A two and three dimensional display based on up conversion of near infrared light to the visible. According to the data amount of the selected images and the determined residual quantity of the battery, it is determined whether it is possible or not to transmit all of image data. Wireline data, including a borehole image, is obtained for a cored interval corresponding to the core and processed into an interpretable borehole image. The control signal is supplied to a DAC and a Doppler frequency detector.