GrayImage class

An gray scaled image, each byte is a gray value in(0~255)

Inheritance

• Object
• AbstractImage
• GrayImage

Constructors

GrayImage(dynamic width, dynamic height)

GrayImage.raw(Uint8List data, {required int width, required int height})

Properties

buffer → Uint8List

the gray data, each element is a gray pixel (0-255)

no setter

bytePerPixel → int

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

height → int

no setter, override

pixels → List<int>

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width → int

no setter, override

Methods

binaryzation({int middle = 0x80}) → void

binaryzation this image

clip(int newWidth, int newHeight, [int offsetX = 0, int offsetY = 0]) → void

override

copy() → GrayImage

copy and return a new GrayImage

override

deNoise({int middle = 0x80, int disparity = 0x20}) → int

Remove noise

drawRect(Rect rect, Color color, [BlendMode mode = BlendMode.srcOver]) → void

override

getChannel(int x, int y, [ImageChannel? channel]) → int

get the gray value(0-255) at Point(x, y). channel is ignored

override

getChannelSafe(int x, int y, [int? defaultValue, ImageChannel? channel]) → int

get the gray value(0-255) at Point(x, y) without exception. channel is ignored

override

getColor(int x, int y) → Color

override

getColorSafe(int x, int y, [Color? defaultColor = const Color(0x00ffffff)]) → Color

override

getImage() → Future<Image>

Get the Image Object from this image

getOffset(int x, int y) → int

inherited

inverse() → void

inverse phase

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

resize(double ratio) → void

override

resizeTo(int newWidth, int newHeight, [SampleMode sample = SampleMode.nearest]) → void

override

rotate(double radian, {SampleMode sample = SampleMode.bilinear, int bgColor = 255, bool isClip = false}) → void

override

scaleDown(double scale) → void

use for zoom out an image

override

setChannel(int x, int y, int value, [ImageChannel? channel]) → void

set the gray value(0-255) at Point(x, y). channel is ignored

override

setChannelSafe(int x, int y, int value, [ImageChannel? channel]) → void

set the gray value(0-255) at Point(x, y) without exception. channel is ignored

override

setColor(int x, int y, Color color, [GrayScale? grayScale]) → void

set color(will be grayscale) at Point(x, y)

override

setColorSafe(int x, int y, Color color) → void

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited