[高分]VB如何截取攝像頭圖像?

VB截取攝像頭圖像我可以給你三種方法：

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方案一：

簡單點(diǎn)到下面這個(gè)網(wǎng)站下載照相控件即可滿足你的需要。

takephoto.ocx照相控件

方案二：

另外，還可以下載攝像頭圖像顯示控件。vbgood.com上有一個(gè)攝像頭顯示用的ocx控件，下載下來把它放入你的Form里。

然后用WinAPI函數(shù)Bitblt 把攝像頭控件的HDC圖像，復(fù)制導(dǎo)Picture1.hDC即可顯示出來。這個(gè)方法代碼多些，但還算簡單。

方案三：

最復(fù)雜的是純粹調(diào)用WinAPI函數(shù)實(shí)現(xiàn)的攝像頭捕捉，好處是不依賴任何控件，對(duì)系統(tǒng)兼容性很好。但代碼復(fù)雜度較高看你的VB掌握水平了。

主要是使用以下兩個(gè)API函數(shù)。

Declare Function capCreateCaptureWindowA Lib "avicap32.dll" ( _

ByVal lpszWindowName As String, _

ByVal dwStyle As Long, _

ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Integer, _

ByVal hWndParent As Long, ByVal nID As Long) As Long

Declare Function capGetDriverDescriptionA Lib "avicap32.dll" ( _

ByVal wDriver As Integer, _

ByVal lpszName As String, _

ByVal cbName As Long, _

ByVal lpszVer As String, _

ByVal cbVer As Long) As Boolean

VB.NET 攝像頭編程求助

這是6.0的，.net的做些改動(dòng)就成！因?yàn)槲覜]裝攝像頭，就沒改！ Private Declare Function capCreateCaptureWindow Lib "avicap32.dll" _ Alias "capCreateCaptureWindowA" ( _ ByVal lpszWindowName As String, _ ByVal dwStyle As Long, _ ByVal x As Long, _ ByVal y As Long, _ ByVal nWidth As Long, _ ByVal nHeight As Long, _ ByVal hWndParent As Long, _ ByVal nID As Long) As Long Private Const WS_CHILD = H40000000 Private Const WS_VISIBLE = H10000000 Private Const WM_USER = H400 Private Const WM_CAP_START = H400 Private Const WM_CAP_EDIT_COPY = (WM_CAP_START + 30) Private Const WM_CAP_DRIVER_CONNECT = (WM_CAP_START + 10) Private Const WM_CAP_SET_PREVIEWRATE = (WM_CAP_START + 52) Private Const WM_CAP_SET_OVERLAY = (WM_CAP_START + 51) Private Const WM_CAP_SET_PREVIEW = (WM_CAP_START + 50) Private Const WM_CAP_DRIVER_DISCONNECT = (WM_CAP_START + 11) Private Declare Function SendMessage Lib "user32" _ Alias "SendMessageA" ( _ ByVal hwnd As Long, _ ByVal wMsg As Long, _ ByVal wParam As Long, _ lParam As Any) As Long Private Preview_Handle As Long Public Function CreateCaptureWindow( _ hWndParent As Long, _ Optional x As Long = 0, _ Optional y As Long = 0, _ Optional nWidth As Long = 320, _ Optional nHeight As Long = 240, _ Optional nCameraID As Long = 0) As Long Preview_Handle = capCreateCaptureWindow("Video", _ WS_CHILD + WS_VISIBLE, x, y, _ nWidth, nHeight, hWndParent, 1) SendMessage Preview_Handle, WM_CAP_DRIVER_CONNECT, nCameraID, 0 SendMessage Preview_Handle, WM_CAP_SET_PREVIEWRATE, 30, 0 SendMessage Preview_Handle, WM_CAP_SET_OVERLAY, 1, 0 SendMessage Preview_Handle, WM_CAP_SET_PREVIEW, 1, 0 CreateCaptureWindow = Preview_Handle End Function Public Function CapturePicture(nCaptureHandle As Long) As StdPicture Clipboard.Clear SendMessage nCaptureHandle, WM_CAP_EDIT_COPY, 0, 0 Set CapturePicture = Clipboard.GetData End Function Public Sub Disconnect(nCaptureHandle As Long, _ Optional nCameraID = 0) SendMessage nCaptureHandle, WM_CAP_DRIVER_DISCONNECT, _ nCameraID, 0 End Sub 4在form上添加一個(gè)PictureBox,一個(gè)按鈕,Caption設(shè)為 Save Pic Dim Video_Handle As Long Private Sub Form_Load() Video_Handle = CreateCaptureWindow(PicCapture.hwnd) End Sub Private Sub Command1_Click() Dim x As StdPicture Set x = CapturePicture(Video_Handle) SavePicture x, "c:\a.bmp" End Sub Private Sub Form_Unload(Cancel As Integer) Disconnect Video_Handle End Sub 追問： 可不可以幫忙寫為VB.NET的程序..?