Projection image display apparatus and color correction method for the same

A projection image display apparatus comprising:

• a projection unit configured to project an image on a projection surface;
• a designation unit configured to designate a position of the image projected on the projection surface by the projection unit;
• a holding unit configured to hold a plurality of types of white balance adjustment color data with respect to colors of said plurality of projection surfaces on which the projection unit is configured to project the image;
• a projection control unit configured to cause the projection unit to simultaneously project, onto the projection surface, patterns having a plurality of colors based on said plurality of types of white balance adjustment color data held in the holding unit, upon dividing the patterns into areas configured to be selected for each pattern;
• a selection control unit configured to cause the designation unit to select a pattern which is whitest from the patterns having said plurality of colors projected on the projection surface, by a designation operation;
• a color data acquiring unit configured to, when a given pattern is selected from the patterns having said plurality of colors projected on the projection surface by the designation operation of the designation unit, acquire color data corresponding to the selected pattern from said plurality of types of white balance adjustment color data held in the holding unit;
• and
• a color correction unit configured to perform color correction of an image to be projected on the projection surface by the projection unit on the basis of the color data obtained by the color data acquiring unit.