| 摘要 |
PROBLEM TO BE SOLVED: To make a stroke image easily visible even when a writing color and a background color of the stroke image are similar to each other without changing the writing color while preventing a color and the background color of the stroke image from becoming the same color.SOLUTION: An electronic blackboard 2 includes a display 3, an electronic pen 4, a coordinate detection part 22, an event assigning part 25, and a stroke processing part 32, and further includes: a writing color storage part 32a that stores a writing color of a stroke image; a frame memory 37a that stores a background color corresponding to coordinate information on the stroke image; and a contour image drawing part 32d that draws a contour image showing the contour of the stroke image on the basis of the writing color of the stroke image and the background color corresponding to the coordinate information on the stroke image.SELECTED DRAWING: Figure 5 |
