C# (CSharp) SVM.LoadFromString示例

示例#1

        public void SaveLoadTest()
        {
            float[,] trainFeaturesData =
            {
                {   0,   0 },
                {   0, 100 },
                { 100,   0 },
                { 100, 100 },
            };
            var trainFeatures = new Mat(4, 2, MatType.CV_32F, trainFeaturesData);

            int[] trainLabelsData = { +1, -1, +1, -1 };
            var   trainLabels     = new Mat(4, 1, MatType.CV_32S, trainLabelsData);

            const string fileName = "svm.yml";

            if (File.Exists(fileName))
            {
                File.Delete(fileName);
            }

            using (var model = SVM.Create())
            {
                model.Type         = SVM.Types.CSvc;
                model.KernelType   = SVM.KernelTypes.Linear;
                model.TermCriteria = new TermCriteria(CriteriaTypes.MaxIter, 100, 1e-6);
                model.Train(trainFeatures, SampleTypes.RowSample, trainLabels);

                model.Save(fileName);
            }

            Assert.True(File.Exists(fileName));

            string content = File.ReadAllText(fileName);

            //Console.WriteLine(content);

            //Assert.DoesNotThrow
            using (var model2 = SVM.Load(fileName))
            {
                GC.KeepAlive(model2);
            }
            using (var model2 = SVM.LoadFromString(content))
            {
                GC.KeepAlive(model2);
            }

            using (var fs = new FileStorage(fileName, FileStorage.Modes.Read))
                using (var model2 = SVM.Create())
                {
                    var node = fs["opencv_ml_svm"];
                    Assert.NotNull(node);
#pragma warning disable CS8604
                    model2.Read(node);
#pragma warning restore CS8604
                }
        }