I use the NTWAIN library, found a good solution for interacting with this library, modified it a little. This is actually it:
public class ScanningTwain
{
List<Image> ImagesScan;
DataSource myDS;
TwainSession session;
public ScanningTwain()
{
ImagesScan = new List<Image>();
}
public List<Image> Scan(decimal dpi)
{
ImagesScan.Clear();
var appId = TWIdentity.CreateFromAssembly(DataGroups.Image, Assembly.GetExecutingAssembly());
session = new TwainSession(appId);
session.TransferReady += session_TransferReady;
session.DataTransferred += session_DataTransferred;
session.SourceDisabled += session_SourceDisable;
session.Open();
IEnumerable<DataSource> lesSources = session.GetSources();
myDS = lesSources.FirstOrDefault();
myDS.Open();
PixelType typeCouleur = PixelType.Gray;
if (myDS.Capabilities.ICapPixelType.CanSet &&
myDS.Capabilities.ICapPixelType.GetValues().Contains(typeCouleur))
{
myDS.Capabilities.ICapPixelType.SetValue(typeCouleur);
}
TWFix32 DPI = (float)dpi;
if (myDS.Capabilities.ICapXResolution.CanSet &&
myDS.Capabilities.ICapXResolution.GetValues().Contains(DPI))
{
myDS.Capabilities.ICapXResolution.SetValue(DPI);
}
if (myDS.Capabilities.ICapYResolution.CanSet &&
myDS.Capabilities.ICapYResolution.GetValues().Contains(DPI))
{
myDS.Capabilities.ICapYResolution.SetValue(DPI);
}
myDS.Enable(SourceEnableMode.ShowUI, false, System.IntPtr.Zero);
EventWaitHandle session_SourceDisable_Wait = new EventWaitHandle(false, EventResetMode.AutoReset);
session_SourceDisable_Wait.WaitOne();
return ImagesScan;
}
void session_DataTransferred(object sender, NTwain.DataTransferredEventArgs e)
{
if (e.NativeData != IntPtr.Zero)
{
Bitmap img = null;
//Need to save out the data.
Stream s = e.GetNativeImageStream();
BitmapSource bitmapsource = s.ConvertToWpfBitmap();
using (MemoryStream outStream = new MemoryStream())
{
BitmapEncoder enc = new BmpBitmapEncoder();
enc.Frames.Add(BitmapFrame.Create(bitmapsource));
enc.Save(outStream);
img = new Bitmap(outStream);
}
if (img != null)
{
ImagesScan.Add(img);
}
}
}
void session_SourceDisable(object sender, EventArgs e)
{
myDS.Close();
session.Close();
}
void session_TransferReady(object sender, NTwain.TransferReadyEventArgs e)
{
}
}
The error occurs at the line: myDS.Open () ; in the public List <Image> Scan (decimal dpi) method writes that myDS = null , I suppose this is due to the fact that when this line is executed session.Open () ; DSM does not appear so that you can select a scanner. Although I downloaded DSM from the official site. Thank you in advance for your help!
Related
I'm trying to change an image on runtime but it's not working.
I have a user control that when you click on imagebtn it's opening a new window with a list of images.
the next step is to take the image selected from the list, close the new window, and put the image on the imagebtn.
the user control still opens in the background.
this is my code.
