chore: import upstream snapshot with attribution

2026-07-13 12:06:04 +08:00
commit 86c9b1c39f
7743 changed files with 3316339 additions and 0 deletions
@@ -0,0 +1,66 @@
+package org.opencv.test.dnn;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.opencv.core.Core;
+import org.opencv.core.CvType;
+import org.opencv.core.Mat;
+import org.opencv.core.MatOfByte;
+import org.opencv.core.Range;
+import org.opencv.dnn.Dnn;
+import org.opencv.dnn.Net;
+import org.opencv.test.OpenCVTestCase;
+
+public class DnnForwardAndRetrieve extends OpenCVTestCase {
+
+    public void testForwardAndRetrieve()
+    {
+        // Create a simple Caffe prototxt with a Slice layer
+        String prototxt =
+            "input: \"data\"\n" +
+            "layer {\n" +
+            "  name: \"testLayer\"\n" +
+            "  type: \"Slice\"\n" +
+            "  bottom: \"data\"\n" +
+            "  top: \"firstCopy\"\n" +
+            "  top: \"secondCopy\"\n" +
+            "  slice_param {\n" +
+            "    axis: 0\n" +
+            "    slice_point: 2\n" +
+            "  }\n" +
+            "}";
+
+        // Read network from prototxt
+        MatOfByte bufferProto = new MatOfByte();
+        bufferProto.fromArray(prototxt.getBytes());
+        Net net = Dnn.readNetFromCaffe(bufferProto);
+        net.setPreferableBackend(Dnn.DNN_BACKEND_OPENCV);
+
+        // Create input data
+        Mat inp = new Mat(4, 5, CvType.CV_32F);
+        Core.randu(inp, -1, 1);
+        net.setInput(inp);
+
+        // Define output names
+        List<String> outNames = new ArrayList<>();
+        outNames.add("testLayer");
+
+        // Forward and retrieve multiple outputs
+        List<List<Mat>> outBlobs = new ArrayList<>();
+        net.forwardAndRetrieve(outBlobs, outNames);
+
+        // Verify results
+        assertEquals(1, outBlobs.size());
+        assertEquals(2, outBlobs.get(0).size());
+
+        // Compare results
+        Mat expectedFirst = inp.rowRange(0, 2);
+        Mat expectedSecond = inp.rowRange(2, 4);
+
+        Mat actualFirst = outBlobs.get(0).get(0);
+        Mat actualSecond = outBlobs.get(0).get(1);
+
+        assertEquals(0, Core.norm(expectedFirst, actualFirst, Core.NORM_INF), EPS);
+        assertEquals(0, Core.norm(expectedSecond, actualSecond, Core.NORM_INF), EPS);
+    }
+}