FrameHelper | microblink

Helper for get detailed information from the frame of the image as RAW pixels array, with defined width and height

Hierarchy

FrameHelper

Index

Methods

Methods

Static Private calculateFrameQuality

calculateFrameQuality(rgbaImgData: Uint8ClampedArray, width: number, height: number): number

- Defined in frameHelper.ts:19
Calculate frame quality

Parameters
- rgbaImgData: Uint8ClampedArray
  
  is an RGB array (3n)=>RED, (3n+1)=>GREEN, (3n+2)=>BLUE, where n is pixel index in 2D grid
- width: number
  
  is the frame horizontal dimension in pixels
- height: number
  
  is the frame vertical dimension in pixels
Returns number

Static getFrameQuality

getFrameQuality(pixelData: ImageData): number

- Defined in frameHelper.ts:9
Get frame quality

Parameters
- pixelData: ImageData
  
  is ImageData from canvas.getContext("2d").getImageData(0, 0, canvas.width, canvas.height)
Returns number

Static Private getIntensity

getIntensity(rgbaImgData: Uint8ClampedArray, row: number, col: number, width: number): number

- Defined in frameHelper.ts:83
Get pixel intensity

Parameters
- rgbaImgData: Uint8ClampedArray
  
  is an RGB array (3n)=>RED, (3n+1)=>GREEN, (3n+2)=>BLUE, where n is pixel index in 2D grid
- row: number
  
  is an row of the pixel in the frame
- col: number
  
  is na column of the pixel in the frame
- width: number
  
  is the frame horizontal dimension in pixels
Returns number

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