Returns a Pixel instance for the corresponding scanned Pixel instance of Pixel id.
The same instance is returned when called multiple times for the same Pixel.
Parameters
id: string|number
Identify which Pixel to use.
It can be either the system id as a string or the Pixel id as a number.
Returns a Pixel instance for the corresponding scanned Pixel instance of Pixel id. The same instance is returned when called multiple times for the same Pixel.