An image capturing device comprising: measurement means for generating a measurement result of unevenness existing on a surface of an object; calculation means for generating, on a basis of the measurement result, an inclination distribution representing a relationship between inclination angles at a number of points on the surface of the object and their frequencies, and calculating a first inclination statistic value that is an inclination angle that halves an area of the inclination distribution into two parts, and a second inclination statistic value that is an inclination angle that represents a right tail of the inclination distribution; determination means for determining an irradiation angle range for irradiating the object by illumination means, on a basis of the first inclination statistic value and the second inclination statistic value calculated by the calculation means; said illumination means configured for irradiating the object with the determined irradiation angle range; and capturing means for capturing reflected light from the object, which is being irradiated by the illumination means with the determined irradiation angle range, as a reflection image, wherein the illumination means and the capturing means are arranged to have a common optical axis immediately above the object in the vertical direction; wherein the illumination means has a ring-type or dome-type shape; and wherein the inclination angle at a point on the surface of the object is an angle formed between a normal line at the point and a line at the point that is in parallel with an optical axis of the illumination means and an optical axis of the capturing means. measurement means for generating a measurement result of unevenness existing on a surface of an object; calculation means for generating, on a basis of the measurement result, an inclination distribution representing a relationship between inclination angles at a number of points on the surface of the object and their frequencies, and calculating a first inclination statistic value that is an inclination angle that halves an area of the inclination distribution into two parts, and a second inclination statistic value that is an inclination angle that represents a right tail of the inclination distribution; determination means for determining an irradiation angle range for irradiating the object by illumination means, on a basis of the first inclination statistic value and the second inclination statistic value calculated by the calculation means; said illumination means configured for irradiating the object with the determined irradiation angle range; and capturing means for capturing reflected light from the object, which is being irradiated by the illumination means with the determined irradiation angle range, as a reflection image, wherein the illumination means and the capturing means are arranged to have a common optical axis immediately above the object in the vertical direction; wherein the illumination means has a ring-type or dome-type shape; and wherein the inclination angle at a point on the surface of the object is an angle formed between a normal line at the point and a line at the point that is in parallel with an optical axis of the illumination means and an optical axis of the capturing means.