// possible data for imaging
// hexadecimal digits
protected final static char hd[] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
// number of chars in a full row of pixel data
protected final static int charsPerRow = 12*6;