Ground truth annotations for mitochondria, ER, and Golgi apparatus. Passing through a FIB-SEM volume with contrast equalized using CLAHE. Image is from Cell 1 HEK293A prepared by CF and imaged at ∼5 nm isotropic resolution. The video shows ground truth annotations for mitochondria (cyan), ER (red), and Golgi apparatus (green). The annotations were generated for all mitochondria and Golgi apparatus within the FIB-SEM volume, and all ER within the highlighted 8 × 3 × 3 µm block (orange box).