46 lines
2.0 KiB
Go
46 lines
2.0 KiB
Go
package gozxing
|
|
|
|
type Binarizer interface {
|
|
GetLuminanceSource() LuminanceSource
|
|
|
|
/**
|
|
* Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
|
|
* cached data. Callers should assume this method is expensive and call it as seldom as possible.
|
|
* This method is intended for decoding 1D barcodes and may choose to apply sharpening.
|
|
* For callers which only examine one row of pixels at a time, the same BitArray should be reused
|
|
* and passed in with each call for performance. However it is legal to keep more than one row
|
|
* at a time if needed.
|
|
*
|
|
* @param y The row to fetch, which must be in [0, bitmap height)
|
|
* @param row An optional preallocated array. If null or too small, it will be ignored.
|
|
* If used, the Binarizer will call BitArray.clear(). Always use the returned object.
|
|
* @return The array of bits for this row (true means black).
|
|
* @throws NotFoundException if row can't be binarized
|
|
*/
|
|
GetBlackRow(y int, row *BitArray) (*BitArray, error)
|
|
|
|
/**
|
|
* Converts a 2D array of luminance data to 1 bit data. As above, assume this method is expensive
|
|
* and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
|
|
* may not apply sharpening. Therefore, a row from this matrix may not be identical to one
|
|
* fetched using getBlackRow(), so don't mix and match between them.
|
|
*
|
|
* @return The 2D array of bits for the image (true means black).
|
|
* @throws NotFoundException if image can't be binarized to make a matrix
|
|
*/
|
|
GetBlackMatrix() (*BitMatrix, error)
|
|
|
|
/**
|
|
* Creates a new object with the same type as this Binarizer implementation, but with pristine
|
|
* state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache
|
|
* of 1 bit data. See Effective Java for why we can't use Java's clone() method.
|
|
*
|
|
* @param source The LuminanceSource this Binarizer will operate on.
|
|
* @return A new concrete Binarizer implementation object.
|
|
*/
|
|
CreateBinarizer(source LuminanceSource) Binarizer
|
|
|
|
GetWidth() int
|
|
GetHeight() int
|
|
}
|