NewWindow:
private string myData;
public ImagesWindow()
{
InitializeComponent();
InitialImageList();
}
private async void InitialImageList()
{
//add try catch
string get = await HttpRequests.GetRequest(URLImages);
allJsonCategory = JsonConvert.DeserializeObject<List<ImageArray>>(get);
Console.WriteLine(get);
ImageBoxList.ItemsSource = images;
foreach (var item in allJsonCategory)
{
images.Add(item);
}
}
private void ImageBoxList_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
selectedImage = (ImageArray)ImageBoxList.SelectedItem;
myData = selectedImage.full_path;
Console.WriteLine("you clicked on: " + selectedImage.name);
ProductsCategory pro = new ProductsCategory();
pro.imagePath = myData;
this.Close();
}
my usercontrol(in mainWindow):
public void setImage(string imagePath)
{
if (!imageURL.Equals(""))
{
Image imageBtn = new Image();
var imgUrl = new Uri(imagePath);
var imageData = new WebClient().DownloadData(imgUrl);
// or you can download it Async won't block your UI
// var imageData = await new WebClient().DownloadDataTaskAsync(imgUrl);
var bitmapImage = new BitmapImage { CacheOption = BitmapCacheOption.OnLoad };
bitmapImage.BeginInit();
bitmapImage.StreamSource = new MemoryStream(imageData);
bitmapImage.EndInit();
imageBtn.Source = bitmapImage;
//this.imageBtn.InvalidateVisual();
}
}
XAML of the image:
where is my mistake?
thank you all :)
I'm exploring Microsoft Cognitive Face API and I'm very new to it. I'm able to achieve Face Attributes with an image which is easy but, my question is how can I get Face Attributes of a person in a real time video feed from Kinect in WPF c#. It would be great if somebody can help me out. Thanks in Advance!
I have tried capturing the frame from the Kinect color feed at every 2 seconds to some file location and use that file path and converted it to a Stream and then pass it on to the Face-API Functions and that worked. Following is the code I tried.
namespace CognitiveFaceAPISample
{
public partial class MainWindow : Window
{
private readonly IFaceServiceClient faceServiceClient = new FaceServiceClient("c2446f84b1eb486ca11e2f5d6e670878");
KinectSensor ks;
ColorFrameReader cfr;
byte[] colorData;
ColorImageFormat format;
WriteableBitmap wbmp;
BitmapSource bmpSource;
int imageSerial;
DispatcherTimer timer,timer2;
string streamF = "Frames//frame.jpg";
public MainWindow()
{
InitializeComponent();
ks = KinectSensor.GetDefault();
ks.Open();
var fd = ks.ColorFrameSource.CreateFrameDescription(ColorImageFormat.Bgra);
uint frameSize = fd.BytesPerPixel * fd.LengthInPixels;
colorData = new byte[frameSize];
format = ColorImageFormat.Bgra;
imageSerial = 0;
cfr = ks.ColorFrameSource.OpenReader();
cfr.FrameArrived += cfr_FrameArrived;
}
void cfr_FrameArrived(object sender, ColorFrameArrivedEventArgs e)
{
if (e.FrameReference == null) return;
using (ColorFrame cf = e.FrameReference.AcquireFrame())
{
if (cf == null) return;
cf.CopyConvertedFrameDataToArray(colorData, format);
var fd = cf.FrameDescription;
// Creating BitmapSource
var bytesPerPixel = (PixelFormats.Bgr32.BitsPerPixel) / 8;
var stride = bytesPerPixel * cf.FrameDescription.Width;
bmpSource = BitmapSource.Create(fd.Width, fd.Height, 96.0, 96.0, PixelFormats.Bgr32, null, colorData, stride);
// WritableBitmap to show on UI
wbmp = new WriteableBitmap(bmpSource);
FacePhoto.Source = wbmp;
}
}
private void SaveImage(BitmapSource image)
{
try
{
FileStream stream = new System.IO.FileStream(#"Frames\frame.jpg", System.IO.FileMode.OpenOrCreate);
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.FlipHorizontal = true;
encoder.FlipVertical = false;
encoder.QualityLevel = 30;
encoder.Frames.Add(BitmapFrame.Create(image));
encoder.Save(stream);
