Griaule Biometrics

Returns a picture display handle (IPictureDisp) to the supplied raw grayscale fingerprint image.

Parameters

See also

• Fingerprint Image Format

Declaration

C++ .NET

int CapRawImageToHandle (ref object RawImage, int width, int height, int hdc, ref stdole.IPictureDisp handler)

C#

int CapRawImageToHandle (ref Object RawImage, int width, int height, int hdc, ref stdole.IPictureDisp handler)

VB6

Function CapRawImageToHandle (ByRef RawImage As Variant, ByVal width As Long, ByVal height As Long, ByVal hdc As Long, ByRef handler As IPictureDisp) As Long

VB .NET

Function CapRawImageToHandle (ByRef RawImage As Object, ByVal width As Integer, ByVal height As Integer, ByVal hdc As Integer, ByRef handler As stdole.IPictureDisp) As Integer

Delphi

function CapRawImageToHandle(var rawImage: OleVariant; width, height: integer; hdc: HDC; var handler: IPictureDisp): integer;

Sample Code

C++ .NET

stdole::IPictureDisp *handle;
// screen HDC
Graphics *g = _btEnroll->CreateGraphics();
IntPtr hdc = g->GetHdc();
_grfingerx->CapRawImageToHandle(&_raw->img, _raw->width, _raw->height, hdc.ToInt32(), &handle);
if (handle != NULL) {
  Image *curImage = System::Drawing::Image::FromHbitmap(handle->Handle);
  _pbPic->Image = curImage;
  _pbPic->Update();
}
g->ReleaseHdc(hdc);

C#

IPictureDisp handle = null;		
// screen HDC
IntPtr hdc = GetDC(System.IntPtr.Zero);
_grfingerx.CapRawImageToHandle(ref _raw.img,_raw.width,_raw.height, hdc.ToInt32(), ref handle);
// draw image on picture box
if (handle != null) 
{
	_pbPic.Image = GrFingerXSampleCS.
	ImageConverter.IpictureToImage(handle);
	_pbPic.Update();
}
ReleaseDC(System.IntPtr.Zero,hdc);

VB6

Dim handle As IPictureDisp
GrFingerXCtrl1.CapRawImageToHandle raw.img, raw.width, raw.height, formMain.hDC, handle
If Not (handle Is Nothing) Then
    img.Picture = handle
End If

VB .NET

' handle to finger image
Dim handle As stdole.IPictureDisp = Nothing
' screen HDC
Dim hdc = GetDC(0)
_GrFingerX.CapRawImageToHandle(raw.img, raw.width, raw.height, hdc, handle)
If Not (handle Is Nothing) Then
  _pbPic.Image = Image.FromHbitmap(New IntPtr(handle.Handle), New IntPtr(handle.hPal))
  _pbPic.Update()
End If
' release screen HDC
ReleaseDC(0, hdc)

Delphi

var
  // handle to finger image
  handle: IPictureDisp;
  // screen HDC
  hdc: LongInt;
begin
    GrFingerXCtrl1.CapRawImageToHandle(raw.img, raw.width, raw.height, hdc, handle);
if handle <> nil then
  begin
    SetOlePicture(image.Picture, handle);
    image.Repaint();
end;