What does TensorFlow's `conv2d_transpose()` operation do?

Question

The documentation for the conv2d_transpose() operation does not clearly explain what it does:

The transpose of conv2d.

This opera

Answer 1

This is the best explanation I've seen online how convolution transpose works is here.

I'll give my own short description. It applies convolution with a fractional stride. In other words spacing out the input values (with zeroes) to apply the filter over a region that's potentially smaller than the filter size.

As for the why one would want to use it. It can be used as a sort of upsampling with learned weights as opposed to bilinear interpolation or some other fixed form of upsampling.