FingerImage.toBuffer Method

Module: FingerImage

Definition

Exports the image to a buffer.

The compression level meaning depends on the algorithm used:

  • For JPEG compression, the value is the expected quality and may vary from 1 to 100.

  • For JPEG2000 compression, the value is the compression rate and may vary from 1 to 512.

  • For PNG compression, the value is the compression rate and may vary from 1 to 10.

  • For all other formats, the value is ignored.

to_buffer(self, finger_image_format: ImageFormat, compression_level: float) -> bytearray

Parameters

finger_image_format ImageFormat
in The image format to export the image to.

compression_level float
in The compression level to be applied.

Returns

bytearray
Buffer that receives the image data.

Exceptions

An error has occurred during Finger Library execution.
Uint8List toBuffer(ImageFormat fingerImageFormat, double compressionLevel)

Parameters

fingerImageFormat ImageFormat
in The image format to export the image to.

compressionLevel double
in The compression level to be applied.

Returns

Uint8List
Buffer that receives the image data.

Exceptions

An error has occurred during Finger Library execution.
public byte[] ToBuffer(ImageFormat fingerImageFormat, float compressionLevel)

Parameters

fingerImageFormat ImageFormat
in The image format to export the image to.

compressionLevel float
in The compression level to be applied.

Returns

byte[]
Buffer that receives the image data.

Exceptions

An error has occurred during Finger Library execution.
public byte[] toBuffer(ImageFormat fingerImageFormat, float compressionLevel) throws FingerException

Parameters

fingerImageFormat ImageFormat
in The image format to export the image to.

compressionLevel float
in The compression level to be applied.

Returns

byte[]
Buffer that receives the image data.

Exceptions

An error has occurred during Finger Library execution.
public func toBuffer(fingerImageFormat: ImageFormat, compressionLevel: Float) throws -> [UInt8]

Parameters

fingerImageFormat ImageFormat
in The image format to export the image to.

compressionLevel Float
in The compression level to be applied.

Returns

[UInt8]
Buffer that receives the image data.

Exceptions

An error has occurred during Finger Library execution.
int id3FingerImage_ToBuffer (
    ID3_FINGER_IMAGE hFingerImage,
    id3FingerImageFormat eFingerImageFormat,
    float compressionLevel,
    unsigned char * data,
    int * dataSize)

Parameters

hFingerImage ID3_FINGER_IMAGE
in Handle to the FingerImage object.

eFingerImageFormat id3FingerImageFormat
in The image format to export the image to.

compressionLevel float
in The compression level to be applied.

data unsigned char *
out Buffer that receives the image data.

dataSize int *
in Size of the ‘data’ buffer. Receives the number of elements in the ‘data’ array.

Returns

int
An error code.
See id3FingerError file for the list of possible error codes.