First (left) and one-hour averaged (right) images with 400 × 400 pixels and an image scale of 28 km pixel^-1 taken from a CO⁵BOLD time series of solar granulation. Because of the Gaussian kernels (in the insert lower right corner) of 128 × 128 pixels used as sampling windows, the original image size was reduced by 128 pixels. The white squares mark the region with a size of 273 × 273 pixels that remains after the LCT computation.