攝影頭編程
❶ 如何使用MATLAB進行USB2.0攝像頭的編程
Matlab中的圖像獲取工具箱給我們提供了必要的函數，我們直接調用就可以了。在在這帖中我們主要就是簡單的介紹如何使用該工具箱進行對USB2.0攝像頭的編程
廢話不多說，我們開始言歸正傳了。但是一定記住你必須安裝了PC攝像頭才可以進行下面的東西，如果說首次安裝攝像頭最好重啟下PC，否則可能出現沒法識別攝像頭。
整個過程我們需要做如下幾件事情：
1、查詢USB2.0Camera 的具體參數(imaqhwinfo)
2、創建視頻輸入對象(videoinput)
3、圖像預覽和顯示(preview、stoppreview、closepreview和image)
4、獲取視頻圖像(getsnapshot)
5、圖像獲取設備的獲取和設置(get和set)
6、關閉視頻對象(delete)
在正式講解之前，我想說明下幾個個在圖像獲取工具箱中的術語：
圖像獲取設備：比如攝像頭、掃描儀
圖像獲取適配器：主要的目的是通過驅動在Matlab和圖像獲取設備之間傳遞信息
ROI：region-of-interest 感興趣區域
在說說幾個常用的函數，我們這里只是說明它的作用，具體如何使用參考幫助系統
getselectedsource
imaqfind
isvalid
peekdata
getdata
imaqmontage
給我們一個攝像頭我們必須知道他的相關參數，才可能進行我們的編程下。當然我們可以查詢商家手冊，但是那個累不累人呀。
Matlab的圖像獲取工具箱為我提供了imaqhwinfo()，來獲取PC上以安裝的圖像獲取硬體信息
❷ 在編程中怎樣調用攝像頭
在編程裡面想要調用了攝像頭的話，這個你可以給他編輯一個程序，然後就打開攝像頭就可以了。
❸ 嵌入式攝像頭編程要涉及到哪些知識
linux驅動和移植
❹ c# 攝像頭編程
建議你使用AVICap class API(avicap32.dll)來進行攝像頭編程,你用的是.net,所以請使用平台Invoke(P/Invoke)來使用該API.
給你點相關代碼:
1.
using System.Runtime.InteropServices;
2.
const int WM_CAP_START = 1024;
const int WS_CHILD = 1073741824;
const int WS_VISIBLE = 268435456;
const int WM_CAP_DRIVER_CONNECT = (WM_CAP_START + 10);
const int WM_CAP_DRIVER_DISCONNECT = (WM_CAP_START + 11);
const int WM_CAP_EDIT_COPY = (WM_CAP_START + 30);
const int WM_CAP_SEQUENCE = (WM_CAP_START + 62);
const int WM_CAP_FILE_SAVEAS = (WM_CAP_START + 23);
const int WM_CAP_SET_SCALE = (WM_CAP_START + 53);
const int WM_CAP_SET_PREVIEWRATE = (WM_CAP_START + 52);
const int WM_CAP_SET_PREVIEW = (WM_CAP_START + 50);
const int SWP_NOMOVE = 2;
const int SWP_NOSIZE = 1;
const int SWP_NOZORDER = 4;
const int HWND_BOTTOM = 1;
3.
//---capGetDriverDescription函數取得捕獲驅動的版本描述信息 [System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern bool capGetDriverDescriptionA(
short wDriverIndex, string lpszName,
int cbName, string lpszVer, int cbVer);
//---capCreateCaptureWindow函數建立一個捕獲窗口
[System.Runtime.InteropServices.DllImport("avicap32.dll")]
static extern int capCreateCaptureWindowA(
string lpszWindowName, int dwStyle, int x, int y,
int nWidth, short nHeight, int hWnd, int nID);
//---SendMessageA
[System.Runtime.InteropServices.DllImport(
"user32", EntryPoint = "SendMessageA")]
static extern int SendMessage(
int hwnd, int Msg, int wParam,
[MarshalAs(UnmanagedType.AsAny)] object lParam);
//---SetWindowPos
[System.Runtime.InteropServices.DllImport(
"user32", EntryPoint = "SetWindowPos")]
static extern int SetWindowPos(
int hwnd, int hWndInsertAfter, int x, int y,
int cx, int cy, int wFlags);
//--DestroyWindow
[System.Runtime.InteropServices.DllImport("user32")]
static extern bool DestroyWindow(int hndw);
4.
