RaspiberryPi openCV with wiringPi

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My last post GPIO control for raspberry openCV is use system() function.

This post use wiringpi library.

I forgot wiringPi initialize.

If you added wiringPiSetup(), wiringPi is work.

You can download my changed code.

Backup your camcv_vid1.cpp and CMakeLists.txt files.

Extract zip files

And compile and build(cmake and make.)

RUN

If you see this error

Need a root.

So, you will typing this.

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sudo ./camcv others/csv.txt l 2000

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GPIO control for raspberry openCV

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There are many library for GPIO control.

Usually we use wiringPi.

But difficult compile wiringPi in cmake of camcv. 

Compile is ok but code does not run.

I added CmakeList.txt

CmakeList.txt

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SET(CMAKE_CXX_FLAGS "-pthread -I/usr/local/include -L/usr/local/lib -lwiringPi") include_directories(/usr/local/include/) target_link_libraries(/usr/local/lib/libwiringPi.so /usr/local/lib/libwiringPiDev.so )

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Added  camcv_vid1.cpp

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#include <wiringPi.h>

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Added main() function code

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pinMode(0, OUTPUT);    // output mode     digitalWrite(0, 0);    //output low

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Added in recognize function code

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digitalWrite(0, 1);    //output high

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But doesn't run. So I tried another method.

shell command!!

I referred digipine.com 

system() function is shell command function.

Added main() function code.

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system("gpio mode 0 out");    //ans  system("gpio write 0 0");    //ans

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GPIO 0 -> output

GPIO 0 -> low

Added in recognize function code

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// display name of the guy on the picture string box_text; if (prediction<MAX_PEOPLE) {     box_text = "Id="+people[prediction];     if (prediction == P_NATACHA) //ans         system("gpio write 0 1");    //ans } Colored by Color Scripter

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If recognized natacha, gpio 0 is high.

I referred wiringpi.com 

I use code is

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gpio mode 0 out //gpio 0 output  gpio write 0 0  //gpio 0 low  gpio write 0 1  //gpio 0 high

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[ Raspberry Pi2 ] OpenCV using Picam Final

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This posting is final.

We will face detect and recognize.

OpenCV Download

opencv 2.3.1 다운로드

If above link is error use this link

Extract file and move folder OpenCV-2.3.1/data/harrcascades to

usr/share/opencv/haarcascades

new camcv file download

camcv_vid1.cpp 보기

Editing cmakelists.txt

1. sudo nano CMakeLists.txt

remove camcv.c and add camcv_vid1.cpp

Editing camcv_vid1.cpp

1. sudo nano camcv_vid1.cpp

1. Line 59
2. ----------------------------------------------------------------------------------------------
3. #include "/home/pi/pierre/libfacerec-0.04/include/facerec.hpp"
4. =>#include "/home/pi/camcv/libfacerec/include/facerec.hpp"로 수정
5. ----------------------------------------------------------------------------------------------
6. face recognition API
7.  
8. Line 681
9. ---------------------------------------------------------------------------------------------------
10. fn_haar = "/usr/share/opencv/haarcascades/lbpcascade_frontalface.xml";
11. =>fn_haar = "/usr/share/opencv/lbpcascades/lbpcascade_frontalface.xml"; 
12. ---------------------------------------------------------------------------------------------------
13. face detect lib
14.  
15. Line 764
16. ---------------------------------------------------------------------------------------------------
17. else if (!raspipreview_create(&state.preview_parameters))
18. =>else if ( (status = raspipreview_create(&state.preview_parameters)) != MMAL_SUCCESS) 
19. ---------------------------------------------------------------------------------------------------

All editing file download

Downloading for test sample image

Download sample image

Copy to /home/pi/camcv/others/

You can see 400's image file and  1 txt file.

open csv.txt 

left ';' is image file name, right is id number.

opencv compare this image file and getting id number.

open camcv_vid1.cpp Line 65

define ID number.

go to Line 661

You can see display name.

build

1. sudo cmake .
2. sudo make

If you see below error

copy contrib.hpp file.

contrib.hpp 

contrib.hpp download

copy to /usr/include/opencv2/contrib/contrib.hpp 

RUN

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/camcv others/csv.txt l 5500

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Many image file is need long time.

If not display id name, reduce parameter

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/camcv others/csv.txt l 3000

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but, lower the recognition rate.

[ Raspberry Pi2 ] OpenCV using Picam 4

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This posting is using not still-shot but video.

copy camcv.c to RaspiVid.c 

Editing RaspiVid.c file. 

1. We  delete- all lines related to the preview component,
2. - all lines related to the encoder component.
3. - all lines related to inline command parsing and picture info…
4. We change :
5. - add the callback directly to the video_port  (line 286)
6. - create and attach the pool (to get/send message)  to the video port… (line 320)
7. - change format encoding to ENCODING_I420 in line (268) (instead of OPAQUE)

But, recommend down load raspiVid.c file

and editing Line 489

1. else if (!raspipreview_create(&state.preview_parameters))
2. => else if ( (status = raspipreview_create(&state.preview_parameters)) != MMAL_SUCCESS)

rename raspiVid.c to camcv.c

(If you download above link, you getting camcv_vid0.c )

1. mv RaspiVid.c camcv.c

All editing file download

build

RUN (using xrdp or rasberry pi x-window)

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./camcv

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If you change color or gray and frame, see Line 124 and Line 119~120.

picam FPS in Pi 1

320×240 color : FPS = 27,2

320×240 gray : FPS = 28,6

640×480 color : FPS = 8

640×480 gray : FPS = 17

picam FPS in Pi 2

320×240 color : FPS = 29.9

320×240 gray : FPS = 29.9

640×480 color : FPS = 24.3

640×480 gray : FPS = 29.9

1280x960 color : FPS=6.6

1280x960 gray : FPS=15

maybe fps limit 29.9