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Class: UniappImagePixelInformation
Classdesc
JavaScript gets image pixel information
Implements
ImagePixelInformationInterface
Classes
UniappImagePixelInformation
Param
grayscale threshold（default 100）
Hierarchy
ImagePixelInformation↳
UniappImagePixelInformation
Constructors
constructor
• new UniappImagePixelInformation(grayThreshold)
Parameters
| Name | Type |
|---|---|
grayThreshold | number |
Overrides
ImagePixelInformation.constructor
Defined in
components/imagePixelInformation/index.ts:60
Properties
grayThreshold
• grayThreshold: number
@description: grayscale threshold（default 100）
Defined in
components/imagePixelInformation/index.ts:59
Methods
uniGetImageData
▸ uniGetImageData(canvasId, imageResource, width?, height?, callback): void
@description: Uniapp Get image pixel information（rgba）
Parameters
| Name | Type | Default value | Description |
|---|---|---|---|
canvasId | string | undefined | canvas id |
imageResource | string | undefined | image path |
width | number | 256 | The width of the rectangle from which the pixel data will be retrieved; |
height | number | 256 | The height of the rectangle from which the pixel data will be retrieved |
callback | (pixelInformation: object) => void | undefined | callback function |
Returns
void
Inherited from
ImagePixelInformation.uniGetImageData