Patent ID: 7556604

Claim:
A cognitive capacity measurement device comprising: an image display unit that has a function to display to a subject a degraded image that is an image in which degradation of the data for recognizing a significant photographic object has been caused by conducting a specified process on an original image having the object; a receiving unit to receive from the subject an input that the photographic object has been recognized, and to output reception signals; a recognition time calculator that receives the reception signals from the receiving unit and calculates a recognition time period, which is a time period the subject requires to recognize the object; a challenge level data memory unit that stores challenge level data, which is data related to a predetermined challenge level of the degraded image in conjunction with recognition of the photographic object; a cognitive capacity calculator that conducts specified operations using the recognition time period calculated by the recognition time calculator and the challenge level data stored in the challenge level data memory unit, and calculates a cognitive capacity score, which is an index that indicates the cognitive capacity of each subject; and an output unit for outputting the cognitive capacity scores wherein the image display unit also displays the original image to the subject, and the recognition time calculator calculates a recognition time period by subtracting an original image required time period, which is the time required after the image display unit displays the corresponding original image until the receiving unit receives the input that the subject has recognized the photographic object, from the degraded image required time period, which is the time required after the image display unit displays the degraded image until the receiving unit receives the input that the subject has recognized the photographic object.