Image display device and image display method

An image display device that displays a thermal image that is captured by an infrared camera and indicates temperatures of a subject by color, the image display device comprising:

• a display configured to display the thermal image;
• a storage configured to store temperature-color conversion information representing a correspondence relation between temperatures of the subject and colors of a pixel;
• an operation device configured to receive an operation of a user;
• and
• a control circuit configured to, according to the operation of the user, generate the thermal image based on the temperature-color conversion information and cause the display to display the thermal image,
• wherein, the control circuit is configured to, when a position on the thermal image is specified by the user, generate a temperature information image indicating, by a numerical value, a temperature of each pixel contained in a predetermined area including the position specified on the thermal image, and cause the display to display the temperature information image while a temperature of a pixel corresponding to the position specified is displayed at a center of the temperature information image, and
• the control circuit is configured to, when a position on the temperature information image is specified by the user, set a temperature range that has a predetermined temperature width and a center which is a temperature of a pixel corresponding to the position specified on the temperature information image, update the temperature-color conversion information based on the temperature range, regenerate the thermal image and the temperature information image based on the temperature-color conversion information updated, and cause the display to display the thermal image and the temperature information image which are regenerated.