Tetsuya Watanabe (Nat. Inst. of Special Education)
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Practical Use of Interactive Tactile Graphic Display System at a School for the Blind
Tetsuya Watanabe (Nat. Inst. of Special Education) Makoto Kobayashi (Tsukuba Univ. of Technology) Shoichiro Ono, and Keiko Yokoyama (Fukushima Prefectual School for the Blind) In this presentaion Review methods to produce tactile graphics.
Why we use tactile graphic display and what it is? Demonstrate its effective usage in education of blind students. Video clips taken in lessons. Methods to produce tactile graphics Capsule paper
Widely used in schools because of its simple production. Methods to produce tactile graphics Embosser or braille printer
Useful software is available. Methods to produce tactile graphics Vacuum former
Can produce 3-D shapes. Enduring Expensive Tangible line drawer: Raised line drawing kit
Special plastic sheet raised when scratched with a pen. Blind persons can use it by themselves. Drawbacks of these methods
Produced by sighted persons. Except for raised line drawing kit Lack of rewritability (erasability) These tactile graphics are NOT rewritable (erasable) once drawn or made. Lack of realtimeness Tactile graphic display sytem is used to solve these problems. Tactile graphic cell Tactile graphic display consists of tactile graphic cells. Piezoelectronic actuators push up and down the tactile pins. Pin diameter:1.3 mm Pin stroke:0.7 mm Interpin spacing: 3 mm Tactile graphic cell SC-5, KGS Corporation, Japan Interactive Tactile Graphic System
Consists of a three dimensional digitizer and a tactile graphic display and original progaram. Functions of the System
As a drawing tool Drawing static and blinking lines Erasing raised lines Clearing the whole screen Tactile Animation Linear Movements Rightward and Leftward Page-Flipping Animation Can be used in combination with Microsoft PowerPoint Basic Functions: Drawing and Erasing Test Use at a School for the Blind
Purpose: To evaluate the system from a practical viewpoint. whether the system can be used as a teaching tool and in what way what kind of improvements are needed In a science lesson In a gymnastics lesson In a science lesson (pre Tactile Game: Whack a Mole Tactile Game: Ping-Pong Tactual reproduction of a statue 3D to 2D Highly evaluated points
Easy to learn to draw and erase. The teacher can know whether or not the student understand what he/she has learned by having them draw it. Blinking dots & lines Easily attracted the attention. Page Flipping Animation Usable to understand the movements Students in lower grades enjoyed tactile games. Problems of the System Interdot spaces are too wide (3 mm) .
Hard to draw straight lines. Oblique lines were felt as zig-zag lines. Utilizing new technology: Ultrasonic Pen
An ultrasonic pen is used In place of a 3D digitizer Test use by a blind researcher He could write his name Summary Interactive tactile graphics system was developed and was proved to be able to allow blind persons to draw and erase tactile graphics. Usable in lessons at a school for the blind. Future direction Hardware: Improvement of tactile display needed. Software: More contents needed. Too expensive You can make MIMIZU by yourself !