//---定義窗口句柄---
private int hWnd;
5.
private void Form1_Load(object sender, EventArgs e)
{
if (serialPort.IsOpen)
{
serialPort.Close();
}
try
{
//---配置串口參數
serialPort.PortName = "COM3";
serialPort.BaudRate = 9600;
serialPort.Parity = System.IO.Ports.Parity.None;
serialPort.DataBits = 8;
serialPort.StopBits = System.IO.Ports.StopBits.One;
serialPort.Handshake = System.IO.Ports.Handshake.None;
serialPort.DataReceived +=
new
System.IO.Ports.(
DataReceived);
//打開串口
serialPort.Open();
serialPort.DiscardInBuffer();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
//視頻顯示
PreviewVideo(PictureBox1);
}
6.
private void PreviewVideo(PictureBox pbCtrl)
{
hWnd = capCreateCaptureWindowA(
"0", WS_VISIBLE | WS_CHILD, 0, 0, 0, 0,
pbCtrl.Handle.ToInt32(), 0);
if (SendMessage(hWnd, WM_CAP_DRIVER_CONNECT, 0, 0) != 0)
{
//---set the preview scale---
SendMessage(hWnd, WM_CAP_SET_SCALE, 1, 0);
//---set the preview rate (ms)---
SendMessage(hWnd, WM_CAP_SET_PREVIEWRATE, 30, 0);
//---start previewing the image---
SendMessage(hWnd, WM_CAP_SET_PREVIEW, 1, 0);
//---resize window to fit in PictureBox control---
SetWindowPos(hWnd, HWND_BOTTOM, 0, 0,
pbCtrl.Width, pbCtrl.Height,
SWP_NOMOVE | SWP_NOZORDER);
}
else
{
//錯誤連接
DestroyWindow(hWnd);
}
}
❺ linux下怎麼樣進行攝像頭編程
在linux下所有設備都是文件。所以對攝像頭的操作其實就是對文件的操作。USB攝像頭的設備文件就是在/dev目錄下的video0(假如只有一個攝像頭)。在linux下操作攝像頭就是使用v4l2對攝像頭進行的操作，操作步驟如下
打開設備文件。
int fd=open(」/dev/video0″,O_RDWR);
2. 取得設備的capability，看看設備具有什麼功能，比如是否具有輸入,或者音頻輸入輸出等。VIDIOC_QUERYCAP,struct v4l2_capability
v4l2_std_id std;
do {
ret= ioctl(fd, VIDIOC_QUERYSTD, std);
} while (ret == -1 errno == EAGAIN);
switch (std) {
case V4L2_STD_NTSC:
//……
case V4L2_STD_PAL:
//……
}
3. 選擇輸入，一個設備可以有多個輸入。VIDIOC_S_INPUT,struct v4l2_input(可不要)
4. 設置的制式和幀格式，制式包括PAL，NTSC，幀的格式個包括寬度和高度等。
VIDIOC_S_STD,VIDIOC_S_FMT,struct v4l2_std_id,struct v4l2_format
struct v4l2_format fmt;
memset ( fmt, 0, sizeof(fmt) );
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = 320;
fmt.fmt.pix.height = 240;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG;
if (ioctl(fd, VIDIOC_S_FMT, fmt) < 0）
{
printf("set format failed ");
//return 0;
}
5. 向驅動申請幀緩沖，一般不超過5個。struct v4l2_requestbuffers
struct v4l2_requestbuffers req;
memset(req, 0, sizeof (req));
req.count = 4;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
if (ioctl(fd,VIDIOC_REQBUFS,req) == -1)
{
perror("VIDIOC_REQBUFS error ");
//return -1;
}
6.申請物理內存
將申請到的幀緩沖映射到用戶空間，這樣就可以直接操作採集到的幀了，而不必去復制。將申請到的幀緩沖全部入隊列，以便存放採集到的數據.VIDIOC_QBUF,struct v4l2_buffer
VideoBuffer* buffers = calloc( req.count, sizeof(VideoBuffer) );
printf("sizeof(VideoBuffer) is %d ",sizeof(VideoBuffer));
struct v4l2_buffer buf;
for (numBufs = 0; numBufs < req.count; numBufs++)
{
memset( buf, 0, sizeof(buf) );
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = numBufs;
if (ioctl(fd, VIDIOC_QUERYBUF, buf) < 0)
{
printf("VIDIOC_QUERYBUF error ");
//return -1;
}
printf("buf len is %d ",sizeof(buf));
//內存映射
buffers[numBufs].length = buf.length;
buffers[numBufs].offset = (size_t) buf.m.offset;
buffers[numBufs].start = mmap (NULL, buf.length,PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
