The invention relates to an internal combustion engine comprising a fuel injector for each cylinder; a fuel injection control unit for controlling fuel injection quantity and a piston in each cylinder whose compression action causes a mixture of air and fuel to be ignited. A preferred embodiment comprises a search control unit that can determine a start and stop condition for a correlation based on a hypothesis, a searcher which includes a multiplexer that can select a subset of samples of a received sequence based on the hypothesis and start and stop conditions. Further, the weight of the food product is used in conjunction with the configuration of the cooking apparatus to increase the surface area contact between the food product and the susceptor. When focusing is adjusted, a focal length \u201cf\u201d and a distance \u201cb\u201d between a lens and the image device are calculated.