Fig. 3.

Nucleus detection of the proposed methods, $\mathcal{S}+{\mathcal{T}}_{\mathcal{S}\leftrightarrow \mathcal{T}}^{UDA}$ and $\mathcal{S}+{\mathcal{T}}_{\mathcal{S}\leftrightarrow \mathcal{T}}^{SSDA}$, on the H&E (rows 1 ~ 2), DAPI (rows 3 ~ 4) and IHC (rows 5 ~ 6) datasets. The red-rectangle regions in rows 1, 3, and 5 are zoomed in rows 2, 4 and 6, respectively. Columns (a) and (f) denote original images and gold standard annotations (green dots), respectively. Columns (b) and (c) represent the detection results of $\mathcal{S}+{\mathcal{T}}_{\mathcal{S}\leftrightarrow \mathcal{T}}^{UDA}$ in different experimental settings (source-to-target), and columns (d) and (e) are the results of $\mathcal{S}+{\mathcal{T}}_{\mathcal{S}\leftrightarrow \mathcal{T}}^{SSDA}$ with 5% target training annotations.