Decode 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.
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.
This op also supports decoding PNGs and non-animated GIFs since the interface is
the same, though it is cleaner to use tf.io.decode_image
.
Nested Classes
class | DecodeJpeg.Options | Optional attributes for DecodeJpeg
|
Constants
String | OP_NAME | The name of this op, as known by TensorFlow core engine |
Public Methods
static DecodeJpeg.Options |
acceptableFraction(Float acceptableFraction)
|
Output<TUint8> |
asOutput()
Returns the symbolic handle of the tensor.
|
static DecodeJpeg.Options |
channels(Long channels)
|
static DecodeJpeg |
create(Scope scope, Operand<TString> contents, Options... options)
Factory method to create a class wrapping a new DecodeJpeg operation.
|
static DecodeJpeg.Options |
dctMethod(String dctMethod)
|
static DecodeJpeg.Options |
fancyUpscaling(Boolean fancyUpscaling)
|
Output<TUint8> |
image()
3-D with shape `[height, width, channels]`..
|
static DecodeJpeg.Options |
ratio(Long ratio)
|
static DecodeJpeg.Options |
tryRecoverTruncated(Boolean tryRecoverTruncated)
|
Inherited Methods
Constants
public static final String OP_NAME
The name of this op, as known by TensorFlow core engine
Public Methods
public static DecodeJpeg.Options acceptableFraction (Float acceptableFraction)
Parameters
acceptableFraction | The minimum required fraction of lines before a truncated input is accepted. |
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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 DecodeJpeg.Options channels (Long channels)
Parameters
channels | Number of color channels for the decoded image. |
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public static DecodeJpeg create (Scope scope, Operand<TString> contents, Options... options)
Factory method to create a class wrapping a new DecodeJpeg operation.
Parameters
scope | current scope |
---|---|
contents | 0-D. The JPEG-encoded image. |
options | carries optional attributes values |
Returns
- a new instance of DecodeJpeg
public static DecodeJpeg.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.) |
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public static DecodeJpeg.Options fancyUpscaling (Boolean fancyUpscaling)
Parameters
fancyUpscaling | If true use a slower but nicer upscaling of the chroma planes (yuv420/422 only). |
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public static DecodeJpeg.Options tryRecoverTruncated (Boolean tryRecoverTruncated)
Parameters
tryRecoverTruncated | If true try to recover an image from truncated input. |
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