Cannot do ImageStack.{transform,apply} after ImageStack.{sel,isel}

[ttung]

The resulting ImageStack takes a reference to the backing MPDataArray. When we pass the MPDataArray to the child processes, we reshape the raw byte buffer to the shape of the resulting ImageStack. However, the MPDataArray is sized to reflect the original ImageStack's size, and so the reshape operation fails.

[ambrosejcarr]

attempts to do in-place operations using starfish.image.Filter also fail after .sel and .isel

[ttung]

That does not surprise me.

[ambrosejcarr]

@ttung you mentioned that if we swap starfish to multi-threading you think this issue goes away. What is your impression of the impacts on:

1. Starfish's execution speed
2. The complexity of the ImageStack object. Can we do away with the extra MPDataArray container and operate directly on the numpy array?

[ttung]

1. Starfish will likely be slower. Not clear how much slower it will be. Most numpy operations will not be affected. Non-numpy operations may be.
2. Yes.