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ContrastCorrection Class |
Inheritance HierarchyAccord.Imaging.FiltersBaseInPlacePartialFilter
Accord.Imaging.FiltersContrastCorrection
Namespace: Accord.Imaging.Filters
Assembly: Accord.Imaging (in Accord.Imaging.dll) Version: 3.8.0
SyntaxThe ContrastCorrection type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | ContrastCorrection |
Initializes a new instance of the ContrastCorrection class.
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| ContrastCorrection(Int32) |
Initializes a new instance of the ContrastCorrection class.
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Properties| Name | Description | |
|---|---|---|
 | Factor |
Contrast adjusting factor, [-127, 127].
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| FormatTranslations |
Format translations dictionary.
(Overrides BaseInPlacePartialFilterFormatTranslations.) |
Methods| Name | Description | |
|---|---|---|
| Apply(Bitmap) |
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.) |
| Apply(BitmapData) |
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.) |
| Apply(UnmanagedImage) |
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlacePartialFilter.) |
| Apply(UnmanagedImage, UnmanagedImage) |
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(Bitmap) |
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(BitmapData) |
Apply filter to an image.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(UnmanagedImage) |
Apply filter to an unmanaged image.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(Bitmap, Rectangle) |
Apply filter to an image or its part.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(BitmapData, Rectangle) |
Apply filter to an image or its part.
(Inherited from BaseInPlacePartialFilter.) |
| ApplyInPlace(UnmanagedImage, Rectangle) |
Apply filter to an unmanaged image or its part.
(Inherited from BaseInPlacePartialFilter.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ProcessFilter |
Process the filter on the specified image.
(Overrides BaseInPlacePartialFilterProcessFilter(UnmanagedImage, Rectangle).) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Extension Methods| Name | Description | |
|---|---|---|
 | HasMethod |
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.) |
| IsEqual |
Compares two objects for equality, performing an elementwise
comparison if the elements are vectors or matrices.
(Defined by Matrix.) |
| To(Type) | Overloaded.
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.) |
| ToT | Overloaded.
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.) |
RemarksThe filter operates in RGB color space and adjusts pixels' contrast value by increasing RGB values of bright pixel and decreasing RGB values of dark pixels (or vise versa if contrast needs to be decreased). The filter is based on LevelsLinear filter and simply sets all input ranges to (Factor, 255-Factor) and all output range to (0, 255) in the case if the factor value is positive. If the factor value is negative, then all input ranges are set to (0, 255 ) and all output ranges are set to (-Factor, 255_Factor).
See LevelsLinear documentation forr more information about the base filter.
The filter accepts 8 bpp grayscale and 24/32 bpp color images for processing.
Sample usage:
// create filter ContrastCorrection filter = new ContrastCorrection( 15 ); // apply the filter filter.ApplyInPlace( image );
Initial image:
Result image:
See Also