tf.io.decode_png

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

View aliases

Main aliases

tf.image.decode_png

Compat aliases for migration

See Migration guide for more details.

tf.compat.v1.image.decode_png, tf.compat.v1.io.decode_png

tf.io.decode_png(
    contents, channels=0, dtype=tf.dtypes.uint8, name=None
)

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 tf.io.decode_image.

Args
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).

Returns
A Tensor of type dtype.