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HorizontalRunLengthSmoothing Class |
Horizontal run length smoothing algorithm.
Inheritance HierarchySystemObject
Accord.Imaging.FiltersBaseInPlacePartialFilter
Accord.Imaging.FiltersHorizontalRunLengthSmoothing
Accord.Imaging.FiltersBaseInPlacePartialFilter
Accord.Imaging.FiltersHorizontalRunLengthSmoothing
Namespace: Accord.Imaging.Filters
Assembly: Accord.Imaging (in Accord.Imaging.dll) Version: 3.8.0
SyntaxThe HorizontalRunLengthSmoothing type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | HorizontalRunLengthSmoothing |
Initializes a new instance of the HorizontalRunLengthSmoothing class.
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| HorizontalRunLengthSmoothing(Int32) |
Initializes a new instance of the HorizontalRunLengthSmoothing class.
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Properties| Name | Description | |
|---|---|---|
 | FormatTranslations |
Format translations dictionary.
(Overrides BaseInPlacePartialFilterFormatTranslations.) |
| MaxGapSize |
Maximum gap size to fill (in pixels).
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| ProcessGapsWithImageBorders |
Process gaps between objects and image borders or not.
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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 class implements horizontal run length smoothing algorithm, which is described in: K.Y. Wong, R.G. Casey and F.M. Wahl, "Document analysis system," IBM J. Res. Devel., Vol. 26, NO. 6,111). 647-656, 1982.
Unlike the original description of this algorithm, this implementation must be applied to inverted binary images containing document, i.e. white text on black background. So this implementation fills horizontal black gaps between white pixels.
 Note |
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| This algorithm is usually used together with VerticalRunLengthSmoothing, Intersect and then further analysis of white blobs. |
The filter accepts 8 bpp grayscale images, which are supposed to be binary inverted documents.
Sample usage:
// create filter HorizontalRunLengthSmoothing hrls = new HorizontalRunLengthSmoothing( 32 ); // apply the filter hrls.ApplyInPlace( image );
Source image:
Result image:
See Also