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Difference Class |
Difference filter - get the difference between overlay and source images.
Inheritance HierarchySystemObject
Accord.Imaging.FiltersBaseInPlaceFilter
Accord.Imaging.FiltersBaseInPlaceFilter2
Accord.Imaging.FiltersDifference
Accord.Imaging.FiltersBaseInPlaceFilter
Accord.Imaging.FiltersBaseInPlaceFilter2
Accord.Imaging.FiltersDifference
Namespace: Accord.Imaging.Filters
Assembly: Accord.Imaging (in Accord.Imaging.dll) Version: 3.8.0
SyntaxThe Difference type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | Difference |
Initializes a new instance of the Difference class.
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| Difference(Bitmap) |
Initializes a new instance of the Difference class.
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| Difference(UnmanagedImage) |
Initializes a new instance of the Difference class.
|
Properties| Name | Description | |
|---|---|---|
 | FormatTranslations |
Format translations dictionary.
(Overrides BaseInPlaceFilterFormatTranslations.) |
| OverlayImage |
Overlay image.
(Inherited from BaseInPlaceFilter2.) |
| UnmanagedOverlayImage |
Unmanaged overlay image.
(Inherited from BaseInPlaceFilter2.) |
Methods| Name | Description | |
|---|---|---|
| Apply(Bitmap) |
Apply filter to an image.
(Inherited from BaseInPlaceFilter.) |
| Apply(BitmapData) |
Apply filter to an image.
(Inherited from BaseInPlaceFilter.) |
| Apply(UnmanagedImage) |
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlaceFilter.) |
| Apply(UnmanagedImage, UnmanagedImage) |
Apply filter to an image in unmanaged memory.
(Inherited from BaseInPlaceFilter.) |
| ApplyInPlace(Bitmap) |
Apply filter to an image.
(Inherited from BaseInPlaceFilter.) |
| ApplyInPlace(BitmapData) |
Apply filter to an image.
(Inherited from BaseInPlaceFilter.) |
| ApplyInPlace(UnmanagedImage) |
Apply filter to an unmanaged image.
(Inherited from BaseInPlaceFilter.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| 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 difference filter takes two images (source and overlay images) of the same size and pixel format and produces an image, where each pixel equals to absolute difference between corresponding pixels from provided images.
The filter accepts 8 and 16 bpp grayscale images and 24, 32, 48 and 64 bpp color images for processing.
 Note |
|---|
| In the case if images with alpha channel are used (32 or 64 bpp), visualization of the result image may seem a bit unexpected - most probably nothing will be seen (in the case if image is displayed according to its alpha channel). This may be caused by the fact that after differencing the entire alpha channel will be zeroed (zero difference between alpha channels), what means that the resulting image will be 100% transparent. |
Sample usage:
// create filter Difference filter = new Difference( overlayImage ); // apply the filter Bitmap resultImage = filter.Apply( sourceImage );
Source image:
Overlay image:
Result image:
See Also