Image processing apparatus, region determining method, and computer-readable, non-transitory medium

摘要

Provided are an image processing apparatus, a region determining method and a computer-readable, non-transitory medium that can appropriately determine a cutting off region from a read image. The image processing apparatus includes an edge pixel extractor for extracting edge pixels from an input image, a region detector for detecting a subject region surrounded by connected edge pixels among the edge pixels, a straight line detector for detecting a plurality of straight lines within the subject region, a rectangle region detector for detecting a rectangle region formed of four straight lines where two straight lines each are substantially at right angles to each other among the plurality of straight lines, and a region determination module for determining the rectangle region as a cutting off region from the input image when the rectangle region and the subject region are substantially the same.

主权项

1. An image processing apparatus comprising:
an edge pixel extraction circuit for extracting edge pixels from an input image; a region detection circuit for detecting a subject region surrounded by connected edge pixels among the edge pixels; a straight line detection circuit for detecting a plurality of straight lines within the subject region; a rectangle region detection circuit for detecting a rectangle region formed of four straight lines in which two sets of two straight lines are substantially at right angles to each other among the plurality of straight lines; and a region determination circuit for determining whether the rectangle region and the subject region are substantially the same based on sizes or shapes of the rectangle region and the subject region, and determining the rectangle region as a cutting off region from the input image when the rectangle region and the subject region are substantially the same.