stream.Close();
}
catch (Exception)
{
}
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
timer.Tick += Timer_Tick;
timer.Start();
timer2 = new DispatcherTimer { Interval = TimeSpan.FromSeconds(5) };
timer2.Tick += Timer2_Tick;
timer2.Start();
}
private void Timer_Tick(object sender, EventArgs e)
{
SaveImage(bmpSource);
}
private async void Timer2_Tick(object sender, EventArgs e)
{
Title = "Detecting...";
FaceRectangle[] faceRects = await UploadAndDetectFaces(streamF);
Face[] faceAttributes = await UploadAndDetectFaceAttributes(streamF);
Title = String.Format("Detection Finished. {0} face(s) detected", faceRects.Length);
if (faceRects.Length > 0)
{
DrawingVisual visual = new DrawingVisual();
DrawingContext drawingContext = visual.RenderOpen();
drawingContext.DrawImage(bmpSource,
new Rect(0, 0, bmpSource.Width, bmpSource.Height));
double dpi = bmpSource.DpiX;
double resizeFactor = 96 / dpi;
foreach (var faceRect in faceRects)
{
drawingContext.DrawRectangle(
Brushes.Transparent,
new Pen(Brushes.Red, 2),
new Rect(
faceRect.Left * resizeFactor,
faceRect.Top * resizeFactor,
faceRect.Width * resizeFactor,
faceRect.Height * resizeFactor
)
);
}
drawingContext.Close();
RenderTargetBitmap faceWithRectBitmap = new RenderTargetBitmap(
(int)(bmpSource.PixelWidth * resizeFactor),
(int)(bmpSource.PixelHeight * resizeFactor),
96,
96,
PixelFormats.Pbgra32);
faceWithRectBitmap.Render(visual);
FacePhoto.Source = faceWithRectBitmap;
}
if (faceAttributes.Length > 0)
{
foreach (var faceAttr in faceAttributes)
{
Label lb = new Label();
//Canvas.SetLeft(lb, lb.Width);
lb.Content = faceAttr.FaceAttributes.Gender;// + " " + faceAttr.Gender + " " + faceAttr.FacialHair + " " + faceAttr.Glasses + " " + faceAttr.HeadPose + " " + faceAttr.Smile;
lb.FontSize = 50;
lb.Width = 200;
lb.Height = 100;
stack.Children.Add(lb);
}
}
}
private async Task<FaceRectangle[]> UploadAndDetectFaces(string imageFilePath)
{
try
{
using (Stream imageFileStream = File.OpenRead(imageFilePath))
{
var faces = await faceServiceClient.DetectAsync(imageFilePath);
var faceRects = faces.Select(face => face.FaceRectangle);
var faceAttrib = faces.Select(face => face.FaceAttributes);
return faceRects.ToArray();
}
}
catch (Exception)
{
return new FaceRectangle[0];
}
}
private async Task<Face[]> UploadAndDetectFaceAttributes(string imageFilePath)
{
try
{
using (Stream imageFileStream = File.Open(imageFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var faces = await faceServiceClient.DetectAsync(imageFileStream, true, true, new FaceAttributeType[] { FaceAttributeType.Gender, FaceAttributeType.Age, FaceAttributeType.Smile, FaceAttributeType.Glasses, FaceAttributeType.HeadPose, FaceAttributeType.FacialHair });
return faces.ToArray();
}
}
catch (Exception)
{
return new Face[0];
}
}
}
Above code worked well. But, I want to convert each frame of Kinect Color Feed directly to Stream and I have no idea how to do it though I searched but nothing worked for me. If Somebody can help me then it'll be great. Thanks!
Instead of persisting the frame to a file in SaveImage, you can persist it to a MemoryStream, rewind it (by calling Position = 0), and send that stream to DetectAsync().
Also note that in UploadAndDetectFaces, you should send imageFileStream, not imageFilePath, to DetectAsync(). You probably don't want to call both UploadAndDetectFaces and UploadAndDetectFaceAttributes anyway, since you're just doubling your work (and quota/rate-limit hit.)
I was trying to develop a Voice recorder in C#. I have tried many ways, like NAudio, DirectX, Microsoft.Xna.Framework.Audio, etc.
Everything gives the same result. After we stop the recording, the output file mp3/wav get saved.
