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DecodeImage

public final class DecodeImage

Function for decode_bmp, decode_gif, decode_jpeg, and decode_png.

Detects whether an image is a BMP, GIF, JPEG, or PNG, and performs the appropriate operation to convert the input bytes string into a Tensor of type dtype.

NOTE: decode_gif returns a 4-D array [num_frames, height, width, 3], as opposed to decode_bmp, decode_jpeg and decode_png, which return 3-D arrays [height, width, num_channels]. Make sure to take this into account when constructing your graph if you are intermixing GIF files with BMP, JPEG, and/or PNG files. Alternately, set the expand_animations argument of this function to False, in which case the op will return 3-dimensional tensors and will truncate animated GIF files to the first frame.

Nested Classes

class DecodeImage.Options Optional attributes for DecodeImage  

Public Methods

Output<T>
asOutput()
Returns the symbolic handle of a tensor.
static DecodeImage.Options
channels(Long channels)
static <T extends Number> DecodeImage<T>
create(Scope scope, Operand<String> contents, Class<T> dtype, Options... options)
Factory method to create a class wrapping a new DecodeImage operation.
static DecodeImage<UInt8>
create(Scope scope, Operand<String> contents, Options... options)
Factory method to create a class wrapping a new DecodeImage operation using default output types.
static DecodeImage.Options
expandAnimations(Boolean expandAnimations)
Output<T>
image()
3-D with shape `[height, width, channels]` or 4-D with shape `[frame, height, width, channels]`..

Inherited Methods

Public Methods

public Output<T> asOutput ()

Returns the symbolic handle of a 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 DecodeImage.Options channels (Long channels)

Parameters
channels Number of color channels for the decoded image.

public static DecodeImage<T> create (Scope scope, Operand<String> contents, Class<T> dtype, Options... options)

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

Parameters
scope current scope
contents 0-D. The encoded image bytes.
dtype The desired DType of the returned Tensor.
options carries optional attributes values
Returns
  • a new instance of DecodeImage

public static DecodeImage<UInt8> create (Scope scope, Operand<String> contents, Options... options)

Factory method to create a class wrapping a new DecodeImage operation using default output types.

Parameters
scope current scope
contents 0-D. The encoded image bytes.
options carries optional attributes values
Returns
  • a new instance of DecodeImage

public static DecodeImage.Options expandAnimations (Boolean expandAnimations)

Parameters
expandAnimations Controls the output shape of the returned op. If True, the returned op will produce a 3-D tensor for PNG, JPEG, and BMP files; and a 4-D tensor for all GIFs, whether animated or not. If, False, the returned op will produce a 3-D tensor for all file types and will truncate animated GIFs to the first frame.

public Output<T> image ()

3-D with shape `[height, width, channels]` or 4-D with shape `[frame, height, width, channels]`..