PROBLEM TO BE SOLVED: To provide an apparatus which automatically sets a lookup table suitable to each image according to a color or fluorescent photographing mode.SOLUTION: In step S1, a photographing mode is selected, and in step S2, photographing is performed. A fundus image is stored in a frame memory in step S3, and a lookup table is set according to the photographing mode selected in the step S1 in step S4. Gradation conversion is performed through the lookup table set in the step S4 in step S5. In step S6, data gradation-converted in the step S5 is converted to a set file format. In step S7, the data converted to the file format in the step S6 is recorded into a storage medium. In step S8, the data gradation-converted in the step S5 is transferred to a data display memory, D/A-converted, and displayed on a television monitor.
