A captured image of an object is input twice using a white background and a black background, after which the opacity D and the color image X of the object are obtained to yield an object image. The processor may receive requests from a requesting component to perform a plurality of data operations, generate a plurality of packets associated with the plurality of data operations, and continuously transmit each of the plurality of packets until each of the plurality of packets are transmitted. On the basis of the result of the measurement of performance, a signal indicating, for example, that a remedial action may need to be taken is generated. The cooling tubes 8 are sandwiched between the crystal cylinder 6 and the enclosing tube 7 at both ends of the crystal cylinder 6.