SpinX S tage 3 evaluation. (a) Bar chart shows accuracy without (gray) and with Stage 3 (black) of SpinX’s architecture for spindle and cell membrane models. (b) Wrongly predicted images from spindle and cell membrane models were further analyzed using our error classification system (described in Fig. 2 c). n = 100 randomly selected images from our image pool were used for studies without Stage 3. n = 630 images from 10 randomly selected 3D time-lapse movies were used for studies with Stage 3.