Projection type display device, projection display method, and projection display program

A projection display method for projecting image light obtained by modulating light emitted from a light source on the basis of image data onto a windshield of a vehicle, the method comprising:

• detecting a line of sight of an occupant of the vehicle;
• acquiring measurement data on shape of the windshield of a predetermined region including a point that intersects the line of sight, in a projectable range where the image light is projectable onto the windshield;
• generating, on the basis of the measurement data and a direction of the line of sight, correction data for correcting distortion of an image in a state where the image based on the image light projected onto the region where the measurement data is acquired is viewed in the direction;
• and
• correcting the image data using the correction data.

A non-transitory computer readable recording medium storing a projection display program that causes a computer to execute a projection display method for projecting image light obtained by modulating light emitted from a light source on the basis of image data onto a windshield of a vehicle, the method comprising:

• detecting a line of sight of an occupant of the vehicle;
• acquiring measurement data on shape of the windshield of a predetermined region including a point that intersects the line of sight, in a projectable range where the image light is projectable onto the windshield;
• generating, on the basis of the measurement data and a direction of the line of sight, correction data for correcting distortion of an image in a state where the image based on the image light projected onto the region where the measurement data is acquired is viewed in the direction;
• and
• correcting the image data using the correction data.