public void ReadAndWrite()
{
const string fileName = "fs.yml";
var sequence = new[] { "image1.jpg", "myfi.png", "../data/baboon.jpg" };
var map = new { @int = 12345, @double = 3.14159, @string = "foo" };
var mapSequence = new {
vec2b = new Vec2b(255, 128),
rect = new Rect(1, 2, 3, 4),
size = new Size(10, 20),
point = new Point(300, 400)
};
// write
using (var fs = new FileStorage(fileName, FileStorage.Mode.Write))
{
fs.Add("sequence").Add("[");
foreach (var s in sequence)
{
fs.Add(s);
}
fs.Add("]");
fs.Add("empty_sequence").Add("[").Add("]");
fs.Add("map").Add("{")
.Add("int").Add(map.@int)
.Add("double").Add(map.@double)
.Add("string").Add(map.@string)
.Add("}");
fs.Add("map_sequence").Add("[")
.Add("{")
.Add("vec2b").Add(mapSequence.vec2b)
.Add("rect").Add(mapSequence.rect)
.Add("}").Add("{")
.Add("size").Add(mapSequence.size)
.Add("point").Add(mapSequence.point)
.Add("}")
.Add("]");
using (Mat r = Mat.Eye(3, 3, MatType.CV_64FC1))
using (Mat t = Mat.Ones(3, 1, MatType.CV_64FC1))
using (Mat lenna = Image("lenna.png"))
{
fs.Write("R", r);
fs.Write("T", t);
fs.Write("lenna", lenna);
}
}
Assert.True(File.Exists(fileName));
// read
using (var fs = new FileStorage(fileName, FileStorage.Mode.Read))
{
Assert.True(fs.IsOpened());
// sequence
using (var node = fs["sequence"])
{
Assert.NotNull(node);
#pragma warning disable CS8602
Assert.Equal(FileNode.Types.Seq, node.Type);
// C++ style sequence reading
FileNodeIterator it = node.Begin(), end = node.End();
for (int i = 0;
!it.Equals(end);
it.MoveNext(), i++)
{
var s = it.Current.ReadString();
Assert.Equal(sequence[i], s);
}
// C# style
int j = 0;
foreach (var n in node)
{
var s = n.ReadString();
Assert.Equal(sequence[j++], s);
}
}
// empty_sequence
using (var node = fs["empty_sequence"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Seq, node.Type);
var children = node.ToArray();
Assert.Empty(children);
}
// map
using (var node = fs["map"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Map, node.Type);
Assert.Equal(map.@int, node["int"].ReadInt());
Assert.Equal(map.@double, node["double"].ReadDouble());
Assert.Equal(map.@string, node["string"].ReadString());
}
// map_sequence
using (var node = fs["map_sequence"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Seq, node.Type);
using (var elem0 = node.ElementAt(0))
using (var elem1 = node.ElementAt(1))
{
Assert.Equal(mapSequence.vec2b, elem0["vec2b"].ReadVec2b());
Assert.Equal(mapSequence.rect, elem0["rect"].ReadRect());
Assert.Equal(mapSequence.size, elem1["size"].ReadSize());
Assert.Equal(mapSequence.point, elem1["point"].ReadPoint());
}
}
// mat
using (var r = fs["R"]?.ReadMat())
using (var t = fs["T"]?.ReadMat())
{
testOutputHelper.WriteLine("R = {0}", r);
testOutputHelper.WriteLine("T = {0}", t);
Assert.Equal(1.0, r.Get <double>(0, 0));
Assert.Equal(0.0, r.Get <double>(0, 1));
Assert.Equal(0.0, r.Get <double>(0, 2));
Assert.Equal(0.0, r.Get <double>(1, 0));
Assert.Equal(1.0, r.Get <double>(1, 1));
Assert.Equal(0.0, r.Get <double>(1, 2));
Assert.Equal(0.0, r.Get <double>(2, 0));
Assert.Equal(0.0, r.Get <double>(2, 1));
Assert.Equal(1.0, r.Get <double>(2, 2));
Assert.Equal(1.0, t.Get <double>(0));
Assert.Equal(1.0, t.Get <double>(1));
Assert.Equal(1.0, t.Get <double>(2));
}
using (var storedLenna = fs["lenna"]?.ReadMat())
using (var lenna = Image("lenna.png"))
{
Assert.NotNull(storedLenna);
#pragma warning disable CS8604
ImageEquals(storedLenna, lenna);
#pragma warning restore CS8604
}
#pragma warning restore CS8602
