We just updated the Intensity Projection plugin to improve the performance.
Still it remains a magnitude order slower than Icy < 2.0 version because we had to change the algorithm to make it compatible with the new virtual mode of Icy (which mean that you can compute intensity projection for a Z stack larger than your available memory).
On my test image:
* Icy < 2.0 version was computing projection in 0.4 second
* previous Icy >= 2.0 version was computing projection in ~100 seconds (!!)
* new Icy >= 2.0 version computed projection in 4 seconds
So unfortunately it remains much slower than older versions but probably acceptable compared to what you had just before.
Best,
– Stephane