The mp3/wav file get created at the beginning itself (without and content - 0 bytes)
I am trying to create an application which can save audio live/simultaneously.
private void StartRecording() {
this.WaveSource = new WaveInEvent { WaveFormat = new WaveFormat(44100, 1) };
this.WaveSource.DataAvailable += this.WaveSourceDataAvailable;
this.WaveSource.RecordingStopped += this.WaveSourceRecordingStopped;
this.WaveFile = new WaveFileWriter(#"C:\Sample.wav", this.WaveSource.WaveFormat);
this.WaveSource.StartRecording();
}
private void StopRecording() {
this.WaveSource.StopRecording();
}
void WaveSourceDataAvailable(object sender, WaveInEventArgs e) {
if (this.WaveFile != null) {
this.WaveFile.Write(e.Buffer, 0, e.BytesRecorded);
this.WaveFile.Flush();
}
}
void WaveSourceRecordingStopped(object sender, StoppedEventArgs e) {
if (this.WaveSource != null) {
this.WaveSource.Dispose();
this.WaveSource = null;
}
if (this.WaveFile != null) {
this.WaveFile.Dispose();
this.WaveFile = null;
}
}
I have solved the problem with NAudio library itself.
Few modification to the existing code.
public class Recorder {
WaveIn sourceStream;
WaveFileWriter waveWriter;
readonly String FilePath;
readonly String FileName;
readonly int InputDeviceIndex;
public Recorder(int inputDeviceIndex, String filePath, String fileName) {
InitializeComponent();
this.InputDeviceIndex = inputDeviceIndex;
this.FileName = fileName;
this.FilePath = filePath;
}
public void StartRecording(object sender, EventArgs e) {
sourceStream = new WaveIn {
DeviceNumber = this.InputDeviceIndex,
WaveFormat =
new WaveFormat(44100, WaveIn.GetCapabilities(this.InputDeviceIndex).Channels)
};
sourceStream.DataAvailable += this.SourceStreamDataAvailable;
if (!Directory.Exists(FilePath)) {
Directory.CreateDirectory(FilePath);
}
waveWriter = new WaveFileWriter(FilePath + FileName, sourceStream.WaveFormat);
sourceStream.StartRecording();
}
public void SourceStreamDataAvailable(object sender, WaveInEventArgs e) {
if (waveWriter == null) return;
waveWriter.Write(e.Buffer, 0, e.BytesRecorded);
waveWriter.Flush();
}
private void RecordEnd(object sender, EventArgs e) {
if (sourceStream != null) {
sourceStream.StopRecording();
sourceStream.Dispose();
sourceStream = null;
}
if (this.waveWriter == null) {
return;
}
this.waveWriter.Dispose();
this.waveWriter = null;
recordEndButton.Enabled = false;
Application.Exit();
Environment.Exit(0);
}
}
You can do this with DirectShow.
Take a look at Microsoft's documentation and the project's code samples to learn the best way to configure it according to your needs.
Wanna try to BASS NET?
There is a complete code for you task How to record sound and encode it to mp3? (C#!)
i am trying to take screenshot of page and save it as image. The page has several div tags and different contents in each div like one div tag has chart and the other might have gridview. So i am trying to take snapshot of the page ans save it as image. Can someone please help me here as i have googled and could not find any good resources about this. thanks.
The following seems to work. I got this from Convert webpage to image from ASP.NET
use:
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Threading;
using System.Windows.Forms;
public class WebsiteToImage
{
private Bitmap m_Bitmap;
private string m_Url;
private string m_FileName = string.Empty;
public WebsiteToImage(string url)
{
// Without file
m_Url = url;
}
public WebsiteToImage(string url, string fileName)
{
// With file
m_Url = url;
m_FileName = fileName;
}
public Bitmap Generate()
{
// Thread
var m_thread = new Thread(_Generate);
m_thread.SetApartmentState(ApartmentState.STA);
m_thread.Start();
m_thread.Join();
return m_Bitmap;
}
private void _Generate()
{
var browser = new WebBrowser { ScrollBarsEnabled = false };
browser.Navigate(m_Url);
browser.DocumentCompleted += WebBrowser_DocumentCompleted;
while (browser.ReadyState != WebBrowserReadyState.Complete)
{
Application.DoEvents();
}
browser.Dispose();
}
private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// Capture
var browser = (WebBrowser)sender;
browser.ClientSize = new Size(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);
browser.ScrollBarsEnabled = false;
m_Bitmap = new Bitmap(browser.Document.Body.ScrollRectangle.Width, browser.Document.Body.ScrollRectangle.Bottom);
browser.BringToFront();
browser.DrawToBitmap(m_Bitmap, browser.Bounds);
// Save as file?
if (m_FileName.Length > 0)
{
// Save
m_Bitmap.SaveJPG100(m_FileName);
}
}
}
public static class BitmapExtensions
{
public static void SaveJPG100(this Bitmap bmp, string filename)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
bmp.Save(filename, GetEncoder(ImageFormat.Jpeg), encoderParameters);
}
public static void SaveJPG100(this Bitmap bmp, Stream stream)
{
var encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
bmp.Save(stream, GetEncoder(ImageFormat.Jpeg), encoderParameters);
}
public static ImageCodecInfo GetEncoder(ImageFormat format)
{
var codecs = ImageCodecInfo.GetImageDecoders();
foreach (var codec in codecs)
{
if (codec.FormatID == format.Guid)
{
return codec;
}
}
// Return
return null;
}
}
To implement:
WebsiteToImage websiteToImage = new WebsiteToImage( "http://www.cnn.com", #"C:\Some Folder\Test.jpg");
websiteToImage.Generate();
Let's say I have 3 image views in my xaml . I am downloading images from a server & now I want to set those images in my image views . How can I do that ? Please Help !
My Code :
void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
//parse data
var container = DeserializeFromJson<DataJsonAttributeContainer>(e.Result);
//load into list
for (int i = 0; i < container.MyBookList.Count; i++)
{
newData[i] = new data();
newData[i].id = container.MyBookList[i].ID;
newData[i].title = container.MyBookList[i].TITLE;
newData[i].type = container.MyBookList[i].TYPE;
newData[i].price = container.MyBookList[i].PRICE;
newData[i].downloadLink = container.MyBookList[i].DOWNLOADLINK;
string file_name = newData[i].downloadLink.ToString();
string image_uri = "http://www.banglanews24.com/images/imgAll/" + file_name;
WebClient wc = new WebClient();
wc.OpenReadCompleted += new OpenReadCompletedEventHandler(wc_OpenReadCompleted);
wc.OpenReadAsync(new Uri(image_uri), wc);
}
void wc_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
if (e.Error == null && !e.Cancelled)
{
try
{ //I can set just one image here....what should I do ?
BitmapImage image = new BitmapImage();
image.SetSource(e.Result);
image1.Source = image;
}
catch (Exception ex)
{
//Exception handle appropriately for your app
}
}
else
{
//Either cancelled or error handle appropriately for your app
}
}
This should do it:
void webClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
//parse data
var container = DeserializeFromJson<DataJsonAttributeContainer>(e.Result);
//load into list
for (int i = 0; i < container.MyBookList.Count; i++)
{
newData[i] = new data();
newData[i].id = container.MyBookList[i].ID;
newData[i].title = container.MyBookList[i].TITLE;
newData[i].type = container.MyBookList[i].TYPE;
newData[i].price = container.MyBookList[i].PRICE;
newData[i].downloadLink = container.MyBookList[i].DOWNLOADLINK;
string file_name = newData[i].downloadLink.ToString();
string image_uri = "http://www.banglanews24.com/images/imgAll/" + file_name;
Uri uri = new Uri(image_uri, UriKind.Relative);
ImageSource imgSource = new BitmapImage(uri);
if (i==0) image1.source = imgSource;
else if (i==1) image2.source = imgSource;
else if (i==2) image3.source = imgSource;
etc
}
You will find that your images will automatically be downloaded when you give it a Image URI.