Patent ID: 9626767
Date: 2017-04-18
CPC Classifications: G01B,G06T

Claim:
1. A surface normal information producing apparatus configured to produce surface normal information on a normal line to a surface of an object by using a captured image acquired by image capturing of the object, the apparatus comprising: an image acquirer configured to acquire, as the captured images, (a) multiple first images in which light source positions relative to the object are mutually different and (b) three or more second images in which polarization states are mutually different; a divider configured to perform area division of the surface of the object depending on at least one of luminance information that changes corresponding to the light source positions acquired from the first images and polarization information acquired from the second images; and a producer configured to select, for each divided area obtained by the area division, information to be used in production of the surface normal information from (c) information relating to change of the luminance information corresponding to the light source positions and (d) the polarization information to perform the production of the surface normal information.