您好，我使用opencv从我的默认相机获取网络摄像头供稿，并且希望将它显示在我的窗体上的一个图片框中。 我的网络摄像头出现故障，但由于某种原因，该馈送从未显示在我的照片箱中。 请有人帮忙指出/解决问题，因为我现在被困在这里。 提前致谢。
在myform.h中，我有这个代码将图片框发送到myform.cpp文件：
System::Windows::Forms::PictureBox^ mypicbox1(void)
{
opencv_gui::MyForm aform;
return aform.pictureBox1;
}
和代码绘制得到videofeed并放入myform.cpp我的图片框是：
void opencv_gui::DrawCvImage(const cv::Mat& cvImage)
{
System::Windows::Forms::PictureBox^ pictureBox = mypicbox1();
// only color images are supported
assert(cvImage.type() == CV_8UC3);
if ((pictureBox->Image == nullptr) || (pictureBox->Width != cvImage.cols) || (pictureBox->Height != cvImage.rows))
{
pictureBox->Width = cvImage.cols;
pictureBox->Height = cvImage.rows;
pictureBox->Image = gcnew System::Drawing::Bitmap(cvImage.cols, cvImage.rows);
}
// Create System::Drawing::Bitmap from cv::Mat
System::Drawing::Bitmap^ bmpImage = gcnew System::Drawing::Bitmap(
cvImage.cols, cvImage.rows, cvImage.step,
System::Drawing::Imaging::PixelFormat::Format24bppRgb,
System::IntPtr(cvImage.data)
);
// Draw Bitmap over a PictureBox
System::Drawing::Graphics^ g = System::Drawing::Graphics::FromImage(pictureBox->Image);
g->DrawImage(bmpImage, 0, 0, cvImage.cols, cvImage.rows);
pictureBox->Refresh();
delete g;
}
//camera feed
int opencv_gui::video_cap(void)
{
VideoCapture cap;
if (!cap.open(0)) // open the default camera (camera 0), use something different from 0 otherwise;
return 0;
for (;;)
{
Mat frame;
cap >> frame;
if (frame.empty()) break; // end of video stream
DrawCvImage(frame);
if (waitKey(10) == 27) break; // stop capturing by pressing ESC
}
// the camera will be closed automatically upon exit
// cap.close();
return 0;
}
这是我的调试日志：我使用了像“>>>>>>>”这样的箭头来显示重要的参数，并使用“RED >>>>>>>”来显示错误参数。
cvImage {flags = 1124024336 dims = 2 rows = 480 ...} cv :: Mat＆ 分配器0x0000000000000000 cv :: MatAllocator * cols 640 int
数据0x0000026AC2146F80无符号字符* *（* cvImage）.data 0''无符号字符
数据结束0x0000026AC2227F80无符号字符* 数据限制0x0000026AC2227F80无符号字符* 数据存储0x0000026AC2146F80无符号字符* dims 2 int标志1124024336 int行480 int 大小{p = 0x000000DBDFF0DE80} cv :: MatSize
p 0x000000DBDFF0DE80 int * *（* cvImage）.size.p 0 int
步骤{p = 0x000000DBDFF0DEC8 buf = {Length = 2}} cv :: MatStep buf {Length = 2} unsigned __int64 [] p 0x000000DBDFF0DEC8 unsigned __int64 * 你0x0000026AA4814780 cv :: UMatData * RED >>>>>>> bmpImage 0x0000026aa62a1fd0 {defaultTransparentColor =} System :: Drawing :: Bitmap ^ RED >>>>>>> System :: Drawing :: Image ^ 0x0000026aa62a1fd0 {nativeImage = 2657511292512 rawData = userData =} System :: Drawing :: Image ^ defaultTransparentColor System :: Drawing :: Color g System :: Drawing :: Graphics ^ RED >>>>>>> pictureBox 0x0000026aa62a1388 {borderStyle = System :: Windows :: Forms :: BorderStyle :: None image = 0x0000026aa62a1fa0 sizeMode = System :: Windows :: Forms :: PictureBoxSizeMode :: Normal ...}系统： ：视窗：形式：图片框^ RED >>>>>>> System :: Windows :: Forms :: Control ^ 0x0000026aa62a1388 {ControlKeyboardRouting = PaletteTracing = FocusTracing = ...} System :: Windows :: Forms :: Control ^ AllowDrop false bool BorderStyle System :: Windows :: Forms :: BorderStyle :: None System :: Windows :: Forms :: BorderStyle CausesValidation true bool CreateParams 0x0000026aa62a15d8 {className = caption = style = 1442840576 ...