Image projection apparatus

An image projection apparatus comprising:

• a detector that detects a first region emitting non-visible light;
• a projector that projects a visible-light image onto a second region including the first region detected by the detector;
• an operating part for an operator performing various settings;
• and
• a controller configured to generate the visible-light image so as to vary colors of pixels of the visible-light image in a stepwise manner depending on emission intensities of the non-visible light at positions corresponding to the pixels within the first region, wherein:
• the controller is configured to control the projector according to an action mode including a plurality of projection modes switchable in accordance with an operation on the operating part,
• the plurality of projection modes includes at least one of a first projection mode and a second projection mode, and a third projection mode,
• the first projection mode is a mode in which saturations of the pixels of the visible-light image are varied continuously depending on the emission intensities of the non-visible light at the positions corresponding to the pixels within the first region,
• the second projection mode is a mode in which saturations of the pixels of the visible-light image are varied in a stepwise manner depending on the emission intensities of the non-visible light at the positions corresponding to the pixels within the first region, and
• the third projection mode is a mode in which hues of the pixels of the visible-light image are varied depending on the emission intensities of the non-visible light at the positions corresponding to the pixel within the first region.