View Source Image.QRcode (image v0.16.0)

Detects and decodes QRcodes.

Note that the implementation, which is based upon eVision requires that the image be a 3-channel image in order to support detection.

Images that are in different formats must be converted first.

Link to this section Summary

Functions

decode(image)

Detects and decodes a QR code in an image.

encode(string, options \\ [])

Encodes a string as a QRCode.

Link to this section Functions

decode(image)

(since 0.9.0)

Detects and decodes a QR code in an image.

arguments
Arguments

image is any Vix.Vips.Image.t/0 that has three bands (for example, a typical srgb image).

returns
Returns

{:ok, string} or
{:error, reason}

note
Note

Only images with three bands (channels) are supported. This restriction may be lifted in a future release.

encode(string, options \\ [])

(since 0.13.0)

Encodes a string as a QRCode.

arguments
Arguments

string is any string to be encoded,
options is a keyword list of options. The default is size: :auto.

options
Options

:size is the size in pixels of the QRcode dimensions. The default is :auto in which the generated QRcode will be the minimum dimensions necessary to encode the string.

returns
Returns

{:ok, image} or
{:error, reason}