Interactive whiteboards and programs

An interactive whiteboard, comprising:

• a coordinate detection unit configured to detect, as two-dimensional coordinates on a display plane, a contact position of an input object with reference to the display plane or an operating position of the input object with reference to a detection plane set in front side of the display plane;
• an image-capturing unit configured to capture, as a color image, an image of a vicinity of at least a region where two-dimensional coordinates are detected, wherein a range where the coordinate detector can detect the two-dimensional coordinates is set as an imageable range;
• a display light correction value calculation unit configured to calculate a display light correction value to correct a variation in image color that is caused by light addition to an image of the input object, the light being from the display plane in a vicinity of the coordinates of the input object detected by the coordinate detection unit, the calculation being performed on a basis of a display color of the display plane in the vicinity of the detected coordinates;
• a background removal unit configured to extract an image of the input object only from the color image captured by the image-capturing unit;
• a color correction unit configured to correct color information of the image of the input object extracted by the background removal unit with the display light correction value;
• a color identification unit configured to identify a color of the image of the input object subjected to color correction by the color correction unit;
• and
• a display control unit configured to draw an object having a color identified by the color identification unit and a predetermined size at the detected coordinates of the display plane.