Image processing device, imaging device, image processing method, and program

Abstract

The number of light sources of original image data and the types of light source are determined (S11). A reference white balance gain which is set for each light source type of the original image data is acquired (S12). An influence rate of each light source type is acquired for each pixel of the original image data and a mixture ratio of the reference white balance gains is acquired on the basis of the influence rate (S13). The reference white balance gains and the mixture ratio are stored in a storage medium so as to be associated with the original image data (S14). It is possible to acquire the white balance gain for each pixel required for multi-area white balance processing for the original image data from the reference white balance gains and the mixture ratio stored in the storage medium subsequently.

What is claimed is: 
     
         1 . An image processing device comprising:
 a processed data acquisition unit that acquires original image data, a reference white balance gain which is set for each light source type of the original image data, and a mixture ratio of the reference white balance gains set for each pixel of the original image data from a storage medium; and   a gain calculation unit that calculates an application white balance gain for each pixel of the original image data from the reference white balance gains according to the mixture ratio.   
     
     
         2 . The image processing device according to  claim 1 ,
 wherein the reference white balance gains acquired by the processed data acquisition unit include a reference white balance gain for flash light which is set in a case in which the light source type is flash light and a reference white balance gain for environmental light which is set in a case in which the light source type is environmental light,   the mixture ratio acquired by the processed data acquisition unit is a mixture ratio of the reference white balance gain for flash light and the reference white balance gain for environmental light which are set for each pixel of the original image data, and   the gain calculation unit calculates the application white balance gain for each pixel of the original image data from the reference white balance gain for flash light and the reference white balance gain for environmental light according to the mixture ratio.   
     
     
         3 . The image processing device according to  claim 1 , further comprising:
 a setting mode acquisition unit that acquires information about a white balance setting mode when the original image data is acquired; and   a processing mode acquisition unit that acquires information about a white balance processing mode for the original image data,   wherein the gain calculation unit calculates the application white balance gain on the basis of the reference white balance gain acquired from the storage medium in a case in which the white balance processing mode is determined to be the same as the white balance setting mode on the basis of the information about the white balance setting mode and the information about the white balance processing mode, acquires the reference white balance gain which is set on the basis of the white balance processing mode in a case in which the white balance processing mode is determined to be different from the white balance setting mode, and calculates the application white balance gain on the basis of the reference white balance gain.   
     
     
         4 . The image processing device according to  claim 1 , further comprising:
 a light source type designation unit that receives a light source type designated by a user; and   a designated gain acquisition unit that acquires a reference white balance gain set for the light source type designated by the user which is received by the light source type designation unit,   wherein the gain calculation unit replaces at least some of the reference white balance gains set for each light source type of the original image data with the reference white balance gain acquired by the designated gain acquisition unit and calculates the application white balance gain according to the mixture ratio.   
     
     
         5 . The image processing device according to  claim 1 , further comprising:
 a white balance processing unit that applies the application white balance gain to the original image data to acquire white-balance-adjusted image data.   
     
     
         6 . The image processing device according to  claim 5 , further comprising:
 a display control unit; and   a display unit that is controlled by the display control unit,   wherein the display control unit displays an image based on the white-balance-adjusted image data on the display unit.   
     
     
         7 . The image processing device according to  claim 6 ,
 wherein the display control unit is connected to an operating unit that is operated by the user,   the display control unit displays a light source display portion indicating the light source type of the original image data on the display unit and displays a plurality of light source display portions which are provided for each light source type on the display unit in a case in which there are a plurality of light source types in the original image data, and   in a case in which the plurality of light source display portions are displayed on the display unit, when the user operates the operating unit to designate any one of the plurality of light source display portions, the display control unit displays a portion of or the entire image displayed on the display unit so as to be highlighted according to an influence rate of a light source corresponding to the light source display portion designated through the operating unit.   
     
     
         8 . The image processing device according to  claim 7 ,
 wherein the display control unit displays a pixel, which is more affected by the light source corresponding to the light source display portion that is designated by the user through the operating unit than by other types of light sources among the light sources of the original image data, among pixels of the image on the display unit so as to be highlighted.   
     
     
         9 . The image processing device according to  claim 7 ,
 wherein the display control unit displays a pixel, on which the influence rate of the light source corresponding to the light source display portion that is designated by the user through the operating unit is higher than a first rate, among the pixels of the image on the display unit so as to be highlighted.   
     
     
         10 . The image processing device according to  claim 6 , further comprising:
 a white balance adjustment unit that adjusts a white balance of the image,   wherein the display control unit is connected to an operating unit that is operated by the user,   the display control unit displays a light source display portion indicating the light source type of the original image data on the display unit and displays a plurality of light source display portions which are provided for each light source type on the display unit in a case in which there are a plurality of light source types in the original image data,   in a case in which the plurality of light source display portions are displayed on the display unit, when the user operates the operating unit to designate any one of the plurality of light source display portions, the display control unit displays a change display portion for receiving a change in the white balance based on the light source corresponding to the light source display portion which is designated through the operating unit on the display unit,   the display control unit receives the change in the white balance of the image through the change display portion in response to an operation of the user through the operating unit,   when the display control unit receives the change in the white balance, the white balance adjustment unit adjusts the white balance of the image and reflects the change in the image, and   the display control unit displays the image of which the white balance has been adjusted by the white balance adjustment unit on the display unit.   
     
     
         11 . The image processing device according to  claim 6 , further comprising:
 a white balance adjustment unit that adjusts a white balance of the image,   wherein the display control unit is connected to an operating unit that is operated by the user,   the display control unit displays a light source display portion indicating the light source type of the original image data on the display unit and displays a plurality of light source display portions which are provided for each light source type on the display unit in a case in which there are a plurality of light source types in the original image data,   in a case in which the plurality of light source display portions are displayed on the display unit, when the user operates the operating unit to designate any one of the plurality of light source display portions, the display control unit displays a change display portion for receiving a change in an influence rate of the light source corresponding to the light source display portion which is designated through the operating unit in the image on the display unit,   the display control unit receives an amount of change in the influence rate in the image through the change display portion in response to an operation of the user through the operating unit,   the white balance adjustment unit adjusts the white balance of the image and reflects the amount of change in the influence rate which has been received by the display control unit through the change display portion in the image, and   the display control unit displays the image of which the white balance has been adjusted by the white balance adjustment unit on the display unit.