ImageFilterType enum

The image filter types.

Inheritance

• Object
• Enum
• ImageFilterType

Constructors

ImageFilterType()

const

Values

NONE → const ImageFilterType

Passthrough filter. Does not alter the image. */

COLOR → const ImageFilterType

Optimizes colors, contrast and brightness. Usecase: photos. */

GRAYSCALE → const ImageFilterType

Standard grayscale filter. Creates a grayscaled 8-bit image and optimizes contrast and dynamic range. */

BINARIZED → const ImageFilterType

Standard binarization filter with contrast optimization. Creates a grayscaled 8-bit image with mostly black or white pixels. Usecase: Preparation for optical character recognition. */

COLOR_DOCUMENT → const ImageFilterType

Fixes white-balance and cleans up the background. Usecase: images of paper documents. */

PURE_BINARIZED → const ImageFilterType

A filter for binarizing an image. Creates an 8-bit image with pixel values set to eiter 0 or 255. Usecase: Preparation for optical character recognition. */

BACKGROUND_CLEAN → const ImageFilterType

Cleans up the background and tries to preserve photos within the image. Usecase: magazine pages, flyers. */

BLACK_AND_WHITE → const ImageFilterType

Black and white filter with background cleaning. Creates a grayscaled 8-bit image with mostly black or white pixels. Usecase: Textual documents or documents with black and white illustrations. */

OTSU_BINARIZATION → const ImageFilterType

A filter for black and white conversion using OTSU binarization. */

DEEP_BINARIZATION → const ImageFilterType

A filter for black and white conversion primary used for low-contrast documents. */

EDGE_HIGHLIGHT → const ImageFilterType

A filter that enhances edges in low-contrast documents. */

LOW_LIGHT_BINARIZATION → const ImageFilterType

Binarization filter primary inteded to use on low-contrast documents with heavy shadows. */

LOW_LIGHT_BINARIZATION_2 → const ImageFilterType

Binarization filter primary intended to use on low-contrast documents with heavy shadows. */

SENSITIVE_BINARIZATION → const ImageFilterType

Binarization filter for poor quality printed papers. */

PURE_GRAY → const ImageFilterType

Standard grayscale filter. Creates a grayscaled 8-bit image. */

Properties

hashCode → int

The hash code for this object.

no setter, inherited

index → int

A numeric identifier for the enumerated value.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

values → const List<ImageFilterType>

A constant List of the values in this enum, in order of their declaration.