Update thinning.cpp

Author: sturkmen72

modules/ximgproc/src/thinning.cpp

@@ -100,21 +100,21 @@ static void thinningIteration(Mat &img, Mat &marker, const uint8_t* const lut) {
     marker.row(0).setTo(1);
     marker.row(rows - 1).setTo(1);
 
-    marker.forEach<uchar>([=](uchar& value, const int postion[]) {
-        int i = postion[0];
-        int j = postion[1];
+    marker.forEach<uchar>([=](uchar& value, const int position[]) {
+        int i = position[0];
+        int j = position[1];
         if (i == 0 || j == 0 || i == rows - 1 || j == cols - 1) { return; }
 
         auto ptr = img.ptr(i, j); // p1
         if (ptr[0]) {
-            uchar p2 = ptr[-cols];
-            uchar p3 = ptr[-cols + 1];
-            uchar p4 = ptr[1];
-            uchar p5 = ptr[cols + 1];
-            uchar p6 = ptr[cols];
-            uchar p7 = ptr[cols - 1];
-            uchar p8 = ptr[-1];
-            uchar p9 = ptr[-cols - 1];
+            uchar p2 = ptr[-cols] != 0;
+            uchar p3 = ptr[-cols + 1] != 0;
+            uchar p4 = ptr[1] != 0;
+            uchar p5 = ptr[cols + 1] != 0;
+            uchar p6 = ptr[cols] != 0;
+            uchar p7 = ptr[cols - 1] != 0;
+            uchar p8 = ptr[-1] != 0;
+            uchar p9 = ptr[-cols - 1] != 0;
 
             int neighbors = p9 | (p2 << 1) | (p3 << 2) | (p4 << 3) | (p5 << 4) | (p6 << 5) | (p7 << 6) | (p8 << 7);
             value = lut[neighbors];