tensorflow:: ops:: DecodeJpeg
#include <image_ops.h>
Decode a JPEG-encoded image to a uint8 tensor.
Summary
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.
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
.
Args:
- scope: A Scope object
- contents: 0-D. The JPEG-encoded image.
Optional attributes (see Attrs
):
- channels: Number of color channels for the decoded image.
- ratio: Downscaling ratio.
- fancy_upscaling: If true use a slower but nicer upscaling of the chroma planes (yuv420/422 only).
- try_recover_truncated: If true try to recover an image from truncated input.
- acceptable_fraction: The minimum required fraction of lines before a truncated input is accepted.
- dct_method: 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.)
Returns:
Output
: 3-D with shape[height, width, channels]
..
Constructors and Destructors |
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DecodeJpeg(const ::tensorflow::Scope & scope, ::tensorflow::Input contents)
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DecodeJpeg(const ::tensorflow::Scope & scope, ::tensorflow::Input contents, const DecodeJpeg::Attrs & attrs)
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Public attributes |
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image
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operation
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Public functions |
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node() const
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::tensorflow::Node *
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operator::tensorflow::Input() const
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operator::tensorflow::Output() const
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Public static functions |
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AcceptableFraction(float x)
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Channels(int64 x)
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DctMethod(StringPiece x)
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FancyUpscaling(bool x)
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Ratio(int64 x)
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TryRecoverTruncated(bool x)
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Structs |
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tensorflow:: |
Optional attribute setters for DecodeJpeg. |
Public attributes
image
::tensorflow::Output image
operation
Operation operation
Public functions
DecodeJpeg
DecodeJpeg( const ::tensorflow::Scope & scope, ::tensorflow::Input contents )
DecodeJpeg
DecodeJpeg( const ::tensorflow::Scope & scope, ::tensorflow::Input contents, const DecodeJpeg::Attrs & attrs )
node
::tensorflow::Node * node() const
operator::tensorflow::Input
operator::tensorflow::Input() const
operator::tensorflow::Output
operator::tensorflow::Output() const
Public static functions
AcceptableFraction
Attrs AcceptableFraction( float x )
Channels
Attrs Channels( int64 x )
DctMethod
Attrs DctMethod( StringPiece x )
FancyUpscaling
Attrs FancyUpscaling( bool x )
Ratio
Attrs Ratio( int64 x )
TryRecoverTruncated
Attrs TryRecoverTruncated( bool x )