Sepia Class

Sepia filter - old brown photo.

Inheritance Hierarchy

SystemObject
Accord.Imaging.FiltersBaseInPlacePartialFilter
Accord.Imaging.FiltersSepia

Namespace: Accord.Imaging.Filters
Assembly: Accord.Imaging (in Accord.Imaging.dll) Version: 3.8.0

Syntax

public sealed class Sepia : BaseInPlacePartialFilter

Public NotInheritable Class Sepia
	Inherits BaseInPlacePartialFilter

The Sepia type exposes the following members.

Constructors

	Name	Description
	Sepia	Initializes a new instance of the Sepia class.

Properties

	Name	Description
	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.)
	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.)

Remarks

The filter makes an image look like an old brown photo. The main idea of the algorithm:

1) RGB -> YIQ:

Y = 0.299 * R + 0.587 * G + 0.114 * B
I = 0.596 * R - 0.274 * G - 0.322 * B
Q = 0.212 * R - 0.523 * G + 0.311 * B

2) update:

I = 51
Q = 0

3) YIQ -> RGB:

R = 1.0 * Y + 0.956 * I + 0.621 * Q
G = 1.0 * Y - 0.272 * I - 0.647 * Q
B = 1.0 * Y - 1.105 * I + 1.702 * Q

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

Sample usage:

// create filter
Sepia filter = new Sepia( );
// apply the filter
filter.ApplyInPlace( image );

Initial image:

Result image: