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Decode a PNG-encoded image to a uint8 or uint16 tensor.

Used in the notebooks

Used in the guide Used in the tutorials

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 PNG-encoded image.
  • 1: output a grayscale image.
  • 3: output an RGB image.
  • 4: output an RGBA image.

If needed, the PNG-encoded image is transformed to match the requested number of color channels.

This op also supports decoding JPEGs and non-animated GIFs since the interface is the same, though it is cleaner to use

contents A Tensor of type string. 0-D. The PNG-encoded image.
channels An optional int. Defaults to 0. Number of color channels for the decoded image.
dtype An optional tf.DType from: tf.uint8, tf.uint16. Defaults to tf.uint8.
name A name for the operation (optional).

A Tensor of type dtype.