平坦区域虚拟面增长优化

libs/MVS/SceneTexture.cpp

@@ -471,7 +471,7 @@ struct MeshTexture {
 	*/
 
 public:
-	MeshTexture(Scene& _scene, unsigned _nResolutionLevel=0, unsigned _nMinResolution=640);
+	MeshTexture(Scene& _scene, unsigned _nResolutionLevel=0, unsigned _nMinResolution=640, Mesh::FaceIdxArr* _curvatureRegions=nullptr);
 	~MeshTexture();
 
 	void ListVertexFaces();
@@ -512,6 +512,8 @@ public:
 	float ComputeAverageQuality(const FaceDataArr& virtualFaceData) const;
 	FaceDataArr MergeFaceData(const FaceDataArr& data1, const FaceDataArr& data2) const;
 
+	bool ShouldStopGrowthByCurvature(FIndex currentFace, FIndex seedFace, float centerCurvature) const;
+
 	bool CreateVirtualFaces7(FaceDataViewArr& facesDatas, FaceDataViewArr& virtualFacesDatas, VirtualFaceIdxsArr& virtualFaces, std::vector<bool>& isVirtualFace, unsigned minCommonCameras=2, float thMaxNormalDeviation=25.f) const;
 	IIndexArr SelectBestViews(const FaceDataArr& faceDatas, FIndex fid, unsigned minCommonCameras, float ratioAngleToQuality) const;
 	IIndexArr SelectBestViews2(const FaceDataArr& faceDatas, FIndex fid, unsigned minCommonCameras, float ratioAngleToQuality, FaceDataViewArr& facesDatas) const;
@@ -731,6 +733,7 @@ public:
 	ImageArr& images;
 
 	Scene& scene; // the mesh vertices and faces
+    Mesh::FaceIdxArr* curvatureRegions;
 };
 
 // creating an invalid mask for the given image corresponding to
@@ -764,7 +767,7 @@ static Image8U DetectInvalidImageRegions(const Image8U3& image)
 	return mask;
 }
 
-MeshTexture::MeshTexture(Scene& _scene, unsigned _nResolutionLevel, unsigned _nMinResolution)
+MeshTexture::MeshTexture(Scene& _scene, unsigned _nResolutionLevel, unsigned _nMinResolution, Mesh::FaceIdxArr* _curvatureRegions)
 	:
 	nResolutionLevel(_nResolutionLevel),
 	nMinResolution(_nMinResolution),
@@ -778,7 +781,8 @@ MeshTexture::MeshTexture(Scene& _scene, unsigned _nResolutionLevel, unsigned _nM
 	faces(_scene.mesh.faces),
 	images(_scene.images),
 	scene(_scene), 
-	alternativeTexture(nullptr)
+	alternativeTexture(nullptr),
+	curvatureRegions(nullptr)
 {
 }
 MeshTexture::~MeshTexture()
@@ -4307,6 +4311,28 @@ float MeshTexture::ComputeAverageQuality(const FaceDataArr& virtualFaceData) con
     
     return count > 0 ? totalQuality / static_cast<float>(count) : 0.0f;
 }
+
+bool MeshTexture::ShouldStopGrowthByCurvature(FIndex currentFace, FIndex seedFace, float centerCurvature) const
+{
+    // 软化逻辑（同上）
+    const float curvCurrent = meshCurvatures[currentFace];
+    const float curvSeed = meshCurvatures[seedFace];
+    const float curvDiff = std::abs(curvCurrent - curvSeed);
+    
+    float threshold;
+    if (centerCurvature < 0.1f) {
+        threshold = 0.3f;
+    } else if (centerCurvature < 0.2f) {
+        threshold = 0.15f;
+    } else if (centerCurvature < 0.4f) {
+        threshold = 0.08f;
+    } else {
+        threshold = 0.03f;
+    }
+    
+    return curvDiff > threshold;
+}
+
 MeshTexture::FaceDataArr MeshTexture::MergeFaceData(const FaceDataArr& data1, const FaceDataArr& data2) const
 {
     FaceDataArr mergedData;
@@ -6368,8 +6394,14 @@ bool MeshTexture::CreateVirtualFaces65(FaceDataViewArr& facesDatas, FaceDataView
 				if (cosFaceToCenter < dynamicCosTh)
 					continue;
 
-				if (meshCurvatures[currentFaceId] > 0.2f)
-        			continue;
+				// if (meshCurvatures[currentFaceId] > 0.2f)
+        		// 	continue;
+
+				// 软化曲率检查
+				const float centerCurvature = meshCurvatures[virtualFaceCenterFaceID];
+				if (ShouldStopGrowthByCurvature(currentFaceId, virtualFaceCenterFaceID, centerCurvature)) {
+					continue;
+				}
 
 				// check if current face is seen by all cameras in selectedCams
 				ASSERT(!selectedCams.empty());
@@ -12801,6 +12833,7 @@ bool Scene::TextureMesh(unsigned nResolutionLevel, unsigned nMinResolution, unsi
 	int nIgnoreMaskLabel, int maxTextureSize, const IIndexArr& views, const SEACAVE::String& baseFileName, bool bOriginFaceview,
 	const std::string& inputFileName, const std::string& meshFileName)
 {
+	Mesh::FaceIdxArr regionMap;
 	if (!bOriginFaceview)
 	{
 		// 确保网格拓扑结构已计算
@@ -12819,11 +12852,10 @@ bool Scene::TextureMesh(unsigned nResolutionLevel, unsigned nMinResolution, unsi
 	        mesh.ListBoundaryVertices(); // 计算边界顶点
 	    }
 
-		Mesh::FaceIdxArr regionMap;
 	    this->SegmentMeshBasedOnCurvature(regionMap, 0.2f); // 曲率阈值设为0.2
 	}
 
-	MeshTexture texture(*this, nResolutionLevel, nMinResolution);
+	MeshTexture texture(*this, nResolutionLevel, nMinResolution, &regionMap);
 
 	// printf("baseFileName=%s\n", baseFileName.c_str());