PROBLEM TO BE SOLVED: To provide an image projection device that properly projects the gradation of a monochrome medical image according to a screen using the image projection device and its surrounding viewing environment.SOLUTION: The image projection device includes means that measures a distance between the image projection device and a screen, maximum/minimum brightness measurement means, and storage means for a plurality of LUTs, and also includes means that selects an LUT for gradation correction according to an acquired environmental condition.COPYRIGHT: (C)2015,JPO&INPIT【課題】画像投写装置を使用するスクリーン、および周辺の視聴環境に応じて、モノクロ医用画像の階調を適切に投写する画像投写装置を提供する。【解決手段】画像投写装置とスクリーン間距離を計測する手段と、最大・最小輝度計測手段と、複数のLUTの記憶手段を備え、取得した環境条件により、階調補正のためのLUTを選択する手段を備える。【選択図】図2
