Nenad Bulatovic's profile - activity

I am trying to compile code which uses asmlibrary (by Yao Wei) with MinGW (gcc/g++ 4.7.2), without success. I can compile same library (asmlibrary.dll) with MVSC, and author also published three files (cygasmlibrary-4.dll, libasmlibrary.a, libasmlibrary.dll.a) which supposedly should work with gcc. When I try to comppile code which uses asmlibrary, I got this error:

13:06:05 **** Rebuild of configuration Release for project AsmLibrarySDK_FIT ****
Info: Internal Builder is used for build
g++ "-IC:\\OpenCV246PC\\build\\include" -O3 -Wall -c -fmessage-length=0 -o demo_fit.o "..\\demo_fit.cpp" 
g++ "-IC:\\OpenCV246PC\\build\\include" -O3 -Wall -c -fmessage-length=0 -o video_camera.o "..\\video_camera.cpp" 
g++ "-IC:\\OpenCV246PC\\build\\include" -O3 -Wall -c -fmessage-length=0 -o vjfacedetect.o "..\\vjfacedetect.cpp" 
..\vjfacedetect.cpp: In function ‘bool detect_all_faces(asm_shape**, int&, const IplImage*)’:
..\vjfacedetect.cpp:85:11: warning: variable ‘pt1’ set but not used [-Wunused-but-set-variable]
..\vjfacedetect.cpp:85:16: warning: variable ‘pt2’ set but not used [-Wunused-but-set-variable]
g++ "-LC:\\OpenCV246MinGW\\x86\\lib" "-LC:\\asmlibraryFaceXpress" -o AsmLibrarySDK_FIT.exe vjfacedetect.o video_camera.o demo_fit.o -lopencv_calib3d246 -lopencv_contrib246 -lopencv_core246 -lopencv_features2d246 -lopencv_flann246 -lopencv_gpu246 -lopencv_highgui246 -lopencv_imgproc246 -lopencv_legacy246 -lopencv_ml246 -lopencv_nonfree246 -lopencv_objdetect246 -lopencv_photo246 -lopencv_stitching246 -lopencv_video246 -lopencv_videostab246 -lasmlibrary 
demo_fit.o:demo_fit.cpp:(.text.startup+0x4c9): undefined reference to `_imp___ZN10asmfitting12ASMSeqSearchER9asm_shapePK9_IplImageibi'
demo_fit.o:demo_fit.cpp:(.text.startup+0x638): undefined reference to `_imp__InitShapeFromDetBox'
demo_fit.o:demo_fit.cpp:(.text.startup+0x21c): undefined reference to `_imp__InitShapeFromDetBox'
demo_fit.o:demo_fit.cpp:(.text.startup+0x286): undefined reference to `_imp___ZN10asmfitting8Fitting2EP9asm_shapeiPK9_IplImagei'
demo_fit.o:demo_fit.cpp:(.text.startup+0x442): undefined reference to `_imp___ZN10asmfitting12ASMSeqSearchER9asm_shapePK9_IplImageibi'
demo_fit.o:demo_fit.cpp:(.text.startup+0x58c): undefined reference to `_imp__InitShapeFromDetBox'
c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/ld.exe: demo_fit.o: bad reloc address 0x0 in section `.ctors'
c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status

I asked author about this and he replied to me as follows:

just link like libasmlibrary.a not -lasmlibrary

what I don't understand. Even if I try from command line, g++ won't accept:

C:\Users\Nenad\eclipseCDT\opencv2cookbook\AsmLibrarySDK_FIT\Debug>g++ "-LC:\OpenCV246MinGW\x86\lib" "-LC:\asmlibraryFaceXpress" -o AsmLibrarySDK_FIT.exe vjfacedetect.o video_camera.o demo_fit.o -l opencv_calib3d246 -lopencv_contrib246 -lopencv_core246 -lopencv_features2d246 -lopencv_flann246 -lopencv_gpu246 -lopencv_highgui246 -lopencv_imgproc246 -lopencv_legacy246 -lopencv_ml246 -lopencv_nonfr ee246 -lopencv_objdetect246 -lopencv_photo246 -lopencv_stitching246 -lopencv_video246 -lopencv_videostab246 libasmlibrary.a

(error is same as on top of post) if I try to put -libasmlibrary.a (the of course) I got: c:/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/ld.exe: cannot find -llibasmlibrary.a

libasmlibrary gives me g++: error: libasmlibrary: No such file or directory and so on...

