Patent ID: 8878943

Claim:
A measurement method for measuring a theoretical estimated value of a bokeh amount of an image that would be obtained by imaging a motion blur measurement chart by a camera with its image stabilization function being OFF, the motion blur measurement chart including a plurality of color area, the measurement method comprising: calculating a theoretical motion blur amount for each of a plurality of shutter speed values, which can be set on the camera based on the value of a focal length set on the camera upon imaging of the motion blur measurement chart; acquiring a plurality of static state images obtained by imaging the motion blur measurement chart a plurality of times for each of the plurality of shutter speed values, with the camera being static; measuring, for each of the plurality of shutter speed values, a bokeh amount at the boundary between different color areas in each of the plurality of static state images that have been acquired, as a bokeh offset amount; and calculating, for each of the plurality of shutter speed values, an estimated comprehensive bokeh amount represented as the square root of the sum of square of the bokeh offset amount and square of the theoretical motion blur amount.