Type | Range | Default | Description | |
---|---|---|---|---|---|
![]() | inImage | AvlNet.Image | Unsigned color image used in comparison. | ||
![]() | inRgbColor | AvlNet.Pixel | Color to compare the image to. | ||
![]() | inChromaAmount | float | <0.0f, 1.0f> | 0.7f | Proportion of chromatic information in distance computation. Default value: 0.7f. |
![]() | outValueImage | AvlNet.Image | Unsigned image of distances. |
Description
The operation computes the distance between each pixel of inImage and a specified color, presenting result as a monochromatic image. Input image should be in RGB color space.
Distance between pixels is computed using two measures:
- Value distance - difference between pixel average values.
- Chromatic distance - euclidean distance between pixel colors interpreted as points in N-dimensional space ( where N denotes the number of pixel channels ) rescaled to the (0.0 - 255.0) range.
The resulting distance is computed as a weighted average of these two values, parameter inChromaAmount ( 0.0 - 1.0 ) being the weight of the chromatic distance, and 1 - inChromaAmount being the weight of the value distance.
Examples
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ColorDistanceImage run with inRgbColor = , inChromaAmount = 0.8
Hardware Acceleration
This operation supports automatic parallelization for multicore and multiprocessor systems.
Hardware acceleration settings may be manipulated with Settings class.
Errors
Error type | Description |
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RuntimeError | Each pixel component of inRgbColor must be nonnegative in ColorDistanceImage |