我自己運(yùn)行后顯示 未聲明 PicCapture 追問： nCameraID = 0 這里在VB.NET下也用不了Clipboard.GetData 在VB.NET里也要跟參數(shù)的..我自己試用VB可以的..希望你能幫忙寫一個(gè)VB.NET的..因?yàn)榫退銢]有攝像頭picturebox也會(huì)顯示黑色的 回答： 你這程序是工程用的！請(qǐng)加多點(diǎn)分！我給你改 追問： 可不可以加我QQ先344568960 因?yàn)槲曳e分不多...或許我可以給Q幣你怎么的~可以嗎？ 追問： 已經(jīng)補(bǔ)充了積分了~希望能幫忙改成VB.NET的吧~謝謝~ 回答： 建一個(gè)picturebox 和 button Imports System.Runtime.InteropServices Public Class Form1 Const WM_CAP_START = H400S Const WS_CHILD = H40000000 Const WS_VISIBLE = H10000000 Const WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10 Const WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11 Const WM_CAP_EDIT_COPY = WM_CAP_START + 30 Const WM_CAP_SEQUENCE = WM_CAP_START + 62 Const WM_CAP_FILE_SAVEAS = WM_CAP_START + 23 Const WM_CAP_SET_SCALE = WM_CAP_START + 53 Const WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52 Const WM_CAP_SET_PREVIEW = WM_CAP_START + 50 Const SWP_NOMOVE = H2S Const SWP_NOSIZE = 1 Const SWP_NOZORDER = H4S Const HWND_BOTTOM = 1 Dim hWnd As Integer Declare Function capGetDriverDescriptionA Lib "avicap32.dll" _ (ByVal wDriverIndex As Short, _ ByVal lpszName As String, ByVal cbName As Integer, _ ByVal lpszVer As String, _ ByVal cbVer As Integer) As Boolean Declare Function capCreateCaptureWindowA Lib "avicap32.dll" _ (ByVal lpszWindowName As String, ByVal dwStyle As Integer, _ ByVal x As Integer, ByVal y As Integer, _ ByVal nWidth As Integer, _ ByVal nHeight As Short, ByVal hWnd As Integer, _ ByVal nID As Integer) As Integer Declare Function SendMessage Lib "user32" Alias "SendMessageA" _ (ByVal hwnd As Integer, ByVal Msg As Integer, _ ByVal wParam As Integer, _ Runtime.InteropServices.MarshalAs(UnmanagedType.AsAny) ByVal lParam As Object) _ As Integer Declare Function SetWindowPos Lib "user32" Alias "SetWindowPos" _ (ByVal hwnd As Integer, _ ByVal hWndInsertAfter As Integer, ByVal x As Integer, _ ByVal y As Integer, _ ByVal cx As Integer, ByVal cy As Integer, _ ByVal wFlags As Integer) As Integer Declare Function DestroyWindow Lib "user32" _ (ByVal hndw As Integer) As Boolean Private Sub PreviewVideo(ByVal pbCtrl As PictureBox) hWnd = capCreateCaptureWindowA(0, _ WS_VISIBLE Or WS_CHILD, 0, 0, 0, _ 0, pbCtrl.Handle.ToInt32, 0) If SendMessage( _ hWnd, WM_CAP_DRIVER_CONNECT, _ 0, 0) Then SendMessage(hWnd, WM_CAP_SET_SCALE, True, 0) SendMessage(hWnd, WM_CAP_SET_PREVIEWRATE, 30, 0) SendMessage(hWnd, WM_CAP_SET_PREVIEW, True, 0) SetWindowPos(hWnd, HWND_BOTTOM, 0, 0, _ pbCtrl.Width, pbCtrl.Height, _ SWP_NOMOVE Or SWP_NOZORDER) Else DestroyWindow(hWnd) End If End Sub Private Sub Form1_Load( _ ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles MyBase.Load PreviewVideo(PictureBox1) End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim data As IDataObject Dim bmap As Image SendMessage(hWnd, WM_CAP_EDIT_COPY, 0, 0) data = Clipboard.GetDataObject() If data Is Nothing Then Exit Sub If data.GetDataPresent(GetType(System.Drawing.Bitmap)) Then bmap = CType(data.GetData(GetType( _ System.Drawing.Bitmap)), Image) bmap.Save("d:\a.bmp", System.Drawing.Imaging.ImageFormat.Bmp) MsgBox("完成") End If End Sub End Class

網(wǎng)上下的VB.NET截屏程序，試過好用，哪位大俠給詳細(xì)解釋一下！另外，怎么把截圖加載到Picturebox里？

VB.NT用的是觸發(fā)事件，一按就會(huì)觸發(fā)，要不你加個(gè)timer控件，延遲一秒

標(biāo)題的問題：你先把圖片保存，再加載

當(dāng)前文章：vb.net攝像頭截圖 vb攝像頭控件
轉(zhuǎn)載來源：http://jinyejixie.com/article46/ddogseg.html

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