Image processing apparatus for area separation of images, image processing method, and computer readable medium

摘要

An image processing apparatus includes a receiving unit that receives an image; a separating unit that separates a first area from the received image; an extracting unit that extracts a second area of a color having a predetermined relationship in the separated first area; an acquiring unit that acquires the characteristic relating to the shape of the extracted second area; a first determining unit that determines whether or not the second area is plain, on the basis of the acquired characteristic; and a second determining unit that determines, as the property of the first area, whether the first area is a continuous-tone area, a plain area, or a composite area including a continuous-tone area and a plain area, on the basis of the ratio of the second area determined to be plain to the separated first area.

主权项

1. An image processing apparatus comprising:
at least one processor which executes: a receiving unit that receives an image; a separating unit that separates a first area from the image received by the receiving unit; an extracting unit that extracts a second area of a color having a predetermined relationship in the first area separated by the separating unit; an acquiring unit that acquires the characteristic relating to a shape of the second area extracted by the extracting unit; a first determining unit that determines whether or not the second area is plain, on a basis of the characteristic acquired by the acquiring unit; and a second determining unit that determines, as the property of the first area, whether the first area is a continuous-tone area, a plain area, or a composite area including a continuous-tone area and a plain area, on a basis of a ratio of the second area determined to be plain by the first determining unit to the first area separated by the separating unit, wherein the acquiring unit acquires the characteristic relating to the shape of the second area by determining at least one difference between distances in neighboring neighboring peripheral pixels forming an outer periphery of the second area extracted by the extracting unit.