As far as I know the only correct way to link this library would be to use -lasmlibrary but then it produces the error mentioned at the top.

BTW, even if I don't include that library at all, I got this error anyway.

Then I asked author again, and he replied to me:

Code like this g++ a.c -o test libasmlibrary.a -lopencv_library

And ... (more)

I have this code which I can compile successfully in MS VS 2010, but with eclipse CDT & MinGW (gcc 4.72) I have three errors:

..\find_classes.h:90:17: error: taking address of temporary [-fpermissive]
..\find_classes.h:94:51: error: invalid initialization of non-const reference of type ‘cv::Mat&’ from an rvalue of type ‘cv::Mat’
..\find_classes.h:82:8: error: in passing argument 2 of ‘double get_distance(cv::Mat&, cv::Mat&)’

Anyone willing me to explain what is actual problem and how to fix this?

Code is here:

#ifndef _FIND_CLASSES_H_
#define _FIND_CLASSES_H_
#include "asmlibrary.h"
#include <string>
#include <fstream>

using namespace std;

const int N_FEATURES = 7;
int N_EXPRESSIONS;
int N_SAMPLES;
int N_POINTS;
char** EXP_NAMES;
int *classLabelArray;
double *classPointArray;
cv::Mat classLabels;
cv::Mat classPoints;
//cv::Mat classDistances;
cv::Mat diff;


void read_config_from_file(string filename){
    // ifstream file(filename, ios::in); // NMB
    ifstream file(filename.c_str(), ios::in);
    if(!file.is_open()){
        cout << "error opening file: " << filename << endl;
        exit(1);
    }

    file >> N_EXPRESSIONS >> N_SAMPLES;
    N_POINTS = N_EXPRESSIONS * N_SAMPLES;

    EXP_NAMES = new char*[N_EXPRESSIONS];   //read expression names from file
    for(int i=0 ; i<N_EXPRESSIONS ; i++){
        EXP_NAMES[i] = new char[11];
        file >> EXP_NAMES[i];
    }

    classLabelArray = new int[N_POINTS];    //create classLabelArray (independent from file)
    for(int i=0 ; i<N_POINTS ; i++){
        classLabelArray[i] = i/N_SAMPLES;
    }

    classPointArray = new double[N_POINTS*N_FEATURES];  //read feature values for each class from file
    for(int i=0 ; i<N_POINTS*N_FEATURES ; i++){
        file >> classPointArray[i];
    }

    file.close();

    classLabels = cv::Mat(1, N_POINTS, CV_32SC1, classLabelArray);
    classPoints = cv::Mat(N_POINTS, N_FEATURES, CV_64FC1, classPointArray);
    //classDistances = cv::Mat(N_POINTS, 1, CV_64FC1);
    diff = cv::Mat(1, N_FEATURES, CV_64FC1);
}

void config(string filename, int n_expressions, int n_samples, string *exp_names){
    // ofstream file(filename, ios::out);
    ofstream file(filename.c_str(), ios::in);
    if(!file.is_open()){
        cout << "error opening file: " << filename << endl;
        exit(1);
    }

    N_EXPRESSIONS = n_expressions;
    N_SAMPLES = n_samples;
    file << N_EXPRESSIONS << endl << N_SAMPLES << endl;
    cout << N_EXPRESSIONS << endl << N_SAMPLES << endl;
    N_POINTS = N_EXPRESSIONS * N_SAMPLES;

    EXP_NAMES = new char*[N_EXPRESSIONS];
    for(int i=0 ; i<N_EXPRESSIONS ; i++){
        cout<< exp_names[i] << endl;

        EXP_NAMES[i] = strdup(exp_names[i].c_str());
        file << EXP_NAMES[i] << endl;
    }

    file.close();
}

double get_distance(cv::Mat& p32, cv::Mat& p64) { // error: in passing argument 2 of ‘double get_distance(cv::Mat&, cv::Mat&)’
    for(int i=0; i<N_FEATURES; i++)
        diff.at<double>(0,i) = p32.at<float>(0,i) - p64.at<double>(0,i);
    return cv::norm(diff);
}

cv::Mat get_class_weights(cv::Mat instance) {
    cv::Mat weights = cv::Mat(1,N_EXPRESSIONS, CV_64FC1);
    cvZero(&(CvMat)weights); // <-- error: taking address of temporary [-fpermissive]
    double dist;

    for(int i = 0; i<N_POINTS; i++) {
        dist = get_distance(instance, classPoints.row(i)); // error: invalid initialization of non-const reference of type ‘cv::Mat&’ from an rvalue of type ‘cv::Mat’
        // classDistances.at<double>(i,0) = dist;
        // printf("%d ", classLabels.at<int>(0,i));
        weights.at<double>(0, classLabels.at<int>(0,i)) += dist;
        //printf("%.2f ",dist);
    }
    //cout <<endl;
    // printf("%lf %lf\n", weights.at<double>(0,0), weights.at<double>(0,1));

    for(int i = 0; i < N_EXPRESSIONS; i++)
        weights.at<double>(0,i) = exp(-weights.at<double>(0,i));

    double sum = cv ...

