QR Code Specifications

Size of the QR Code is determined by:

Length of the data to be encoded
Error correction level (L, M, Q, H)
Pixels per block
Margin (White space around QR code)

Following options can be provided to the user w.r.t the text embedded in the QR code image

Text to be embedded
Font Name
Font Size
Text Tracking(To control spacing between characters)

Following options can be provided to the user w.r.t the QR code image

Colour model of the image(RGB/CMYK)
Border size
File format of the QR image

Parameter	Description	Mandatory/ Optional	Values Set	Default Value
data	Data to be encoded as QR image	Mandatory	-	-
errorCorrectionLevel	Error correction level for the generated QR code	Optional	L, M, Q, H	H
pixelsPerBlock	Number of pixels to be painted per bit-matrix encoded value	Optional	-	2
margin	Number of pixels as margin for QR code	Optional	-	3
text	Text to be embedded in QR image	Optional	-	-
fontName	Font name of the text	Optional	-	Verdana
fontSize	Font size of the text	Optional	-	11
tracking	Tracking value to be set for TextAttribute.TRACKING	Optional	-0.1 to 0.3 recommended	0.1
colourModel	Colour model of the QR image	Optional	RGB, CMYK	RGB
borderSize	QR image border size in pixels	Optional	-	1
imageFormat	File format of the QR image	Optional	-	PNG

Sample Values:

{
  "qrSpec": {
    "data": "http://www.sunbird.org/dial/2A42UH",
    "errorCorrectionLevel": "H",
    "pixelsPerBlock": 3,
    "margin": 3
  },
  "textSpec": {
    "text": "2A42UH",
    "fontName": "Verdana",
    "fontSize": 12,
    "tracking": -0.1
  },
  "imageSpec": {
    "imageFormat": "png",
    "colourModel": "CMYK",
    "borderSize": 2
  }
}