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BrightnessCorrection Class

Brightness adjusting in RGB color space.
Inheritance Hierarchy
SystemObject
  Accord.Imaging.FiltersBaseInPlacePartialFilter
    Accord.Imaging.FiltersBrightnessCorrection

Namespace:  Accord.Imaging.Filters
Assembly:  Accord.Imaging (in Accord.Imaging.dll) Version: 3.6.0
Syntax
public class BrightnessCorrection : BaseInPlacePartialFilter
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The BrightnessCorrection type exposes the following members.

Constructors
  NameDescription
Public methodBrightnessCorrection
Initializes a new instance of the BrightnessCorrection class.
Public methodBrightnessCorrection(Int32)
Initializes a new instance of the BrightnessCorrection class.
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Properties
  NameDescription
Public propertyAdjustValue
Brightness adjust value, [-255, 255].
Public propertyFormatTranslations
Format translations dictionary.
(Overrides BaseInPlacePartialFilterFormatTranslations.)
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Methods
  NameDescription
Public methodApply(Bitmap)
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.)
Public methodApply(BitmapData)
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.)
Public methodApply(UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlacePartialFilter.)
Public methodApply(UnmanagedImage, UnmanagedImage)
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(Bitmap)
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(BitmapData)
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(UnmanagedImage)
Apply filter to an unmanaged image.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(Bitmap, Rectangle)
Apply filter to an image or its part.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(BitmapData, Rectangle)
Apply filter to an image or its part.
(Inherited from BaseInPlacePartialFilter.)
Public methodApplyInPlace(UnmanagedImage, Rectangle)
Apply filter to an unmanaged image or its part.
(Inherited from BaseInPlacePartialFilter.)
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodProcessFilter
Process the filter on the specified image.
(Overrides BaseInPlacePartialFilterProcessFilter(UnmanagedImage, Rectangle).)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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Extension Methods
  NameDescription
Public Extension MethodHasMethod
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.)
Public Extension MethodIsEqual
Compares two objects for equality, performing an elementwise comparison if the elements are vectors or matrices.
(Defined by Matrix.)
Public Extension MethodToT
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
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Remarks

The filter operates in RGB color space and adjusts pixels' brightness by increasing every pixel's RGB values by the specified adjust value. The filter is based on LevelsLinear filter and simply sets all input ranges to (0, 255-AdjustValue) and all output range to (AdjustValue, 255) in the case if the adjust value is positive. If the adjust value is negative, then all input ranges are set to (-AdjustValue, 255 ) and all output ranges are set to ( 0, 255+AdjustValue).

See LevelsLinear documentation for more information about the base filter.

The filter accepts 8 bpp grayscale and 24/32 bpp color images for processing.

Sample usage:

// create filter
BrightnessCorrection filter = new BrightnessCorrection( -50 );
// apply the filter
filter.ApplyInPlace( image );

Initial image:

Result image:

See Also