Package org.opencv.xphoto
Class GrayworldWB
- java.lang.Object
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- org.opencv.core.Algorithm
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- org.opencv.xphoto.WhiteBalancer
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- org.opencv.xphoto.GrayworldWB
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public class GrayworldWB extends WhiteBalancer
Gray-world white balance algorithm This algorithm scales the values of pixels based on a gray-world assumption which states that the average of all channels should result in a gray image. It adds a modification which thresholds pixels based on their saturation value and only uses pixels below the provided threshold in finding average pixel values. Saturation is calculated using the following for a 3-channel RGB image per pixel I and is in the range [0, 1]: \( \texttt{Saturation} [I] = \frac{\textrm{max}(R,G,B) - \textrm{min}(R,G,B) }{\textrm{max}(R,G,B)} \) A threshold of 1 means that all pixels are used to white-balance, while a threshold of 0 means no pixels are used. Lower thresholds are useful in white-balancing saturated images. Currently supports images of type REF: CV_8UC3 and REF: CV_16UC3.
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Constructor Summary
Constructors Modifier Constructor Description protected
GrayworldWB(long addr)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static GrayworldWB
__fromPtr__(long addr)
protected void
finalize()
float
getSaturationThreshold()
Maximum saturation for a pixel to be included in the gray-world assumption SEE: setSaturationThresholdvoid
setSaturationThreshold(float val)
getSaturationThreshold SEE: getSaturationThreshold-
Methods inherited from class org.opencv.xphoto.WhiteBalancer
balanceWhite
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Methods inherited from class org.opencv.core.Algorithm
clear, empty, getDefaultName, getNativeObjAddr, save
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Method Detail
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__fromPtr__
public static GrayworldWB __fromPtr__(long addr)
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getSaturationThreshold
public float getSaturationThreshold()
Maximum saturation for a pixel to be included in the gray-world assumption SEE: setSaturationThreshold- Returns:
- automatically generated
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setSaturationThreshold
public void setSaturationThreshold(float val)
getSaturationThreshold SEE: getSaturationThreshold- Parameters:
val
- automatically generated
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finalize
protected void finalize() throws java.lang.Throwable
- Overrides:
finalize
in classWhiteBalancer
- Throws:
java.lang.Throwable
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