arm-linux-gcc 4.5.1（FriendlyARM）
軟浮點運行結果：
root@lj:/workspace/carid# arm-linux-gcc car.c -o softcar -lm -static
640x480BMP位圖需要大概380ms
320x140BMP位圖需要大概140ms
O3優化後性能提升一倍多
root@lj:/workspace/carid# arm-linux-gcc car.c -o softcar -lm -static -O3
640x480BMP位圖需要大概175ms
320x140BMP位圖需要大概60ms
沒有優化測試：
root@edison:/data # ./softcar /sdcard/test/1.bmp
./softcar /sdcard/test/1.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A F Q 7 8 7
time 375ms
root@edison:/data # ./softcar /sdcard/test/2.bmp
./softcar /sdcard/test/2.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A 8 S 3 0 8
time 382ms
root@edison:/data # ./softcar /sdcard/test/3.bmp
./softcar /sdcard/test/3.bmp
BMP Size IS:230454
W:320 H:240
The Car ID IS:
粵 A G F 7 5 1
time 140ms
root@edison:/data # ./softcar /sdcard/test/4.bmp
./softcar /sdcard/test/4.bmp
BMP Size IS:230454
W:320 H:240
The Car ID IS:
粵 A 8 S 3 0 8
time 145ms
root@edison:/data # ./softcar /sdcard/test/5.bmp
./softcar /sdcard/test/5.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 M 0 7 3 6 9
time 342ms
root@edison:/data # ./softcar /sdcard/test/6.bmp
./softcar /sdcard/test/6.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A 6 Y 2 6 8
time 372ms
root@edison:/data # ./softcar /sdcard/test/7.bmp
./softcar /sdcard/test/7.bmp
BMP Size IS:230454
W:320 H:240
The Car ID IS:
粵 A 9 X 6 6 7
time 137ms
root@edison:/data # ./softcar /sdcard/test/8.bmp
./softcar /sdcard/test/8.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A P 6 8 3 8
time 422ms
root@edison:/data # ./softcar /sdcard/test/9.bmp
./softcar /sdcard/test/9.bmp
BMP Size IS:879414
W:640 H:458
The Car ID IS:
粵 A F N 5 5 3
time 378ms
root@edison:/data # ./softcar /sdcard/test/10.bmp
./softcar /sdcard/test/10.bmp
BMP Size IS:1004214
W:640 H:523
The Car ID IS:
皖 J 0 8 0 3 6
time 397ms
root@edison:/data # ./softcar /sdcard/test/11.bmp
./softcar /sdcard/test/11.bmp
BMP Size IS:1035978
W:665 H:519
The Car ID IS:
蘇 B H 6 0 8 2
time 393ms
root@edison:/data # ./softcar /sdcard/test/12.bmp
./softcar /sdcard/test/12.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A F Z 9 0 5
time 380ms
root@edison:/data # ./softcar /sdcard/test/13.bmp
./softcar /sdcard/test/13.bmp
BMP Size IS:921654
W:640 H:480
The Car ID IS:
粵 A A D 2 6 3
time 391ms
root@edison:/data #O3優化後測試結果：
root@edison:/data # ./softcar /sdcard/test/1.bmp
./softcar /sdcard/test/1.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A F Q 7 8 7
time 165ms
root@edison:/data # ./softcar /sdcard/test/2.bmp
./softcar /sdcard/test/2.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A 8 S 3 0 8
time 173ms
root@edison:/data # ./softcar /sdcard/test/3.bmp
./softcar /sdcard/test/3.bmp
BMP Size is:230454
W:320 H:240
The Car ID IS:
粵 A G F 7 5 1
time 62ms
root@edison:/data # ./softcar /sdcard/test/4.bmp
./softcar /sdcard/test/4.bmp
BMP Size is:230454
W:320 H:240
The Car ID IS:
粵 A 8 S 3 0 8
time 61ms
root@edison:/data # ./softcar /sdcard/test/5.bmp
./softcar /sdcard/test/5.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 M 0 7 3 6 9
time 152ms
root@edison:/data # ./softcar /sdcard/test/6.bmp
./softcar /sdcard/test/6.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A 6 Y 2 6 8
time 169ms
root@edison:/data # ./softcar /sdcard/test/7.bmp
./softcar /sdcard/test/7.bmp
BMP Size is:230454
W:320 H:240
The Car ID IS:
粵 A 9 X 6 6 7
time 59ms
root@edison:/data # ./softcar /sdcard/test/8.bmp
./softcar /sdcard/test/8.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A P 6 8 3 8
time 179ms
root@edison:/data # ./softcar /sdcard/test/9.bmp
./softcar /sdcard/test/9.bmp
BMP Size is:879414
W:640 H:458
The Car ID IS:
粵 A F N 5 5 3
time 179ms
root@edison:/data # ./softcar /sdcard/test/10.bmp
./softcar /sdcard/test/10.bmp
BMP Size is:1004214
W:640 H:523
The Car ID IS:
皖 J 0 8 0 3 6
time 180ms
root@edison:/data # ./softcar /sdcard/test/11.bmp
./softcar /sdcard/test/11.bmp
BMP Size is:1035978
W:665 H:519
The Car ID IS:
蘇 B H 6 0 8 2
time 172ms
root@edison:/data # ./softcar /sdcard/test/12.bmp
./softcar /sdcard/test/12.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A F Z 9 0 5
time 175ms
root@edison:/data # ./softcar /sdcard/test/13.bmp
./softcar /sdcard/test/13.bmp
BMP Size is:921654
W:640 H:480
The Car ID IS:
粵 A A D 2 6 3
time 174ms如果做好優化，估計再S5PV210上能夠在100ms以內處理單張車牌。
代碼稍後提供