Decode a TIFF-encoded image to a uint8 tensor.

contents A Tensor of type string. 0-D. The TIFF-encoded image.
index A Tensor of type int64. 0-D. The 0-based index of the frame inside TIFF-encoded image.
name A name for the operation (optional).

A Tensor of type uint8 and shape of [height, width, 4] (RGBA).