The process of colorization involves simulating color for a monochrome or color-deficient dataset through an appropriate method. Although similar to fusion, colorization typically involves some artistic license because the color source can differ greatly in type, date, and/or resolution from the base. An example would be to use a portion of a 10m SPOT-5 multispectral image to colorize a 0.5m WorldView-1 panchromatic image. Although the resolutions differ by a factor of 20, the result can be surprisingly realistic. Another example involves simulating the blue band for SPOT-4 imagery (which lacks a blue band), which can then be used to simulate a “natural color” look when combined with the original green and red bands.