}
}
public void ReadAndWriteInMemory()
{
var sequence = new[] { "image1.jpg", "myfi.png", "../data/baboon.jpg" };
var map = new { @int = 12345, @double = 3.14159, @string = "foo" };
var mapSequence = new
{
vec2b = new Vec2b(255, 128),
rect = new Rect(1, 2, 3, 4),
size = new Size(10, 20),
point = new Point(300, 400)
};
// write
string yaml;
using (var fs = new FileStorage("yml", FileStorage.Mode.Write | FileStorage.Mode.Memory))
{
fs.Add("sequence").Add("[");
foreach (var s in sequence)
{
fs.Add(s);
}
fs.Add("]");
fs.Add("empty_sequence").Add("[").Add("]");
fs.Add("map").Add("{")
.Add("int").Add(map.@int)
.Add("double").Add(map.@double)
.Add("string").Add(map.@string)
.Add("}");
fs.Add("map_sequence").Add("[")
.Add("{")
.Add("vec2b").Add(mapSequence.vec2b)
.Add("rect").Add(mapSequence.rect)
.Add("}").Add("{")
.Add("size").Add(mapSequence.size)
.Add("point").Add(mapSequence.point)
.Add("}")
.Add("]");
using (Mat r = Mat.Eye(3, 3, MatType.CV_64FC1))
using (Mat t = Mat.Ones(3, 1, MatType.CV_64FC1))
using (Mat lenna = Image("lenna.png"))
{
fs.Write("R", r);
fs.Write("T", t);
fs.Write("lenna", lenna);
}
yaml = fs.ReleaseAndGetString();
}
// check truncation because of StringBuilder capacity
Assert.EndsWith("]", yaml.TrimEnd());
// read
using (var fs = new FileStorage(yaml, FileStorage.Mode.Read | FileStorage.Mode.Memory))
{
Assert.True(fs.IsOpened());
// sequence
using (FileNode node = fs["sequence"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Seq, node.Type);
// C++ style sequence reading
FileNodeIterator it = node.Begin(), end = node.End();
for (int i = 0;
!it.Equals(end);
it.MoveNext(), i++)
{
var s = it.Current.ReadString();
Assert.Equal(sequence[i], s);
}
// C# style
int j = 0;
foreach (var n in node)
{
var s = n.ReadString();
Assert.Equal(sequence[j++], s);
}
}
// empty_sequence
using (FileNode node = fs["empty_sequence"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Seq, node.Type);
var children = node.ToArray();
Assert.Empty(children);
}
// map
using (FileNode node = fs["map"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Map, node.Type);
Assert.Equal(map.@int, node["int"].ReadInt());
Assert.Equal(map.@double, node["double"].ReadDouble());
Assert.Equal(map.@string, node["string"].ReadString());
}
// map_sequence
using (FileNode node = fs["map_sequence"])
{
Assert.NotNull(node);
Assert.Equal(FileNode.Types.Seq, node.Type);
using (var elem0 = node.ElementAt(0))
using (var elem1 = node.ElementAt(1))
{
Assert.Equal(mapSequence.vec2b, elem0["vec2b"].ReadVec2b());
Assert.Equal(mapSequence.rect, elem0["rect"].ReadRect());
Assert.Equal(mapSequence.size, elem1["size"].ReadSize());
Assert.Equal(mapSequence.point, elem1["point"].ReadPoint());
}
}
// mat
using (Mat r = fs["R"].ReadMat())
using (Mat t = fs["T"].ReadMat())
{
Console.WriteLine("R = {0}", r);
Console.WriteLine("T = {0}", t);
Assert.Equal(1.0, r.Get <double>(0, 0));
Assert.Equal(0.0, r.Get <double>(0, 1));
Assert.Equal(0.0, r.Get <double>(0, 2));
Assert.Equal(0.0, r.Get <double>(1, 0));
Assert.Equal(1.0, r.Get <double>(1, 1));
Assert.Equal(0.0, r.Get <double>(1, 2));
Assert.Equal(0.0, r.Get <double>(2, 0));
Assert.Equal(0.0, r.Get <double>(2, 1));
Assert.Equal(1.0, r.Get <double>(2, 2));
Assert.Equal(1.0, t.Get <double>(0));
Assert.Equal(1.0, t.Get <double>(1));
Assert.Equal(1.0, t.Get <double>(2));
}
using (Mat storedLenna = fs["lenna"].ReadMat())
using (Mat lenna = Image("lenna.png"))
{
ImageEquals(storedLenna, lenna);
}
}
}
