Example BLOB_MSER

samples/cpp/BLOB_MSER.cpp

@@ -9,7 +9,7 @@ static void help()
 {
     cout << "\n This program demonstrates how to use BLOB and MSER to detect region \n"
         "Usage: \n"
-        "  ./BLOB_MSER <image1(../data/basketball1.png as default)>\n"
+        "  ./BLOB_MSER <image1(../data/forme2.jpg as default)>\n"
         "Press a key when image window is active to change descriptor";
 }
 
@@ -45,6 +45,53 @@ struct MSERParams
     int edgeBlurSize;
     };
 
+String Legende(SimpleBlobDetector::Params &pAct)
+{
+    String s="";
+    if (pAct.filterByArea)
+        {
+        String inf = static_cast<ostringstream*>(&(ostringstream() << pAct.minArea))->str();
+        String sup = static_cast<ostringstream*>(&(ostringstream() << pAct.maxArea))->str();
+        s = " Area range [" + inf + " to  " + sup + "]";
+        }
+    if (pAct.filterByCircularity)
+        {
+        String inf = static_cast<ostringstream*>(&(ostringstream() << pAct.minCircularity))->str();
+        String sup = static_cast<ostringstream*>(&(ostringstream() << pAct.maxCircularity))->str();
+        if (s.length()==0)
+            s = " Circularity range [" + inf + " to  " + sup + "]";
+        else
+            s += " AND Circularity range [" + inf + " to  " + sup + "]";
+        }
+    if (pAct.filterByColor)
+        {
+        String inf = static_cast<ostringstream*>(&(ostringstream() << pAct.blobColor))->str();
+        if (s.length() == 0)
+            s = " Blob color " + inf;
+        else
+            s += " AND Blob color " + inf;
+        }
+    if (pAct.filterByConvexity)
+        {
+        String inf = static_cast<ostringstream*>(&(ostringstream() << pAct.minConvexity))->str();
+        String sup = static_cast<ostringstream*>(&(ostringstream() << pAct.maxConvexity))->str();
+        if (s.length() == 0)
+            s = " Convexity range[" + inf + " to  " + sup + "]";
+        else
+            s += " AND  Convexity range[" + inf + " to  " + sup + "]";
+        }
+    if (pAct.filterByInertia)
+        {
+        String inf = static_cast<ostringstream*>(&(ostringstream() << pAct.minInertiaRatio))->str();
+        String sup = static_cast<ostringstream*>(&(ostringstream() << pAct.maxInertiaRatio))->str();
+        if (s.length() == 0)
+            s = " Inertia ratio range [" + inf + " to  " + sup + "]";
+        else
+            s += " AND  Inertia ratio range [" + inf + " to  " + sup + "]";
+        }
+    return s;
+}
+
 
 
 int main(int argc, char *argv[])
@@ -52,7 +99,7 @@ int main(int argc, char *argv[])
     vector<String> fileName;
     if (argc == 1)
         {
-        fileName.push_back("../data/forme.jpg");
+        fileName.push_back("../data/BLOB_MSER.bmp");
         }
     else if (argc == 2)
         {
@@ -69,11 +116,13 @@ int main(int argc, char *argv[])
         cout << "Image " << fileName[0] << " is empty or cannot be found\n";
         return(0);
         }
-    GaussianBlur(imgOrig,img,Size(11,11),5,5);
+    GaussianBlur(imgOrig,img,Size(11,11),0.1,0.1);
+
     SimpleBlobDetector::Params pDefaultBLOB;
+    MSERParams pDefaultMSER;
     // This is default parameters for SimpleBlobDetector
     pDefaultBLOB.thresholdStep = 10;
-    pDefaultBLOB.minThreshold = 1;
+    pDefaultBLOB.minThreshold = 10;
     pDefaultBLOB.maxThreshold = 220;
     pDefaultBLOB.minRepeatability = 2;
     pDefaultBLOB.minDistBetweenBlobs = 10;
@@ -83,7 +132,7 @@ int main(int argc, char *argv[])
     pDefaultBLOB.minArea = 25;
     pDefaultBLOB.maxArea = 5000;
     pDefaultBLOB.filterByCircularity = false;
-    pDefaultBLOB.minCircularity = 0.8f;
+    pDefaultBLOB.minCircularity = 0.9f;
     pDefaultBLOB.maxCircularity = std::numeric_limits<float>::max();
     pDefaultBLOB.filterByInertia = false;
     pDefaultBLOB.minInertiaRatio = 0.1f;
@@ -91,7 +140,6 @@ int main(int argc, char *argv[])
     pDefaultBLOB.filterByConvexity = false;
     pDefaultBLOB.minConvexity = 0.95f;
     pDefaultBLOB.maxConvexity = std::numeric_limits<float>::max();
-    MSERParams pDefaultMSER;
     // Descriptor array (BLOB or MSER)
     vector<String> typeDesc;
     // Param array for BLOB
@@ -99,35 +147,58 @@ int main(int argc, char *argv[])
     vector<SimpleBlobDetector::Params>::iterator itBLOB;
     // Param array for MSER
     vector<MSERParams> pMSER;
+    vector<MSERParams>::iterator itMSER;
 
