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2014-04-28 07:47:15 -0600
| received badge | ● Student
(source)
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2014-03-30 12:46:56 -0600
| answered a question | building openCV 2.4.2 on OS X 10.9 fails adrian, thanks for solving the problem, but your description is no clear and not detail.
would you please describe you solution more clearly ? Thanks! |
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2014-03-30 11:18:33 -0600
| asked a question | failed to make opencv.git with gcc48 on macosx mavericks I forked the repos, and clone a copy on my computer,
my OS is macosx maverick and the gcc version is 4.8 I just failed to make the fresh opencv, the error messages are as below,
It is the matter of the gcc ? In file included from /Users/benzene/works/OpenCV/opencv/modules/core/include/opencv2/core.hpp:52:0,
from /Users/benzene/works/OpenCV/opencv/modules/highgui/include/opencv2/highgui.hpp:46,
from /Users/benzene/works/OpenCV/opencv/modules/highgui/src/precomp.hpp:45,
from /Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:43:
/Users/benzene/works/OpenCV/opencv/modules/core/include/opencv2/core/base.hpp:228:35: warning: unknown option after '#pragma GCC diagnostic' kind [-Wpragmas]
# pragma GCC diagnostic ignored "-Winvalid-noreturn"
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm: In function 'void cvDestroyAllWindows()':
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:199:23: error: expected ';' before 'in'
for(NSString *key in list) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:199:23: error: 'in' was not declared in this scope
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:199:26: error: expected ';' before 'list'
for(NSString *key in list) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:199:26: warning: for increment expression has no effect [-Wunused-value]
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm: In function 'void cvShowImage(const char*, const CvArr*)':
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:31: error: expected ';' before 'in'
for(NSString *key in [window sliders]) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:31: error: 'in' was not declared in this scope
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:42: error: expected ']' before 'sliders'
for(NSString *key in [window sliders]) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:42: error: expected ';' before 'sliders'
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:42: error: 'sliders' was not declared in this scope
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:49: error: expected ')' before ']' token
for(NSString *key in [window sliders]) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:49: error: expected primary-expression before ']' token
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:49: error: expected ';' before ']' token
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:229:27: warning: unused variable 'key' [-Wunused-variable]
for(NSString *key in [window sliders]) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm: In function 'const char* cvGetWindowName(void*)':
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:435:23: error: expected ';' before 'in'
for(NSString *key in windows) {
^
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:435:23: error: 'in' was not declared in this scope
/Users/benzene/works/OpenCV/opencv/modules/highgui/src/window_cocoa.mm:435:26: error: expected ';' before 'windows'
for(NSString *key in windows) {
^
/Users/benzene/works/OpenCV ...
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2014-03-30 10:45:07 -0600
| received badge | ● Editor
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2014-03-30 05:46:13 -0600
| asked a question | failed to make opencv with tbb42 on macosx Mavericks I installed mac version of tbb42_20140122oss on my macbook pro which running on Mavericks.
I tried to install opencv-2.4.8 with tbb enabled.
(after issuing the cmake with -DWITH_TBB=ON), the report shown "with TBB YES".
PS: I'm using gcc4.8 mkdir debug
cmake -DWITH_TBB=ON -DENABLE_SSE3=ON -DENABLE_SSSE3=ON -DENABLE_SSSE3=ON -DENABLE_SSE42=ON -DBUILD_EXAMPLES=ON -DBUILD_NEW_PYTHON_SUPPORT=ON -DBUILD_PERF_TESTS=ON -DINSTALL_C_EXAMPLES=NO -DINSTALL_PYTHON_EXAMPLES=ON -D CMAKE_BUILD_TYPE=DEBUG -D CMAKE_INSTALL_PREFIX=/usr/local -G "Unix Makefiles" ..
make
However I was unable to make the opencv, it died at In file included from /usr/local/include/tbb/combinable.h:32:0,
from /usr/local/include/tbb/tbb.h:49,
from /Users/benzene/works/OpenCV/opencv-2.4.8/modules/core/include/opencv2/core/internal.hpp:179,
from /Users/benzene/works/OpenCV/opencv-2.4.8/modules/highgui/src/precomp.hpp:50,
from /Users/benzene/works/OpenCV/opencv-2.4.8/modules/highgui/src/window_cocoa.mm:43:
/usr/local/include/tbb/enumerable_thread_specific.h: In instantiation of 'static _opaque_pthread_t* tbb::interface6::internal::ets_base<ETS_key_type>::key_of_current_thread() [with tbb::ets_key_usage_type ETS_key_type = (tbb::ets_key_usage_type)1u; tbb::interface6::internal::ets_base<ETS_key_type>::key_type = _opaque_pthread_t*]':
/usr/local/include/tbb/enumerable_thread_specific.h:173:54: required from 'void* tbb::interface6::internal::ets_base<ETS_key_type>::table_lookup(bool&) [with tbb::ets_key_usage_type ETS_key_type = (tbb::ets_key_usage_type)1u]'
/usr/local/include/tbb/enumerable_thread_specific.h:281:36: required from here
/usr/local/include/tbb/enumerable_thread_specific.h:98:70: warning: declaration of 'id' shadows a global declaration [-Wshadow]
tbb::tbb_thread::id id = tbb::this_tbb_thread::get_id();
^
make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/src/window_cocoa.mm.o] Error 1
make[1]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
make: *** [all] Error 2
could somebody helps me out ? |
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2013-09-03 00:49:59 -0600
| asked a question | the correct use of "step" I was trying to use draw a gradient image(kind of gimp style) using "step".
But the result turn out to be wrong. Could anyone give me some hints ? #include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main( int argc, char** argv )
{
Mat img;
Scalar a = 0;
img = Mat(32, 32, CV_8UC1, a);
unsigned char *p;
for(int i=0; i<img.rows; i++)
{
p = img.data + i*img.step[0];
for(int j=0; j<img.cols; j++, p++)
{
*p = j;
}
}
imwrite("gradient.png", img);
return 0;
}
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2013-09-02 20:32:25 -0600
| received badge | ● Critic
(source)
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2013-09-02 20:07:02 -0600
| commented question | how do I draw a gradient image with internal data structure(step) of opencv thanks for the reply. But there is some mis-understanding, the gradient image I mentioned is some kind of gimp style gradient image. Please kindly check the code above. thanks! |
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2013-09-02 04:26:01 -0600
| asked a question | how do I draw a gradient image with internal data structure(step) of opencv I was trying to draw a gradient image with opencv's step But the result was wrong. Could someone give me some hints ? thanks! #include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main( int argc, char** argv )
{
Mat img;
Scalar a = 0;
img = Mat(32, 32, CV_8UC1, a);
unsigned char *p;
for(int i=0; i<img.rows; i++)
{
p = img.data + i*img.step[0];
for(int j=0; j<img.cols; j++, p++)
{
*p = j;
}
}
imwrite("gradient.png", img);
return 0;
}
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