Merge pull request #22229 from zihaomu:bug_fix_22195_3_4

modules/dnn/src/layers/scale_layer.cpp

@@ -91,6 +91,16 @@ public:
         if (hasWeights && hasBias)
             CV_CheckEQ(weights.total(), bias.total(), "Incompatible weights/bias blobs");
 
+        if (weights.total() == 1)
+        {
+            // The total() of bias should be same as weights.
+            if (hasBias)
+                inpBlob.convertTo(outBlob, CV_32F, weights.at<float>(0), bias.at<float>(0));
+            else
+                inpBlob.convertTo(outBlob, CV_32F, weights.at<float>(0));
+            return;
+        }
+
         int endAxis;
         for (endAxis = axis + 1; endAxis <= inpBlob.dims; ++endAxis)
         {

modules/dnn/src/onnx/onnx_importer.cpp

@@ -1818,6 +1818,8 @@ void ONNXImporter::parseMatMul(LayerParams& layerParams, const opencv_onnx::Node
 
 void findBroadAxis(const MatShape& broadShape, const MatShape& outShape, size_t& axis, int& broadAxis)
 {
+    // Currently, this function can only complete 1-dimensional expansion of broadShape.
+    // If there are two dimensions in broadShape that need to be expended, it will fail.
     const size_t diff = outShape.size() - broadShape.size();
 
     // find the first non-one element of the broadcasting shape
@@ -1982,6 +1984,10 @@ void ONNXImporter::parseMul(LayerParams& layerParams, const opencv_onnx::NodePro
         const MatShape& outShape = outShapes[node_proto.input(0)];
 
         size_t axis = 0;
+        if (total(broadShape) != 1)
+        {
+            // If broadShape is a scalar, we set axis as 0.
+            // Other-wise, we check broadcast is available.
             int broadAxis = -1;
             findBroadAxis(broadShape, outShape, axis, broadAxis);
 
@@ -2002,6 +2008,7 @@ void ONNXImporter::parseMul(LayerParams& layerParams, const opencv_onnx::NodePro
                 addLayer(concatLP, concat_node_proto);
                 node_proto.set_input(1, concatLP.name);
             }
+        }
 
         CV_Assert(axis != outShape.size());
         layerParams.set("axis", static_cast<int>(axis));

modules/dnn/test/test_onnx_importer.cpp

@@ -725,6 +725,8 @@ TEST_P(Test_ONNX_layers, Div)
 
     normAssert(ref, out, "", default_l1,  default_lInf);
     expectNoFallbacksFromIE(net);
+
+    testONNXModels("div_test_1x1",npy, 0, 0, false, true, 2);
 }
 
 TEST_P(Test_ONNX_layers, DynamicReshape)