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US 8,135,215 B2Granted
Correction of color balance of face images
AssigneeFUJIFILM Corporation
InventorHirokazu Kameyama
Life of this patent
Estimating the term…
Abstract
On the basis of image data representing the area of a face image contained in an image represented by applied image data, a color correction value calculating circuit calculates a color correction value and a color image probability calculating circuit calculates the probability that the area of the face image is a color image. A color correction value adjusting circuit then adjusts the color correction value based upon the probability that the area of the face image is a color image. The adjusted color correction value is used in correction processing in an image correcting circuit.
Claims11
An image correction apparatus comprising:
- a representative color information calculating device which calculates color information representative of a specific image contained in an image represented by applied image data;
- a target color information setting device which sets target color information;
- a target color information modifying device which modifies the target color information, while maintaining a tint that is based upon the target color information that has been set by said target color information setting circuit, in such a manner that target brightness information calculated based upon the target color information that has been set will be the same as representative brightness information of the specific image calculated based upon the representative color information of the specific image that has been calculated by said representative color information calculating circuit;
- and
- an image data correcting circuit which corrects at least data representing the specific image in the applied image data in such a manner that the representative color information of the specific image that has been calculated by said representative color information calculating circuit will have the modified target color information obtained as a result of the modification by said target color information modifying circuit;
- said target color information modifying device adopts as the modified target color information a point of intersection in color space between a line, which passes through the origin or a maximum point comprising a maximum point of a red color, a maximum point of a green color and a maximum point of a blue color of an RGB color space, and which also passes through a point stipulated by the target color information, and a constant-brightness plane stipulated by the representative color information of the specific image.
3 more elements
A tangible, non-transitory computer readable medium embodied with a program for causing a computer to execute a method of image correction, the method comprising:
- representative color information calculating processing for calculating color information representative of a specific image contained in an image represented by applied image data;
- target color information setting processing for setting target color information;
- target color information modifying processing for modifying the target color information, while maintaining a tint that is based upon the target color information that has been set by said target color information setting processing, in such a manner that target brightness information calculated based upon the target color information that has been set will be the same as representative brightness information of the specific image calculated based upon the representative color information of the specific image that has been calculated by said representative color information calculating processing;
- image data correction processing for correcting at least data representing the specific image in the applied image data in such a manner that the representative color information of the specific image that has been calculated by said representative color information calculating processing will have the modified target color information obtained as a result of the modification by said target color information modifying processing;
- and
- displaying the corrected image on a display;
- wherein said target color information modifying processing adopts as the modified target color information a point of intersection in color space between a line, which passes through the origin or a maximum point comprising a maximum point of a red color, a maximum point of a green color, and a maximum point of a blue color of an RGB color space, and which also passes through a point stipulated by the target color information, and a constant-brightness plane stipulated by the representative color information of the specific image.
4 more elements
An image correction apparatus comprising:
- a representative color information calculating device which calculates color information representative of a specific image contained in an image represented by applied image data;
- a target color information setting device which sets target color information;
- a target color information modifying device which modifies the target color information, while maintaining a tint that is based upon the target color information that has been set by said target color information setting circuit, in such a manner that target brightness information calculated based upon the target color information that has been set will be the same as representative brightness information of the specific image calculated based upon the representative color information of the specific image that has been calculated by said representative color information calculating circuit;
- and
- an image data correcting circuit which corrects at least data representing the specific image in the applied image data in such a manner that the representative color information of the specific image that has been calculated by said representative color information calculating circuit will have the modified target color information obtained as a result of the modification by said target color information modifying circuit,
- wherein said color target color information modifying device adopts as the modified target color information a point of intersection in color space between a line, which passes through the origin or a maximum point and a point stipulated by the target color information, and a constant-brightness plane stipulated by the representative color information of the specific image, and
- wherein the constant brightness plane is preset prior to image correction.
4 more elements
Dependencies are inferred from the claim text.