I found in many Android devices that the "real array size", which is the actual pixel count of the camera sensor, is lower than the 4:3 Max picture the user can take. For example: Sensor Array = 1616 \* 1232 = 1.99 MP, and Camera Application can take a 5 MP Picture. 

Can we say that in this case the sensor is "extrapolated"? or "boosted"? or how to name this when the picture taken is different in max megapixels taken with sensor array size?