MergeMertens_.cpp

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#include "mexopencv.hpp"
#include "opencv2/photo.hpp"
using namespace std;
using namespace cv;

// Persistent objects
namespace {
int last_id = 0;
map<int,Ptr<MergeMertens> > obj_;

Ptr<MergeMertens> create_MergeMertens(
    vector<MxArray>::const_iterator first,
    vector<MxArray>::const_iterator last)
{
    ptrdiff_t len = std::distance(first, last);
    nargchk((len%2)==0);
    float contrast_weight = 1.0f;
    float saturation_weight = 1.0f;
    float exposure_weight = 0.0f;
    for (; first != last; first += 2) {
        string key(first->toString());
        const MxArray& val = *(first + 1);
        if (key == "ContrastWeight")
            contrast_weight = val.toFloat();
        else if (key == "SaturationWeight")
            saturation_weight = val.toFloat();
        else if (key == "ExposureWeight")
            exposure_weight = val.toFloat();
        else
            mexErrMsgIdAndTxt("mexopencv:error",
                "Unrecognized option %s", key.c_str());
    }
    return createMergeMertens(contrast_weight, saturation_weight, exposure_weight);
}
}

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    // Check the number of arguments
    nargchk(nrhs>=2 && nlhs<=1);

    // Argument vector
    vector<MxArray> rhs(prhs, prhs+nrhs);
    int id = rhs[0].toInt();
    string method(rhs[1].toString());

    // Constructor is called. Create a new object from argument
    if (method == "new") {
        nargchk(nrhs>=2 && nlhs<=1);
        obj_[++last_id] = create_MergeMertens(
            rhs.begin() + 2, rhs.end());
        plhs[0] = MxArray(last_id);
        mexLock();
        return;
    }

    // Big operation switch
    Ptr<MergeMertens> obj = obj_[id];
    if (obj.empty())
        mexErrMsgIdAndTxt("mexopencv:error", "Object not found id=%d", id);
    if (method == "delete") {
        nargchk(nrhs==2 && nlhs==0);
        obj_.erase(id);
        mexUnlock();
    }
    else if (method == "clear") {
        nargchk(nrhs==2 && nlhs==0);
        obj->clear();
    }
    else if (method == "load") {
        nargchk(nrhs>=3 && (nrhs%2)==1 && nlhs==0);
        string objname;
        bool loadFromString = false;
        for (int i=3; i<nrhs; i+=2) {
            string key(rhs[i].toString());
            if (key == "ObjName")
                objname = rhs[i+1].toString();
            else if (key == "FromString")
                loadFromString = rhs[i+1].toBool();
            else
                mexErrMsgIdAndTxt("mexopencv:error",
                    "Unrecognized option %s", key.c_str());
        }
        /*
        obj_[id] = (loadFromString ?
            Algorithm::loadFromString<MergeMertens>(rhs[2].toString(), objname) :
            Algorithm::load<MergeMertens>(rhs[2].toString(), objname));
        */
        // HACK: workaround for missing MergeMertens::create()
        FileStorage fs(rhs[2].toString(), FileStorage::READ +
            (loadFromString ? FileStorage::MEMORY : 0));
        if (!fs.isOpened())
            mexErrMsgIdAndTxt("mexopencv:error", "Failed to open file");
        FileNode fn(objname.empty() ? fs.getFirstTopLevelNode() : fs[objname]);
        if (fn.empty())
            mexErrMsgIdAndTxt("mexopencv:error", "Failed to get node");
        obj->read(fn);
        //*/
    }
    else if (method == "save") {
        nargchk(nrhs==3 && nlhs==0);
        obj->save(rhs[2].toString());
    }
    else if (method == "empty") {
        nargchk(nrhs==2 && nlhs<=1);
        plhs[0] = MxArray(obj->empty());
    }
    else if (method == "getDefaultName") {
        nargchk(nrhs==2 && nlhs<=1);
        plhs[0] = MxArray(obj->getDefaultName());
    }
    else if (method == "process") {
        nargchk(nrhs==3 && nlhs<=1);
        vector<Mat> src;
        {
            vector<MxArray> arr(rhs[2].toVector<MxArray>());
            src.reserve(arr.size());
            for (vector<MxArray>::const_iterator it = arr.begin(); it != arr.end(); ++it)
                src.push_back(it->toMat(CV_8U));
        }
        Mat dst;
        obj->process(src, dst);
        plhs[0] = MxArray(dst);
    }
    else if (method == "get") {
        nargchk(nrhs==3 && nlhs<=1);
        string prop(rhs[2].toString());
        if (prop == "ContrastWeight")
            plhs[0] = MxArray(obj->getContrastWeight());
        else if (prop == "SaturationWeight")
            plhs[0] = MxArray(obj->getSaturationWeight());
        else if (prop == "ExposureWeight ")
            plhs[0] = MxArray(obj->getExposureWeight());
        else
            mexErrMsgIdAndTxt("mexopencv:error",
                "Unrecognized property %s", prop.c_str());
    }
    else if (method == "set") {
        nargchk(nrhs==4 && nlhs==0);
        string prop(rhs[2].toString());
        if (prop == "ContrastWeight")
            obj->setContrastWeight(rhs[3].toFloat());
        else if (prop == "SaturationWeight")
            obj->setSaturationWeight(rhs[3].toFloat());
        else if (prop == "ExposureWeight")
            obj->setExposureWeight(rhs[3].toFloat());
        else
            mexErrMsgIdAndTxt("mexopencv:error",
                "Unrecognized property %s", prop.c_str());
    }
    else
        mexErrMsgIdAndTxt("mexopencv:error",
            "Unrecognized operation %s", method.c_str());
}