Image processing apparatus for correcting color information and method therefor

摘要

According to one embodiment, there is provided an image processing apparatus including: first circuitry and second circuitry. The first circuitry sets for first color information in a first color gamut a correction quantity of a brightness defined depending on a lightness and a chroma of the first color information on a basis of a difference between a target brightness and the brightness of the first color information. The second circuitry corrects at least one of the lightness and the chroma of the first color information such that the brightness of the first color information is corrected by the correction quantity to obtain corrected color information in the first color gamut.

主权项

1. An image processing apparatus comprising:
first circuitry configured to calculate a difference between a brightness of first color information expressed in a first color gamut of a first device and a brightness of the first color information expressed in a second color gamut of a second device, the first color information including a first lightness and a first chroma, and to calculate a first correction quantity corresponding to a correction quantity of the first lightness and a second correction quantity corresponding to a correction quantity of the first chroma so as to represent the difference based on a relationship formula involving lightness, chroma and brightness; and second circuitry configured to output second color information including a second lightness and a second chroma, the second lightness corresponding to corrected lightness of the first lightness by the first correction quantity and the second chroma corresponding to corrected chroma of the first chroma by the second correction quantity, wherein the first circuitry is configured to find a portion in which values of the lightness and the chroma are equal to or lamer than values of the lightness and the chroma of the first color information in a graph representing a relationship between the lightness and the chroma capable of representing a brightness obtained by correcting the brightness of the first color information expressed in the first color gamut by a quantity depending on the difference, and to calculate the first correction quantity and the second correction quantity such that the second lightness and the second chroma correspond to a point which internally divides the portion by a given ratio.