Dot code technology

1. Summary
Developed by the Japanese venture company Gridmark, the 2D dot code technology (grid on put) is similar to bar codes and QR codes. This technology reads the digital data from printed codes by a pen-shaped scanner.

2. Feature
The dots are minuscule enough that at first look, it only seems like an ordinary picture. When enlarged, you can see a faint patterns within the words or pictures. The infrared camera of the scanner built into the pen freads the pattern when you touch the code.

3. Composition of the dots
Grid on put is a 2 mm square area divided into 4 x 4 spaces. Within the 16 squares, the dot codes are printed. By changing the positions of dots in each area, it is possible to make over 300 trillion patterns. The camera at the tip of the speaking pen reads the dot code, the inner processor deciphers it, and the appropriate voice data plays. The above graph shows an enlarged dot code. The square area outlined in blue is one 2 mm code.

4. Printing codes
It is possible to print from normal printers. However, the dot codes require black pigment ink. Also, when using the 4 colors CMYK, please don’t use the K ink for any pictures or words covering the dot codes. That way, the code will read more smoothly. By touching the speaking pen to the area printed with dot codes, the  according voice data will play. The dot codes can be printed with color illustrations or photos to make an easy to understand textbook.

5. For use with language materials
This is an excellent technology to connect paper and voice, very useful for language teaching materials.

For details, check the gridmark home page: