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How to use Yolo V5 in C# with a GPU?

I spend the last days trying to get Yolo to work on my GPU. I tried using https://github.yuuza.net/mentalstack/yolov5-net, I followed their guide to use GPU and it didn't work. All other C# Yolo wrappers are not using the Yolov5 version and I want to use this one. So my question is, how can I use YoloV5 in C# (.net 5.0) with my GPU. Here is the code I used with yolov5-net :
using var image = Image.FromFile(path);
using var scorer = new YoloScorer<YoloCocoP5Model>("tinyyolov2-8.onnx");
List<YoloPrediction> predictions = scorer.Predict(image);
using var graphics = Graphics.FromImage(image);
foreach (var prediction in predictions)
{
double score = Math.Round(prediction.Score, 2);
graphics.DrawRectangles(new Pen(prediction.Label.Color, 8),
new[] { prediction.Rectangle });
var (x, y) = (prediction.Rectangle.X - 3, prediction.Rectangle.Y - 23);
graphics.DrawString($"{prediction.Label.Name} ({score})",
new Font("Arial", 40, GraphicsUnit.Pixel), new SolidBrush(prediction.Label.Color),
new PointF(x, y));
}
Console.WriteLine(outputPath);
image.Save(outputPath);
The above code works, but it eats my CPU, and it's clearly not possible to use this to process many images fast.

you can try this:
using var image = Image.FromFile(path);
var options = SessionOptions.MakeSessionOptionWithCudaProvider(0);
using var scorer = new YoloScorer<YoloCocoP5Model>("Assets/Weights/yolov5n.onnx", options);
make sure you installed CUDA toolkit and cudnn.
this code maybe work or not, i'm not sure but you can try this, that's all I can help

Error when trying to capture desktop using DXGI and DirectX11 on intel 630 HD

I get the below error when trying to use DXGI to capture the builtin screen on my laptop that runs on an Intel 630 HD with the latest driver. The code works when I capture the external screen running on my GTX 1070.
SharpDX.SharpDXException
HResult=0x80070057
Message=HRESULT: [0x80070057], Module: [General], ApiCode: [E_INVALIDARG/Invalid Arguments], Message: The parameter is incorrect.
The code in my form:
desktopDuplicator = new DesktopDuplicatorD11(1,0, DesktopDuplicatorD11.VSyncLevel.None);
The section of the code that errors:
private bool RetrieveFrame()
{
if (desktopImageTexture == null)
desktopImageTexture = new Texture2D(mDevice, mTextureDescription);
frameInfo = new OutputDuplicateFrameInformation();
try
{
mDeskDuplication.AcquireNextFrame(500, out frameInfo, out desktopResource);
}
catch (SharpDXException ex)
{
if (ex.ResultCode.Code == SharpDX.DXGI.ResultCode.WaitTimeout.Result.Code)
{
return true;
}
if (ex.ResultCode.Failure)
{
throw new DesktopDuplicationException("Failed to acquire next frame.");
}
}
using (var tempTexture = desktopResource.QueryInterface<Texture2D>())
{
mDevice.ImmediateContext.CopyResource(tempTexture, desktopImageTexture);
}
return false;
}
It errors specifically on the line:
desktopImageTexture = new Texture2D(mDevice, mTextureDescription);
What is causing the error when using the internal display and the intel 630?
Edit #1:
mTextureDescription creation:
this.mTextureDescription = new Texture2DDescription()
{
CpuAccessFlags = CpuAccessFlags.Read,
BindFlags = BindFlags.None,
Format = Format.B8G8R8A8_UNorm,
Width = this.mOutputDescription.DesktopBounds.Right,
Height = this.mOutputDescription.DesktopBounds.Bottom,
OptionFlags = ResourceOptionFlags.None,
MipLevels = 1,
ArraySize = 1,
SampleDescription = { Count = 1, Quality = 0 },
Usage = ResourceUsage.Staging
};
The whole Desktop Duplication process is done on the same thread.
Update #2:
On the intel 630 Width = this.mOutputDescription.DesktopBounds.Right, returns 0 where as on my 1070 it returns 1920.

The most simplest reason is usually the actual problem.
Intel's final WDDM 2.6 drivers do not work properly with switchable graphics, update to the DCH WDDM 2.7 driver.

First, to get hints from API about invalid argument (this is exactly what you have) you need to enable Direct3D Debug Layer. The article explains it for C++ and it is possible to do a similar trick with C# as well.
Second, important is what are effectively the arguments in the failing call, not just the code.
The code is about right but if coordinates in mOutputDescription are zero or invalid, the mentioned API call is going to fail as well. You need to set a break point and inspect the variable.

Vidyo.IO sharing screen and monitors error

I use vidyo.IO for communication using the following code
ConnectorPKG.Initialize();
var _connector = new Connector(Handle, Connector.ConnectorViewStyle.ConnectorviewstyleDefault, 8, "all#VidyoClient", "VidyoClient.log", 0);
// This should be called on each window resizing.
_connector.ShowViewAt(Handle, 0, 0, Weidth, Height);
// Registering to events we want to handle.
_connector.RegisterLocalCameraEventListener(new LocalCameraListener(this));
_connector.RegisterLocalWindowShareEventListener(new LocalWindowShareListener(this));
_connector.RegisterLocalMicrophoneEventListener(new LocalMicropfoneListener(this));
_connector.RegisterLocalSpeakerEventListener(new LocalSpeakerListener(this));
_connector.RegisterParticipantEventListener(new ParticipantListener(this));
_connector.RegisterLocalMonitorEventListener(new LocalMonitorListener(this));
_connector.RegisterMessageEventListener(new ChatListener(this));
_connector.DisableDebug();
then after joining a room I share window using code like this
var winToShare = LocalWindows.FirstOrDefault( );
if (winToShare != null)
{
winToShare.IsSelected = true;
//SetSelectedLocalWindow(winToShare);
SharingInProgress = _connector.SelectLocalWindowShare(winToShare.Object);
}
and same for monitors , Now I always get this error
can't share overconstrained frame interval

What platform are you developing for? Seems like you may be building a mobile app using Xamarin and if that's the case, you will not be able to do window/app share. That feature is available only on desktop and web clients.

SharpDx direct3d11 how to start rendering

I want to use directx on C# and I am using SharpDX wrapper. I got a book called Direct3D rendering cookbook and I got the basic code from it. I want to create a 3d world view. For that I will need a camera view and a grid that helps to recognize world position just like in Autodesk Maya but I do not know how to do that. My mind is rally mixed what should I do to start ?
Here I have code that is ready to render something I think:
using System;
using SharpDX.Windows;
using SharpDX.DXGI;
using SharpDX.Direct3D11;
using Device = SharpDX.Direct3D11.Device;
using Device1 = SharpDX.Direct3D11.Device1;
namespace CurrencyConverter
{
static class Program
{[STAThread]
static void Main()
{
// Enable object tracking
SharpDX.Configuration.EnableObjectTracking = true;
SharpDX.Animation.Timer timer = new SharpDX.Animation.Timer();
#region Direct3D Initialization
// Create the window to render to
Form1 form = new Form1();
form.Text = "D3DRendering - EmptyProject";
form.Width = 640;
form.Height = 480;
// Declare the device and swapChain vars
Device device;
SwapChain swapChain;
// Create the device and swapchain
// First create a regular D3D11 device
using (var device11 = new Device(
SharpDX.Direct3D.DriverType.Hardware,
DeviceCreationFlags.None,
new[] {
SharpDX.Direct3D.FeatureLevel.Level_11_1,
SharpDX.Direct3D.FeatureLevel.Level_11_0,
}))
{
// Query device for the Device1 interface (ID3D11Device1)
device = device11.QueryInterfaceOrNull<Device1>();
if (device == null)
throw new NotSupportedException(
"SharpDX.Direct3D11.Device1 is not supported");
}// Rather than create a new DXGI Factory we reuse the
// one that has been used internally to create the device
using (var dxgi = device.QueryInterface<SharpDX.DXGI.Device2>())
using (var adapter = dxgi.Adapter)
using (var factory = adapter.GetParent<Factory2>())
{
var desc1 = new SwapChainDescription1()
{
Width = form.ClientSize.Width,
Height = form.ClientSize.Height,
Format = Format.R8G8B8A8_UNorm,
Stereo = false,
SampleDescription = new SampleDescription(1, 0),
Usage = Usage.BackBuffer | Usage.RenderTargetOutput,
BufferCount = 1,
Scaling = Scaling.Stretch,
SwapEffect = SwapEffect.Discard,
};
swapChain = new SwapChain1(factory,
device,
form.Handle,
ref desc1,
new SwapChainFullScreenDescription()
{
RefreshRate = new Rational(60, 1),
Scaling = DisplayModeScaling.Centered,
Windowed = true
},
// Restrict output to specific Output (monitor)
adapter.Outputs[0]);
}
// Create references for backBuffer and renderTargetView
var backBuffer = Texture2D.FromSwapChain<Texture2D>(swapChain,
0);
var renderTargetView = new RenderTargetView(device,
backBuffer);
#endregion
// Setup object debug names
device.DebugName = "The Device";
swapChain.DebugName = "The SwapChain";
backBuffer.DebugName = "The Backbuffer";
renderTargetView.DebugName = "The RenderTargetView";
#region Render loop
// Create and run the render loop
RenderLoop.Run(form, () =>
{
// Clear the render target with...
var lerpColor = SharpDX.Color.Lerp(SharpDX.Color.White,
SharpDX.Color.DarkBlue,
(float)((timer.Time) / 10.0 % 1.0));
device.ImmediateContext.ClearRenderTargetView(
renderTargetView,
lerpColor);
// Execute rendering commands here...
//...
//I DO NOT HAVE ANY IDEA
//...
// Present the frame
swapChain.Present(0, PresentFlags.RestrictToOutput);
});
#endregion
#region Direct3D Cleanup
// Release the device and any other resources created
renderTargetView.Dispose();
backBuffer.Dispose();
device.Dispose();
swapChain.Dispose();
#endregion
}
}
}

Generally speaking, with Direct3D you need a substantial amount of code before to have anything happening on the screen.
In the SharpDX repository you have the MiniCube sample which contains enough to really get you started, as it has all the elements required to draw a 3d scene.
I recommend to particularily look for:
Depth buffer creation (DepthStencilView)
fx file, as you need shaders to have anything on the screen (no more fixed funtion)
How the Vertex Buffer is created, you need to split geometry in triangles (in common cases, there are other possibilities).
Don't forget the SetViewport (it's really common to have it omitted)
The calls referring to Input Assembler are assigning the geometry to be drawn
Constant buffer creation : this is to pass matrices and changing data (like diffuse)
Also make sure to have DeviceCreationFlags.None with the Device.CreateWithSwapChain call, and in visual studio debug options, use "Enable Native Code Debugging". This will give you errors and warnings if something is not set properly, plus a meaningful reason in case any for the resource creation fails (instead of "Invalid Args", which is quite pointless).
As another recommendation, all the Direct3D11 resource creation parameters are incredibly error prone and tedious (many options are non compatible between each other), so it quite important to wrap those into some easier to use helper functions (and make a small amount of unit tests to validate them once and for all). The old Toolkit has quite some of those examples
SharpDX wrapper is relatively close to the c++ counterpart, so anything in the c++ documentation applies to it too.

.Net Application to capture image from pda camera

I need a .net application to interact with pda's camera so that with save button (in my application) I can save in sql server, with zoom button (in my application) I can zoom the image.

mmm, at first glance your question reads like you are after an app to do this (which is why I voted to close the question as non programming related)
but...If you are in fact after the compact framework code for this then, this may help (and I'll try reverse my vote...)
CameraCaptureDialog cameraCapture = new CameraCaptureDialog();
cameraCapture.Owner = null;
cameraCapture.InitialDirectory = #"\My Documents";
cameraCapture.DefaultFileName = #"test.3gp";
cameraCapture.Title = "Camera Demo";
cameraCapture.VideoTypes = CameraCaptureVideoTypes.Messaging;
cameraCapture.Resolution = new Size(176, 144);
cameraCapture.VideoTimeLimit = new TimeSpan(0, 0, 15); // Limited to 15 seconds of video.
cameraCapture.Mode = CameraCaptureMode.VideoWithAudio;
if (DialogResult.OK == cameraCapture.ShowDialog())
{
Console.WriteLine("The picture or video has been successfully captured to:\n{0}", cameraCapture.FileName);
}
This code snipped from the MSDN article on the CameraCaptureDialog