`qrio`¶

qrio module.

Provides the QRDecoder object.

Available on these boards

class qrio.PixelPolicy¶

EVERY_BYTE :PixelPolicy¶: The input buffer to QRDecoder.decode consists of greyscale values in every byte

EVEN_BYTES :PixelPolicy¶: The input buffer to QRDecoder.decode consists of greyscale values in positions 0, 2, …, and ignored bytes in positions 1, 3, …. This can decode directly from YUV images where the even bytes hold the Y (luminance) data.

ODD_BYTES :PixelPolicy¶: The input buffer to QRDecoder.decode consists of greyscale values in positions 1, 3, …, and ignored bytes in positions 0, 2, …. This can decode directly from YUV images where the odd bytes hold the Y (luminance) data

class qrio.QRDecoder(width: int, height: int)¶

Construct a QRDecoder object

Paramètres:

decode(buffer: _typing.ReadableBuffer, pixel_policy: PixelPolicy = PixelPolicy.EVERY_BYTE) → List[QRInfo]¶: Decode zero or more QR codes from the given image. The size of the buffer must be at least length``×``width bytes for EVERY_BYTE, and 2×``length``×``width`` bytes for EVEN_BYTES or ODD_BYTES.

class qrio.QRInfo¶

Information about a decoded QR code

data_type :Union[str, int]¶: The encoding of the payload as a string (if a standard encoding) or int (if not standard)

qrio¶