Raspberry Pi - OpenCV with Picam (2)

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2. Make a camcv

2-1 Copy to another directory

cd

mkdir camcv

cd camcv

cp -r /opt/vc/userland/host_applications/linux/apps/raspicam/* .


2-2 Make a camcv file

raspistill change to camcv

mv raspistill.c camcv.c

If you typing command ls, you can see camcv.c file instead of raspistill.c file.


2-3 change  cmakelists.txt

sudo nano cmakelists.txt

Clear all and copy and paste this text.
-------------------------------------------------cmakelists.txt-------------------------------------------------------

1. cmake_minimum_required(VERSION 2.8)
2.  project(camcv)
3.  SET(COMPILE_DEFINITIONS -Werror)
5. include_directories(/opt/vc/userland/host_applications/linux/libs/bcm_host/include)
6.  include_directories(/opt/vc/userland/interface/vcos)
7.  include_directories(/opt/vc/userland)
8.  include_directories(/opt/vc/userland/interface/vcos/pthreads)
9.  include_directories(/opt/vc/userland/interface/vmcs_host/linux)
10.  include_directories(/opt/vc/userland/interface/khronos/include)
11.  include_directories(/opt/vc/userland/interface/khronos/common)
12.  include_directories(/home/pi/camcv/)
13.  include_directories(/home/pi/camcv/gl_scenes/)
14.  include_directories(/home/pi/camcv/libfacerec/include/)
15. add_executable(camcv RaspiCamControl.c RaspiCLI.c RaspiPreview.c camcv.c RaspiTex.c RaspiTexUtil.c gl_scenes/teapot.c gl_scenes/models.c gl_scenes/square.c gl_scenes/mirror.c gl_scenes/sobel.c gl_scenes/yuv.c tga.c )
16. target_link_libraries(camcv /opt/vc/lib/libmmal_core.so /opt/vc/lib/libmmal_util.so /opt/vc/lib/libmmal_vc_client.so /opt/vc/lib/libvcos.so /opt/vc/lib/libbcm_host.so /opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so )

----------------------------------------------------------------------------------------------------------------------

ADD------------------------------------------------------------------------------------------

If you can see below error, modify target_link_libaries in cmakelists.txt!!

/usr/bin/ld: CMakeFiles/camcv.dir/camcv.c.o: undefined reference to symbol 'sem_post@@GLIBC_2.4'
//lib/arm-linux-gnueabihf/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: ld returned 1 exit status
CMakeFiles/camcv.dir/build.make:392: recipe for target 'camcv' failed
make[2]: *** [camcv] Error 1
CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/camcv.dir/all' failed
make[1]: *** [CMakeFiles/camcv.dir/all] Error 2
Makefile:72: recipe for target 'all' failed
make: *** [all] Error 2

1. target_link_libraries(camcv /opt/vc/lib/libmmal_core.so /opt/vc/lib/libmmal_util.so /opt/vc/lib/libmmal_vc_client.so/opt/vc/lib/libvcos.so /opt/vc/lib/libbcm_host.so /opt/vc/lib/libGLESv2.so /opt/vc/lib/libEGL.so libpthread.so libm.so)

----------------------------------------------------------------------------------------------

If you installed samba, can use easy wordpad

save and exit.

2-4 Cmake

cmake .

2-5 Make

make

try to take a picture using camcv command.

./camcv -t 1000



PS. If make a mistake in cmakelists.txt, pi make a error. When error you retry!!


2-6(optional) Delete unused code.

Think RPI  recomend delete to below delete list.

sudo nano camcv.c   (or using word pad)

---------------------------------------------------Delete list----------------------------------------------------------

static void dump_status(RASPISTILL_STATE *state)

static int parse_cmdline(int argc, const char **argv, RASPISTILL_STATE *state)

static void display_valid_parameters(char *app_name)

static MMAL_STATUS_T add_exif_tag(RASPISTILL_STATE *state, const char *exif_tag)

static void add_exif_tags(RASPISTILL_STATE *state)

static void store_exif_tag(RASPISTILL_STATE *state, const char *exif_tag)

--------------------------------------------------------------------------------------------------------------------------

2-7 add function(save to file)

Search to default_status(&state); in camcv.c and add to below line

1. state.filename=”foobar.jpg”;

save and exit.

cmake .

make

./camcv -t 1000

If succeed to take a picture,save to foobar.jpg file.