DecodeAndCropJpeg

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public final class DecodeAndCropJpeg

Decode and Crop a JPEG-encoded image to a uint8 tensor.

The attr `channels` indicates the desired number of color channels for the decoded image.

Accepted values are:

  • 0: Use the number of channels in the JPEG-encoded image.
  • 1: output a grayscale image.
  • 3: output an RGB image.
If needed, the JPEG-encoded image is transformed to match the requested number of color channels.

The attr `ratio` allows downscaling the image by an integer factor during decoding. Allowed values are: 1, 2, 4, and 8. This is much faster than downscaling the image later.

It is equivalent to a combination of decode and crop, but much faster by only decoding partial jpeg image.

Nested Classes

class DecodeAndCropJpeg.Options Optional attributes for DecodeAndCropJpeg  

Constants

String OP_NAME The name of this op, as known by TensorFlow core engine

Public Methods

static DecodeAndCropJpeg.Options
acceptableFraction(Float acceptableFraction)
Output<TUint8>
asOutput()
Returns the symbolic handle of the tensor.
static DecodeAndCropJpeg.Options
channels(Long channels)
static DecodeAndCropJpeg
create(Scope scope, Operand<TString> contents, Operand<TInt32> cropWindow, Options... options)
Factory method to create a class wrapping a new DecodeAndCropJpeg operation.
static DecodeAndCropJpeg.Options
dctMethod(String dctMethod)
static DecodeAndCropJpeg.Options
fancyUpscaling(Boolean fancyUpscaling)
Output<TUint8>
image()
3-D with shape `[height, width, channels]`..
static DecodeAndCropJpeg.Options
ratio(Long ratio)
static DecodeAndCropJpeg.Options
tryRecoverTruncated(Boolean tryRecoverTruncated)

Inherited Methods

Constants

public static final String OP_NAME

The name of this op, as known by TensorFlow core engine

Constant Value: "DecodeAndCropJpeg"

Public Methods

public static DecodeAndCropJpeg.Options acceptableFraction (Float acceptableFraction)

Parameters
acceptableFraction The minimum required fraction of lines before a truncated input is accepted.

public Output<TUint8> asOutput ()

Returns the symbolic handle of the tensor.

Inputs to TensorFlow operations are outputs of another TensorFlow operation. This method is used to obtain a symbolic handle that represents the computation of the input.

public static DecodeAndCropJpeg.Options channels (Long channels)

Parameters
channels Number of color channels for the decoded image.

public static DecodeAndCropJpeg create (Scope scope, Operand<TString> contents, Operand<TInt32> cropWindow, Options... options)

Factory method to create a class wrapping a new DecodeAndCropJpeg operation.

Parameters
scope current scope
contents 0-D. The JPEG-encoded image.
cropWindow 1-D. The crop window: [crop_y, crop_x, crop_height, crop_width].
options carries optional attributes values
Returns
  • a new instance of DecodeAndCropJpeg

public static DecodeAndCropJpeg.Options dctMethod (String dctMethod)

Parameters
dctMethod string specifying a hint about the algorithm used for decompression. Defaults to "" which maps to a system-specific default. Currently valid values are ["INTEGER_FAST", "INTEGER_ACCURATE"]. The hint may be ignored (e.g., the internal jpeg library changes to a version that does not have that specific option.)

public static DecodeAndCropJpeg.Options fancyUpscaling (Boolean fancyUpscaling)

Parameters
fancyUpscaling If true use a slower but nicer upscaling of the chroma planes (yuv420/422 only).

public Output<TUint8> image ()

3-D with shape `[height, width, channels]`..

public static DecodeAndCropJpeg.Options ratio (Long ratio)

Parameters
ratio Downscaling ratio.

public static DecodeAndCropJpeg.Options tryRecoverTruncated (Boolean tryRecoverTruncated)

Parameters
tryRecoverTruncated If true try to recover an image from truncated input.