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Dual-color multiple-particle imaging. (a) Overlay of both green- and red- channel images that are collected simultaneously by two camera showing 8 green spheres and 6 red spheres and 8 green spheres (bar: 20 µm). Respective (b) green channel image, and (c) red channel image. (d) 3D projection of total 14 spheres in the volume of 180 × 180 × 100 µm3.
