Monitoring and controlling a coating operation using a thermal distribution on the workpiece

The invention relates to a method of coating a workpiece using a sprayer. In this case, the coating of the workpiece according to at least one coating parameters are made and executed during the steps of coating at least: - detecting a local thermal distribution in a working area of ​​a surface of the workpiece; and - adjusting said at least one coating parameter in dependence on the detected heat distribution. The invention also relates to an apparatus for coating a workpiece.