printf("buffers.length = %d,buffers.offset = %d ,buffers.start[0] = %d ",buffers[numBufs].length,buffers[numBufs].offset,buffers[numBufs].start[0]);
printf("buf2 len is %d ",sizeof(buffers[numBufs].start));
if (buffers[numBufs].start == MAP_FAILED)
{
perror("buffers error ");
//return -1;
}
if (ioctl (fd, VIDIOC_QBUF, buf) < 0)
{
printf("VIDIOC_QBUF error ");
//return -1;
}
}
7. 開始的採集。
enum v4l2_buf_type type;
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ioctl (fd, VIDIOC_STREAMON, type) < 0)
{
printf("VIDIOC_STREAMON error ");
// return -1;
}
8. 出隊列以取得已採集數據的幀緩沖，取得原始採集數據。VIDIOC_DQBUF, 將緩沖重新入隊列尾,這樣可以循環採集。VIDIOC_QBUF
if (ioctl(fd, VIDIOC_DQBUF, buf) < 0)
{
perror("VIDIOC_DQBUF failed. ");
//return -1;
}
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
unsigned char *ptcur = buffers[numBufs].start;
DEBUG("buf.bytesused = %d ",buf.bytesused);
int i1;
for(i1=0; i1<buf.bytesused; i1++)
{
if((buffers[numBufs].start[i1] == 0xFF) (buffers[numBufs].start[i1+1] == 0xC4))
{
DEBUG("huffman table finded! buf.bytesused = %d FFC4 = %d ",buf.bytesused,i1);
break;
}
}
if(i1 == buf.bytesused)printf("huffman table don't exist! ");
int i;
for(i=0; i<buf.bytesused; i++)
{
if((buffers[numBufs].start[i] == 0xFF) (buffers[numBufs].start[i+1] == 0xD8)) break;
ptcur++;
}
DEBUG("i=%d,FF=%02x,D8=%02x ",i,buffers[numBufs].start[i],buffers[numBufs].start[i+1]);
int imagesize =buf.bytesused - i;
DEBUG("buf.bytesused = %d ",buf.bytesused);
DEBUG ("imagesize = %d ",imagesize);
9. 停止的採集。VIDIOC_STREAMOFF
10. 關閉設備。close(fd);
❻ 如何編程使網路攝像頭監測有東西在移動
這應該說圖像檢測和處理的內容。很多圖書把它歸為人工智慧的范疇。
我有一個思路供你參考。
如果攝像頭是固定的話，那它拍攝的背景是相同的。
攝像機就是連續快速拍攝的照相機。
攝像頭以每秒若干張照片的速度拍攝。
這些照片顯示的應該是連續的畫面。
而檢測畫面是否在運動，就是比較前後兩張圖片是否存在差異。
以上是基本思路，程序可以直接從攝像頭上獲取圖像信息，也可從視頻文件中獲取圖像信息。
不過在實際實現上還是有改進的地方，
比如是檢測前後兩張圖片的話，檢測的敏感程度太高了。
比如，攝像頭前飛來一隻蚊子，它也能察覺到，而你也許只想看到是否有人或車輛在動。或者背景上有一些植物在動，而這不是你需要。
可以對這個規則進行適當修改。
比如檢測前後連續若干張圖片，如果圖片的差異度不大的話，算做沒有差異。
以及兩張圖片之間的差異度如何計算都可以適當規定。
❼ linux下怎樣進行攝像頭編程
在linux下所有設備都是文件。所以對攝像頭的操作其實就是對文件的操作。USB攝像頭的設備文件就是在/dev目錄下的video0(假如只有一個攝像頭)。在linux下操作攝像頭就是使用v4l2對攝像頭進行的操作，操作步驟如下
打開設備文件。
int fd=open(」/dev/video0″,O_RDWR);
2. 取得設備的capability，看看設備具有什麼功能，比如是否具有輸入,或者音頻輸入輸出等。VIDIOC_QUERYCAP,struct v4l2_capability
v4l2_std_id std;
do {
ret= ioctl(fd, VIDIOC_QUERYSTD, std);
} while (ret == -1 errno == EAGAIN);
switch (std) {
case V4L2_STD_NTSC:
//……
case V4L2_STD_PAL:
//……
}
3. 選擇輸入，一個設備可以有多個輸入。VIDIOC_S_INPUT,struct v4l2_input(可不要)
4. 設置的制式和幀格式，制式包括PAL，NTSC，幀的格式個包括寬度和高度等。
VIDIOC_S_STD,VIDIOC_S_FMT,struct v4l2_std_id,struct v4l2_format
struct v4l2_format fmt;
memset ( fmt, 0, sizeof(fmt) );
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
fmt.fmt.pix.width = 320;
fmt.fmt.pix.height = 240;
fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG;
if (ioctl(fd, VIDIOC_S_FMT, fmt) < 0）
{
printf("set format failed ");
//return 0;
}
5. 向驅動申請幀緩沖，一般不超過5個。struct v4l2_requestbuffers
struct v4l2_requestbuffers req;
memset(req, 0, sizeof (req));
req.count = 4;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
