Vector magnetic-field imaging is important for magnetic-material characterization and electromagnetic analysis of microelectronic devices, where spatially resolved field information can also provide access to the underlying magnetic-source distribution. Here, we demonstrate a fiber-coupled diamond magnetometer that combines joint eight-transition ODMR reconstruction, coil-defined laboratory-frame calibration, and vector magnetic-field imaging. Simultaneous fitting of the eight transitions to a common magnetic-field vector gives a maximum absolute deviation of 30.4 mG over independently calibrated fields from 50 to 150 G, with measurement repeatability below 16.1 mG. The calibrated probe is further applied to vector stray-field imaging of a patterned Pt/Co thin film at two measurement heights separated by a controlled 10 µm displacement. Independent reconstruction of the two data sets gives effective sensor–sample separations of 16.70 and 27.55 µm, corresponding to an inferred height difference of 10.85 µm. The known relative height is then incorporated into a dual-height reconstruction in which one perpendicular magnetization distribution is used to account for the vector stray fields measured at both heights. The resulting reconstruction gives an effective lower sensor–sample separation of 16.73 µm, a magnetization scale of 1.007 MA/m, and a combined three-component field RMSE of 13.73 mG. Using simulated vector fields at two heights, we recover a common magnetization direction and a spatially varying magnitude for both in-plane and tilted sources. For four separated magnetic elements with prescribed geometry, we jointly recover the magnetization direction and magnitude distribution of each element from their superposed stray fields.These results establish a compact route from calibrated vector magnetic-field imaging to experimentally constrained magnetic-source reconstruction.