Fig. 2.

Simulation of resected image ${\mathit{X}}_{\text{sim}}$. We use a checkerboard for visualization. Two scalar-valued images ${\mathit{X}}_{\text{pre}}$ (a) and ${\mathit{X}}_2$ (b) are blended using ${\mathit{Y}}_{\text{sim}}$ (c) and ${\sigma }_i=0\mathrm{mm}$ to create an image with hard boundaries (d) and ${\sigma }_i=5\mathrm{mm}$ (e) for an image with soft boundaries (f), mimicking partial-volume effects