PROBLEM TO BE SOLVED: To provide a video system and an image forming method, which can easily improve space resolution only by adding an extremely simple technological element without operating a frequency of a carrier signal for survey.SOLUTION: A measurement object is excited in a direction in which space resolution is desired to be improved. When DFT is performed for complex component data obtained by orthogonal detection, an excitation frequency component is taken out, subjected to a correcting operation and added to a fundamental wave component. Thus, the space resolution can be easily improved by adding a relatively simple process.