     // Color palette
     vector<Vec3b>  palette;
     for (int i=0;i<65536;i++)
         palette.push_back(Vec3b(rand(),rand(),rand()));
     help();
+    typeDesc.push_back("MSER");
+    pMSER.push_back(pDefaultMSER);
+    pMSER.back().minArea = 1;
+    pMSER.back().maxArea = img.rows*img.cols;
+
+    typeDesc.push_back("BLOB");
+    pBLOB.push_back(pDefaultBLOB);
+    pBLOB.back().filterByColor = true;
+    pBLOB.back().blobColor = 255;
     // This descriptor are going to be detect and compute 4 BLOBS with 4 differents params
+    // Param for first BLOB detector we want all
     typeDesc.push_back("BLOB");    // see http://docs.opencv.org/trunk/d0/d7a/classcv_1_1SimpleBlobDetector.html
     pBLOB.push_back(pDefaultBLOB);
     pBLOB.back().filterByArea = true;
     pBLOB.back().minArea = 1;
     pBLOB.back().maxArea = img.rows*img.cols;
+    // Param for second BLOB detector we want area between 500 and 2900 pixels
     typeDesc.push_back("BLOB");
     pBLOB.push_back(pDefaultBLOB);
     pBLOB.back().filterByArea = true;
-    pBLOB.back().maxArea = img.rows*img.cols;
-    pBLOB.back().filterByCircularity = true;
+    pBLOB.back().minArea = 500;
+    pBLOB.back().maxArea = 2900;
+    // Param for third BLOB detector we want only circular object
     typeDesc.push_back("BLOB");    
     pBLOB.push_back(pDefaultBLOB);
+    pBLOB.back().filterByCircularity = true;
+    // Param for Fourth BLOB detector we want ratio inertia
+    typeDesc.push_back("BLOB");
+    pBLOB.push_back(pDefaultBLOB);
     pBLOB.back().filterByInertia = true;
-    typeDesc.push_back("BLOB");    
+    pBLOB.back().minInertiaRatio = 0;
+    pBLOB.back().maxInertiaRatio = 0.2;
+    // Param for Fourth BLOB detector we want ratio inertia
+    typeDesc.push_back("BLOB");
     pBLOB.push_back(pDefaultBLOB);
-    pBLOB.back().filterByColor = true;
-    pBLOB.back().blobColor = 60;
-    typeDesc.push_back("MSER");    
-    itBLOB=pBLOB.begin();
+    pBLOB.back().filterByConvexity = true;
+    pBLOB.back().minConvexity = 0.;
+    pBLOB.back().maxConvexity = 0.9;
+
+
+    itBLOB = pBLOB.begin();
+    itMSER = pMSER.begin();
     vector<double> desMethCmp;
     Ptr<Feature2D> b;
-
+    String label;
     // Descriptor loop
     vector<String>::iterator itDesc;
     for (itDesc = typeDesc.begin(); itDesc != typeDesc.end(); itDesc++)
@@ -135,11 +206,14 @@ int main(int argc, char *argv[])
         vector<KeyPoint> keyImg1;
         if (*itDesc == "BLOB"){
             b = SimpleBlobDetector::create(*itBLOB);
+            label=Legende(*itBLOB);
+
             itBLOB++;
         }
         if (*itDesc == "MSER"){
-            b = MSER::create();
-        }
+            b = MSER::create(itMSER->delta, itMSER->minArea,itMSER->maxArea,itMSER->maxVariation,itMSER->minDiversity,itMSER->maxEvolution,
+                itMSER->areaThreshold,itMSER->minMargin,itMSER->edgeBlurSize);
+            }
         try {
             // We can detect keypoint with detect method
             vector<KeyPoint>  keyImg;
@@ -167,7 +241,6 @@ int main(int argc, char *argv[])
                 int i=0;
                 for (vector<KeyPoint>::iterator k=keyImg.begin();k!=keyImg.end();k++,i++)
                     circle(result,k->pt,k->size,palette[i%65536]);
-                    
             }
             if (b.dynamicCast<MSER>() != NULL)
             {
@@ -194,12 +267,12 @@ int main(int argc, char *argv[])
                     for (vector <Point>::iterator itp = region[i].begin(); itp != region[i].end(); itp++)
                         {
 
-                        result.at<Vec3b>(itp->y, itp->x) += palette[i % 65536];
+                        result.at<Vec3b>(itp->y, itp->x) = Vec3b(0,255,255);
                         }
                     }
                 }
-            namedWindow(*itDesc , WINDOW_AUTOSIZE);
-            imshow(*itDesc, result);
+            namedWindow(*itDesc+label , WINDOW_AUTOSIZE);
+            imshow(*itDesc + label, result);
             imshow("Original", img);
             FileStorage fs(*itDesc + "_" + fileName[0] + ".xml", FileStorage::WRITE);
             fs<<*itDesc<<keyImg;