New blind graphic printing technology based on New Braille Printer

Nowadays, New Blind graphic become more and more important for the blind because graphic contains more information than words. As a new Braille printing tool, New Braille Printer (NBP) has overcome many shortcomings of traditional Braille printer. Unfortunately, the NBP can´t print graphic at the present. Thus, in this paper, a graphic printing method for NBP has been introduced that zooming-edge detection is utilized to gain contours of printing image ,and then, the contour images are transformed into a matrix which composed by 0/1 elements and the elements´ position correspond to real printing Braille position of NBP, then, raster scan method is utilized to read the matrix to get the control information for controlling NBP to print graphic. The experiments show that this kind of new 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 by different sizes of image onto A4 paper clearly and completely. The output of the graphic printing can be identified by the blind.