diff --git a/alg/libqr.cpp b/alg/libqr.cpp
index c7827e7..3fa1c44 100644
--- a/alg/libqr.cpp
+++ b/alg/libqr.cpp
@@ -263,15 +263,7 @@ bool check_blur_by_sobel(ProcessState &ps, Mat &gray, string &err)
 static
 bool check_sharpness(ProcessState &ps, Mat &gray, int method, string &err)
 {
-    if (method == 0) {
-        return check_blur_by_laplacian(ps, gray, err);
-    } else if (method == 1) {
-        return check_blur_by_energy_gradient(gray, err);
-    } else if (method == 2) {
-        return check_blur_by_sobel(ps, gray, err);
-    }
-    err = "unknown sharpness method: " + to_string(method);
-    return false;
+    return check_blur_by_sobel(ps, gray, err);
 }
 
 #define COUNT_COMPONENTS 0
@@ -458,14 +450,8 @@ bool emblem_dot_angle(ProcessState &ps, InputArray in, float &angle, string &qrc
             return false;
         }
 
-        int a = emblem_detect_angle(ps.dot_area_gray, false, err);
-        if (a > 0) {
-            angle = a;
-            return true;
-        } else {
-            err = "cannot detect angle";
-            return false;
-        }
+        angle = 0;
+        return true;
     } catch (const std::exception &exc) {
         std::cout << exc.what() << std::endl;
         err = "exception";