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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
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 |