(a) A pinhole object located at ρ = 0 is illuminated by single Gaussian-shaped spots with different central locations. The colors indicate the positions of the Gaussian spots. The circles on the red solid curve indicate the distribution of the bucket measurement values. (b) Conventional ghost image of the pinhole reconstructed from the overlaps of the multiplies of the reference Gaussian envelops with the corresponding bucket values. (c) Localized ghost image of the pinhole. Each reference Gaussian envelop in (b) is replaced by its central point. The red solid curve indicates a 0.6 I max threshold to the bucket measurement.