#define check_width 9
#define check_height 9
static unsigned char check_bits[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x80, 0x00, 0x41, 0x00,
   0x22, 0x00, 0x14, 0x00, 0x08, 0x00 };