English: A false-color average of several images of the fluorescence emitted by individual cesium 133 atoms, which have been laser cooled from a vapor in a vacuum chamber and confined in a grid of 1225 optical traps formed by laser light. The spacing between each trapped cesium atom (red dots in the image) is 3 microns, so the entire is image is about 100 x 100 microns, roughly the size of the cross-section of a human hair. The trapped atoms are weakly illuminated by 852 nanometer (nm) laser light, which is then emitted by the atoms and imaged onto a sensitive camera (electron-multiplying charge coupled device, or EMCCD) with a high numerical aperture lens (NA=0.55). The image set is divided by the mean background noise and then processed using independent component analysis (ICA) in order to suppress the remaining noise.