I am working on some example code for OpenCV2 & C++ and I got stuck. Compiler (MinGW, g++ 4.7.2 on Win7) says that call of overloaded ‘Point_(cv::Point2f&)’ is ambiguous but I can't find exatcly what is wrong. Here is error:

19:53:36 **** Incremental Build of configuration Debug for project Blobs ****
Info: Internal Builder is used for build
g++ "-IC:\\OpenCV246PC\\build\\include" -O0 -g3 -Wall -c -fmessage-length=0 -o blobs.o "..\\blobs.cpp" 
..\blobs.cpp: In function ‘int main()’:
..\blobs.cpp:48:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
..\blobs.cpp:48:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
..\blobs.cpp:84:37: error: call of overloaded ‘Point_(cv::Point2f&)’ is ambiguous
..\blobs.cpp:84:37: note: candidates are:
In file included from ..\blobs.cpp:3:0:
C:\OpenCV246PC\build\include/opencv2/core/core.hpp:740:5: note: cv::Point_<_Tp>::Point_(const CvPoint2D32f&) [with _Tp = int; CvPoint2D32f = CvPoint2D32f]
C:\OpenCV246PC\build\include/opencv2/core/core.hpp:739:5: note: cv::Point_<_Tp>::Point_(const CvPoint&) [with _Tp = int; CvPoint = CvPoint]
C:\OpenCV246PC\build\include/opencv2/core/core.hpp:738:5: note: cv::Point_<_Tp>::Point_(const cv::Point_<_Tp>&) [with _Tp = int; cv::Point_<_Tp> = cv::Point_<int>]

And here is the code:

#include <iostream>
#include <vector>
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>

int main()
{
    // Read input binary image
    cv::Mat image = cv::imread("binaryGroup.bmp", 0);
    if (!image.data)
        return 0;

    cv::namedWindow("Binary Image");
    cv::imshow("Binary Image", image);

    // Get the contours of the connected components
    std::vector<std::vector<cv::Point> > contours;
    cv::findContours(image, contours, // a vector of contours
            CV_RETR_EXTERNAL, // retrieve the external contours
            CV_CHAIN_APPROX_NONE); // retrieve all pixels of each contours

    // Print contours' length
    std::cout << "Contours: " << contours.size() << std::endl;
    std::vector<std::vector<cv::Point> >::const_iterator itContours = contours.begin();
    for (; itContours != contours.end(); ++itContours)
    {

        std::cout << "Size: " << itContours->size() << std::endl;
    }

    // draw black contours on white image
    cv::Mat result(image.size(), CV_8U, cv::Scalar(255));
    cv::drawContours(result, contours, -1, // draw all contours
            cv::Scalar(0), // in black
            2); // with a thickness of 2

    cv::namedWindow("Contours");
    cv::imshow("Contours", result);

    // Eliminate too short or too long contours
    int cmin = 100;  // minimum contour length
    int cmax = 1000; // maximum contour length
    std::vector<std::vector<cv::Point> >::iterator itc = contours.begin();
    while (itc != contours.end())
    {

        if (itc->size() < cmin || itc->size() > cmax)
            itc = contours.erase(itc);
        else
            ++itc;
    }

    // draw contours on the original image
    cv::Mat original = cv::imread("group.jpg");
    cv::drawContours(original, contours, -1, // draw all contours
            cv::Scalar(255, 255, 255), // in white
            2); // with a thickness of 2

    cv::namedWindow("Contours on Animals");
    cv::imshow("Contours on Animals", original);

    // Let's now draw black contours on white image
    result.setTo(cv::Scalar(255));
    cv::drawContours(result, contours, -1, // draw all contours
            cv::Scalar(0), // in black
            1); // with a thickness of 1
    image = cv::imread("binaryGroup.bmp", 0);

    // testing ...