Image processing apparatus and image processing method

摘要

An image processing apparatus is an image processing apparatus which derives an angle of inclination of an image and includes: an edge angle calculation unit which calculates a plurality of edge angles corresponding to a plurality of pixels in the image by calculating, in each of the pixels, an edge angle that is an angle of an edge; a use angle identification unit which identifies one or more use angles that are each the edge angle and are each a candidate for the angle of inclination, using the edge angles and a plurality of depth values that correspond to the pixels and each indicate a depth of a corresponding one of the pixels; and an inclination angle derivation unit which derives the angle of inclination from the one or more use angles.

主权项

1. An image processing apparatus which derives an angle of inclination of an image, the image processing apparatus comprising:
a non-transitory memory device storing a program; and a hardware processor that executes the program and causes the image processing apparatus to operate as: an edge angle calculation unit configured to calculate a plurality of edge angles corresponding to a plurality of pixels in the image by calculating, in each of the pixels, an edge angle that is an angle of an edge; a use angle identification unit configured to identify one or more use angles using a plurality of depth values and the edge angles, the one or more use angles each being the edge angle and each being a candidate for the angle of inclination, the depth values corresponding to the pixels and each indicating a depth of a corresponding one of the pixels, the use angle identification unit including:
a histogram generation unit configured to generate a plurality of histograms by generating, for each depth level, a histogram of the edge angles calculated by the edge angle calculation unit, the depth level indicating a degree of the depth values; anda use angle identification processing unit configured to identify, as the one or more use angles, one or more of the edge angles which meets a predetermined condition in the histograms; and an inclination angle derivation unit configured to derive the angle of inclination from the one or more use angles.