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.
Args
contents
A Tensor of type string. 0-D. The encoded image bytes.
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, tf.float32. Defaults to tf.uint8. The desired DType of the returned Tensor.
expand_animations
An optional bool. Defaults to True. 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.
