Interface for controlling energy application apparatus

An apparatus for processing objects, placed in a cavity, with radiofrequency (RF) energy that is resonant in the cavity, the apparatus comprising:

• a display for displaying to a user an image of at least a first portion and a second portion of an object to be processed in the cavity;
• an input unit;
• and
• at least one processor configured to:
• receive information based on input provided to the input unit;
• and cause, based on the received information, application of RF energy resonant in the cavity to the object such that a first processing result is achieved in the first portion of the object and a second processing result is achieved in the second portion of the object;
• cause application of a plurality of electromagnetic field patterns to the object in the cavity;
• determine an amount of power dissipated in the object for each of the plurality of electromagnetic field patterns;
• determine one or more values indicative of energy absorption based on the amount of power dissipated in the object for each of the plurality of electromagnetic field patterns.