FlatFieldCorrection Class |
Namespace: Accord.Imaging.Filters
The FlatFieldCorrection type exposes the following members.
Name | Description | |
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FlatFieldCorrection |
Initializes a new instance of the FlatFieldCorrection class.
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FlatFieldCorrection(Bitmap) |
Initializes a new instance of the FlatFieldCorrection class.
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Name | Description | |
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BackgoundImage |
Background image used for flat field correction.
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FormatTranslations |
Format translations dictionary.
(Overrides BaseInPlaceFilterFormatTranslations.) | |
UnmanagedBackgoundImage |
Background image used for flat field correction.
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Name | Description | |
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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.) | |
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 BaseInPlaceFilterProcessFilter(UnmanagedImage).) | |
ToString | Returns a string that represents the current object. (Inherited from Object.) |
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.) |
The goal of flat-field correction is to remove artifacts from 2-D images that are caused by variations in the pixel-to-pixel sensitivity of the detector and/or by distortions in the optical path. The filter requires two images for the input - source image, which represents acquisition of some objects (using microscope, for example), and background image, which is taken without any objects presented. The source image is corrected using the formula: src = bgMean * src / bg, where src - source image's pixel value, bg - background image's pixel value, bgMean - mean value of background image.
Note |
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If background image is not provided, then it will be automatically generated on each filter run from source image. The automatically generated background image is produced running Gaussian Blur on the original image with (sigma value is set to 5, kernel size is set to 21). Before blurring the original image is resized to 1/3 of its original size and then the result of blurring is resized back to the original size. |
Note |
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The class processes only grayscale (8 bpp indexed) and color (24 bpp) images. |
Sample usage:
// create filter FlatFieldCorrection filter = new FlatFieldCorrection( bgImage ); // process image filter.ApplyInPlace( sourceImage );
Source image:
Background image:
Result image: