Algorithm 1: Query image injection.

1 Conduct map matching for trajectory $\mathrm{T}$ ; 2 Estimate the travel speed in road segment $\mathrm{e}$ ; 3 Determine the image injection period $\left[{\mathrm{t}}_{\mathrm{s}},{\mathrm{t}}_{\mathrm{e}}\right]$ ; 4 Perform object detection and tracking for video frames in $\left[{\mathrm{t}}_{\mathrm{s}},{\mathrm{t}}_{\mathrm{e}}\right]$ ; 5 Randomly select a detected object ${\mathrm{O}}_{\mathrm{s}}$ ; 6 for each video frame $\mathrm{f}$ within $\left[{\mathrm{t}}_{\mathrm{s}},{\mathrm{t}}_{\mathrm{e}}\right]$ do 7 $\mathrm{bbox}\leftarrow$ the bounding box of ${\mathrm{O}}_{\mathrm{s}}$ in $\mathrm{f}$ ; 8 Randomly select an image ${\mathrm{F}}_{\mathrm{q}}$ from gallery $\mathcal{L}$ ; 9 Resize ${\mathrm{F}}_{\mathrm{q}}$ with equal size to $\mathrm{bbox}$ ; 10 Replace ${\mathrm{O}}_{\mathrm{s}}$ in frame $\mathrm{f}$ with ${\mathrm{F}}_{\mathrm{q}}$ ;