Graphic printing method for New Braille Printer

Nowadays, Graphic printing becomes more and more important to the blinds. Being compared with the embossed printer, New Braille Printer (NBP) utilizes UV-curing adhesive to generate durable Braille dots with lower cost and better quality. Until now, unfortunately, NBP can´t print graphic. Thus, in this paper, a graphic printing method for NBP has been introduced which utilizes zooming-edge-detection to gain contours of printing image and then transforms contour image into a matrix which composed by 0/1 elements and the elements´ position corresponded to real printing Braille position of NBP. Then, it utilizes raster scan method to read the matrix to get the control information for controlling NBP to print graphic with dot style. The experiments show that the method can help the NBP recognize the printing image in different kinds of formats, auto-transform the printing image into a matrix mapping to the size of A4 paper and achieve graphic printing with different sizes of image onto A4 paper clearly and completely. Meanwhile, the output of the graphic printing can be identified by the blinds.