fixing blob radius calculation in 2d #117

Job	Run time
Lint	4m 49s
Python-3.9-windows-latest	40m 33s
Python-3.10-windows-latest	40m 53s
Python-3.11-windows-latest	42m 49s
Python-3.9-ubuntu-latest	3m 9s
Python-3.10-ubuntu-latest	7m 12s
Python-3.11-ubuntu-latest	7m 25s
Python-3.9-windows-latest	5m 49s
Python-3.10-windows-latest	6m 10s
Python-3.11-windows-latest	4m 16s
Python-3.9-ubuntu-latest	2m 36s
Python-3.10-ubuntu-latest	2m 28s
Python-3.11-ubuntu-latest	2m 33s
BaristaSeq Notebook Test	2m 4s
DARTFISH Notebook Test	39s
ISS Notebook Test	1m 16s
Docker Smoketest	1m 2s
iss_pipeline.py Data Processing Example	1m 59s
MERFISH Notebook Test	1m 54s
SeqFISH Notebook Test	21s
osmFISH Notebook Test	2m 24s
Simulation Notebook Test	21s
3D smFISH Data Processing Example	1m 56s
smFISH Notebook Test	2m 0s
STARmap Notebook Test	28s
	3h 7m 6s

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