if (ioctl(fd,VIDIOC_REQBUFS,req) == -1)
{
perror("VIDIOC_REQBUFS error ");
//return -1;
}
6.申請物理內存
將申請到的幀緩沖映射到用戶空間，這樣就可以直接操作採集到的幀了，而不必去復制。將申請到的幀緩沖全部入隊列，以便存放採集到的數據.VIDIOC_QBUF,struct v4l2_buffer
VideoBuffer* buffers = calloc( req.count, sizeof(VideoBuffer) );
printf("sizeof(VideoBuffer) is %d ",sizeof(VideoBuffer));
struct v4l2_buffer buf;
for (numBufs = 0; numBufs < req.count; numBufs++)
{
memset( buf, 0, sizeof(buf) );
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = numBufs;
if (ioctl(fd, VIDIOC_QUERYBUF, buf) < 0)
{
printf("VIDIOC_QUERYBUF error ");
//return -1;
}
printf("buf len is %d ",sizeof(buf));
//內存映射
buffers[numBufs].length = buf.length;
buffers[numBufs].offset = (size_t) buf.m.offset;
buffers[numBufs].start = mmap (NULL, buf.length,PROT_READ | PROT_WRITE, MAP_SHARED, fd, buf.m.offset);
printf("buffers.length = %d,buffers.offset = %d ,buffers.start[0] = %d ",buffers[numBufs].length,buffers[numBufs].offset,buffers[numBufs].start[0]);
printf("buf2 len is %d ",sizeof(buffers[numBufs].start));
if (buffers[numBufs].start == MAP_FAILED)
{
perror("buffers error ");
//return -1;
}
if (ioctl (fd, VIDIOC_QBUF, buf) < 0)
{
printf("VIDIOC_QBUF error ");
//return -1;
}
}
7. 開始的採集。
enum v4l2_buf_type type;
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (ioctl (fd, VIDIOC_STREAMON, type) < 0)
{
printf("VIDIOC_STREAMON error ");
// return -1;
}
8. 出隊列以取得已採集數據的幀緩沖，取得原始採集數據。VIDIOC_DQBUF, 將緩沖重新入隊列尾,這樣可以循環採集。VIDIOC_QBUF
if (ioctl(fd, VIDIOC_DQBUF, buf) < 0)
{
perror("VIDIOC_DQBUF failed. ");
//return -1;
}
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
unsigned char *ptcur = buffers[numBufs].start;
DEBUG("buf.bytesused = %d ",buf.bytesused);
int i1;
for(i1=0; i1<buf.bytesused; i1++)
{
if((buffers[numBufs].start[i1] == 0xFF) (buffers[numBufs].start[i1+1] == 0xC4))
{
DEBUG("huffman table finded! buf.bytesused = %d FFC4 = %d ",buf.bytesused,i1);
break;
}
}
if(i1 == buf.bytesused)printf("huffman table don't exist! ");
int i;
for(i=0; i<buf.bytesused; i++)
{
if((buffers[numBufs].start[i] == 0xFF) (buffers[numBufs].start[i+1] == 0xD8)) break;
ptcur++;
}
DEBUG("i=%d,FF=%02x,D8=%02x ",i,buffers[numBufs].start[i],buffers[numBufs].start[i+1]);
int imagesize =buf.bytesused - i;
DEBUG("buf.bytesused = %d ",buf.bytesused);
DEBUG ("imagesize = %d ",imagesize);
9. 停止的採集。VIDIOC_STREAMOFF
10. 關閉設備。close(fd);
❽ VB.NET 攝像頭編程求助
這是6.0的，.net的做些改動就成！因為我沒裝攝像頭，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PictureBox,一個按鈕,Caption設為 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..?我自己運行後顯示 未聲明 PicCapture 追問： nCameraID = 0 這里在VB.NET下也用不了Clipboard.GetData 在VB.NET里也要跟參數的..我自己試用VB可以的..希望你能幫忙寫一個VB.NET的..因為就算沒有攝像頭picturebox也會顯示黑色的 回答： 你這程序是工程用的！請加多點分！我給你改 追問： 可不可以加我QQ先344568960 因為我積分不多...或許我可以給Q幣你怎麼的~可以嗎？ 追問： 已經補充了積分了~希望能幫忙改成VB.NET的吧~謝謝~ 回答： 建一個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
❾ c語言進行攝像頭編程需要學些什麼
directshow/avicapture/opencv幾種都可以實現，好好學這幾方面吧 ，不對，弄清楚其中一種先。但是，基本語法知識就有點...C知識先搞清楚。
❿ 如何實現在電腦上編程實現對攝像頭的控制
你說的是對對方的攝像頭進行控制嗎？
這個常人做不到的 因為你要建立一個連接，也就相當於你是伺服器，你還得打開一個通往他的埠，還要越過對方的防火牆和殺毒軟體
你如果沒有C++基礎可以用易語言弄，不過太麻煩了