车牌识别--S5PV210測试第二次优化

优化：

1、RGB转HSV 浮点运算改成定点运算；

2、匹配模板由图片改成C语言数组；

3、优化測试BMP车牌图片读取（两层for循环改为一层for循环）。

总体相比优化之前时间降低110ms左右。

640x480: 160ms 左右

320x240: 55ms 左右

[liujia@210]#./car test/1.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A F Q 7 8 7

Total Time: time use:158ms

[liujia@210]#./car test/2.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A 8 S 3 0 8

Total Time: time use:162ms

[liujia@210]#./car test/3.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

ÔÁ A G F 7 5 1

Total Time: time use:57ms

[liujia@210]#./car test/4.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

ÔÁ A 8 S 3 0 8

Total Time: time use:55ms

[liujia@210]#./car test/5.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ M 0 7 3 6 9

Total Time: time use:141ms

[liujia@210]#./car test/6.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A 6 Y 2 6 8

Total Time: time use:163ms

[liujia@210]#./car test/7.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

ÔÁ A 9 X 6 6 7

Total Time: time use:59ms

[liujia@210]#./car test/8.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A P 6 8 3 8

Total Time: time use:186ms

[liujia@210]#./car test/9.bmp

BMP Size:879414, Info_length:54, H:640, W:458

The Car ID IS:

ÔÁ A F N 5 5 3

Total Time: time use:167ms

[liujia@210]#./car test/10.bmp

BMP Size:1004214, Info_length:54, H:640, W:523

The Car ID IS:

Íî J 0 8 0 3 6

Total Time: time use:169ms

[liujia@210]#./car test/11.bmp

BMP Size:1035978, Info_length:54, H:665, W:519

The Car ID IS:

ËÕ B H 6 0 8 2

Total Time: time use:172ms

[liujia@210]#./car test/12.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A F Z 9 0 5

Total Time: time use:172ms

[liujia@210]#./car test/13.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

ÔÁ A A D 2 6 3

Total Time: time use:172ms

眼下影响时间的问题，已经不是浮点了。而是大量的for循环中的运算，60%的时间都使用在车牌定位中。一旦车牌定位后。后面的字符切割和匹配使用10ms左右时间。就能够完毕。

对照測试使用的笔记本I3-380cpu，虚拟机执行结果

640X480：27ms左右

320x240: 9ms左右

root@lj:/work/carid/0532# ./car test/1.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A F Q 7 8 7

Total Time: time use:27ms

root@lj:/work/carid/0532# ./car test/2.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A 8 S 3 0 8

Total Time: time use:103ms

root@lj:/work/carid/0532# ./car test/3.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

▒▒ A G F 7 5 1

Total Time: time use:9ms

root@lj:/work/carid/0532# ./car test/4.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

▒▒ A 8 S 3 0 8

Total Time: time use:9ms

root@lj:/work/carid/0532# ./car test/5.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ M 0 7 3 6 9

Total Time: time use:23ms

root@lj:/work/carid/0532# ./car test/6.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A 6 Y 2 6 8

Total Time: time use:33ms

root@lj:/work/carid/0532# ./car test/7.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

▒▒ A 9 X 6 6 7

Total Time: time use:9ms

root@lj:/work/carid/0532# ./car test/8.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A P 6 8 3 8

Total Time: time use:28ms

root@lj:/work/carid/0532# ./car test/9.bmp

BMP Size:879414, Info_length:54, H:640, W:458

The Car ID IS:

▒▒ A F N 5 5 3

Total Time: time use:25ms

root@lj:/work/carid/0532# ./car test/10.bmp

BMP Size:1004214, Info_length:54, H:640, W:523

The Car ID IS:

▒▒ J 0 8 0 3 6

Total Time: time use:27ms

root@lj:/work/carid/0532# ./car test/11.bmp

BMP Size:1035978, Info_length:54, H:665, W:519

The Car ID IS:

▒▒ B H 6 0 8 2

Total Time: time use:27ms

root@lj:/work/carid/0532# ./car test/12.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A F Z 9 0 5

Total Time: time use:27ms

root@lj:/work/carid/0532# ./car test/13.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

▒▒ A A D 2 6 3

Total Time: time use:25ms

对照ME865（OMAP4430）

640x480:130ms左右

320x240：50ms左右

root@edison:/data # ./car /sdcard/test/1.bmp

./car /sdcard/test/1.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A F Q 7 8 7

Total Time: time use:122ms

root@edison:/data # ./car /sdcard/test/2.bmp

./car /sdcard/test/2.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A 8 S 3 0 8

Total Time: time use:125ms

root@edison:/data # ./car /sdcard/test/3.bmp

./car /sdcard/test/3.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

粤 A G F 7 5 1

Total Time: time use:50ms

root@edison:/data # ./car /sdcard/test/4.bmp

./car /sdcard/test/4.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

粤 A 8 S 3 0 8

Total Time: time use:42ms

root@edison:/data # ./car /sdcard/test/5.bmp

./car /sdcard/test/5.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 M 0 7 3 6 9

Total Time: time use:94ms

root@edison:/data # ./car /sdcard/test/6.bmp

./car /sdcard/test/6.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A 6 Y 2 6 8

Total Time: time use:134ms

root@edison:/data # ./car /sdcard/test/7.bmp

./car /sdcard/test/7.bmp

BMP Size:230454, Info_length:54, H:320, W:240

The Car ID IS:

粤 A 9 X 6 6 7

Total Time: time use:51ms

root@edison:/data # ./car /sdcard/test/8.bmp

./car /sdcard/test/8.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A P 6 8 3 8

Total Time: time use:132ms

root@edison:/data # ./car /sdcard/test/9.bmp

./car /sdcard/test/9.bmp

BMP Size:879414, Info_length:54, H:640, W:458

The Car ID IS:

粤 A F N 5 5 3

Total Time: time use:124ms

root@edison:/data # ./car /sdcard/test/10.bmp

./car /sdcard/test/10.bmp

BMP Size:1004214, Info_length:54, H:640, W:523

The Car ID IS:

皖 J 0 8 0 3 6

Total Time: time use:171ms

root@edison:/data # ./car /sdcard/test/11.bmp

./car /sdcard/test/11.bmp

BMP Size:1035978, Info_length:54, H:665, W:519

The Car ID IS:

苏 B H 6 0 8 2

Total Time: time use:207ms

root@edison:/data # ./car /sdcard/test/12.bmp

./car /sdcard/test/12.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A F Z 9 0 5

Total Time: time use:204ms

root@edison:/data # ./car /sdcard/test/13.bmp

./car /sdcard/test/13.bmp

BMP Size:921654, Info_length:54, H:640, W:480

The Car ID IS:

粤 A A D 2 6 3

Total Time: time use:138ms

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