} System :: Windows :: Forms :: CreateParams ^ DefaultImeMode System :: Windows :: Forms :: ImeMode :: Disable System :: Windows :: Forms :: ImeMode DefaultSize {Width = 100 Height = 50} System :: Drawing :: Size EVENT_SIZEMODECHANGED 0x0000026aa629af50 System :: Object ^ ErrorImage 0x0000026aa629b110 {nativeImage = 2657511192608 rawData = userData =} System :: Drawing :: Image ^ 字体0x0000026aa6280148 {} System :: Drawing :: Font ^ ForeColor {RGB = 0x0} System :: Drawing :: Color 图片0x0000026aa62a1fa0 {nativeImage = 2657511290992 rawData = userData =} System :: Drawing :: Image ^ [System :: Drawing :: Bitmap ^] 0x0000026aa62a1fa0 {defaultTransparentColor =} System :: Drawing :: Bitmap ^ System :: MarshalByRefObject ^ 0x0000026aa62a1fa0 {__identity =} System :: MarshalByRefObject ^ Flags 2 int FrameDimensionsList {Length = 1} array ^ Height 480 int HorizontalResolution 96.000000 float 调色板0x0000026aa62a25e8 {flags = 1129621568 entries = {Length = 0}} System :: Drawing :: Imaging :: ColorPalette ^ PhysicalDimension {width = 640.00000 height = 480.00000} System :: Drawing :: SizeF PixelFormat System :: Drawing :: Imaging :: PixelFormat :: Format32bppArgb System :: Drawing :: Imaging :: PixelFormat PropertyIdList {Length = 0} array ^ PropertyItems {长度= 0}数组^ RawFormat 0x0000026aa62a3488 {...} System :: Drawing :: Imaging :: ImageFormat ^ 大小{Width = 640 Height = 480} System :: Drawing :: Size Tag System :: Object ^ VerticalResolution 96.000000 float Width 640 int nativeImage 2657511290992 __int64 rawData array ^ userData System :: Object ^ ImageLocation System :: String ^ ImageRectangle {X = 0 Y = 0 Width = 640 Height = 480} System :: Drawing :: Rectangle ImeMode System :: Windows :: Forms :: ImeMode :: Disable System :: Windows :: Forms :: ImeMode InitialImage 0x0000026aa629c568 {nativeImage = 2657511196256 RAWDATA = USERDATA =}系统::绘图::图片^ PICTUREBOXSTATE_asyncOperationInProgress 1 INT PICTUREBOXSTATE_cancellationPending 2 INT PICTUREBOXSTATE_inInitialization 64 INT PICTUREBOXSTATE_needToLoadImageLocation 32 INT PICTUREBOXSTATE_useDefaultErrorImage 8 INT PICTUREBOXSTATE_useDefaultInitialImage 4 INT PICTUREBOXSTATE_waitOnLoad 16 INT从右至左系统：视窗：形式： RightToLeft :: No System :: Windows :: Forms :: RightToLeft SizeMode System :: Windows :: Forms :: PictureBoxSizeMode :: Normal System :: Windows :: Forms :: PictureBoxSizeMode TabIndex 1 int TabStop false bool Text“”System :: String ^ WaitOnLoad false bool borderStyle System :: Windows :: Forms :: BorderStyle :: None System :: Windows :: Forms :: BorderStyle contentLength 0 int currentAsyncLoadOperation System :: ComponentModel :: AsyncOperation ^ currentlyAnimating false bool defaultErrorImage 0x0000026aa629b110 {nativeImage = 2657511192608 rawData = userData =} System :: Drawing :: Image ^ defaultErrorImageForThread 0x0000026aa629b110 {nativeImage = 2657511192608 rawData = userData =} System :: Drawing :: Image ^ defaultErrorImageKey 0x0000026aa629af08 System :: Object ^ defaultInitialImage 0x0000026aa629c568 {nativeImage = 2657511196256 rawData = userData =} System :: Drawing :: Image ^ defaultInitialImageForThread 0x0000026aa629c568 {nativeImage = 2657511196256 rawData = userData =} System :: Drawing :: Image ^ defaultInitialImageKey 0x0000026aa629aef0 System :: Object ^ errorImage 0x0000026aa629b110 {nativeImage = 2657511192608 rawData = userData =} System :: Drawing :: Image ^ handleValid false bool image 0x0000026aa62a1fa0 {nativeImage = 2657511290992 rawData = userData =} System :: Drawing :: Image ^ imageInstallationType ImageInstallationType :: DirectlySpecified ImageInstallationType imageLocation System :: String ^ initialImage 0x0000026aa629c568 {nativeImage = 2657511196256 rawData = userData =} System :: Drawing :: Image ^ [System :: Drawing :: Bitmap ^] 0x0000026aa629c568 {defaultTransparentColor =} System :: Drawing :: Bitmap ^ System :: MarshalByRefObject ^ 0x0000026aa629c568 {__identity =} System :: MarshalByRefObject ^标志73744 int FrameDimensionsList {Length = 1} array ^ Height 16 int HorizontalResolution 96.000000 float RED >>>>>>>调色板0x0000026aa629ea60 {flags = 951278840 entries = {Length = 0}} System :: Drawing :: Imaging :: ColorPalette ^ PhysicalDimension {width = 14.000000 height = 16.000000} System :: Drawing :: SizeF PixelFormat System :: Drawing :: Imaging :: PixelFormat :: Format24bppRgb System :: Drawing :: Imaging :: PixelFormat PropertyIdList {Length = 0} array ^ PropertyItems {长度= 0}数组^ RED >>>>>>> RawFormat 0x0000026aa629f900 {...} System :: Drawing :: Imaging :: ImageFormat ^ Size {Width = 14 Height = 16} System :: Drawing :: Size Tag System :: Object ^ VerticalResolution 96.000000 float Width 14 int nativeImage 2657511196256 __int64 rawData array ^ userData System :: Object ^ RED >>>>>>> internalSyncObject 0x0000026aa629d900 System :: Object ^ loadCompletedDelegate System :: Threading :: SendOrPostCallback ^ loadCompletedKey 0x0000026aa629af20 System :: Object ^ loadProgressChangedKey 0x0000026aa629af38 System :: Object ^ loadProgressDelegate System :: Threading :: SendOrPostCallback ^ localImageStreamReader System :: IO :: StreamReader ^ pictureBoxState {data = 12} System :: Collections :: Specialized :: BitVector32 readBlockSize 4096 int readBuffer array ^ savedSize {Width = 640 Height = 480} System :: Drawing :: Size sizeMode System :: Windows :: Forms :: PictureBoxSizeMode :: Normal System :: Windows :: Forms :: PictureBoxSizeMode tempDownloadStream System :: IO :: MemoryStream ^ totalBytesRead 0 int uriImageStream System :: IO :: Stream ^
不得不编辑我的代码，但我几乎解决了我的问题，使用这里提供的答案：https://stackoverflow.com/a/12628861/5728859
尝试这个
private: System::Void button2_MouseClick(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e)
{
if (button2->Text == "Stop")
{
button2->Text = "Start";
}
else if (button2->Text == "Start")
{
button2->Text = "Stop";
}
VideoCapture capture(0);
Mat frame;
while (button2->Text == "Stop")
{
capture.read(frame);
System::Drawing::Graphics^ graphics2 = pictureBox1->CreateGraphics();
System::IntPtr ptr2(frame.ptr());
System::Drawing::Bitmap^ b2 = gcnew System::Drawing::Bitmap(frame.cols,
frame.rows, frame.step, System::Drawing::Imaging::PixelFormat::Format24bppRgb, ptr2);
System::Drawing::RectangleF rect2(0, 0, pictureBox1->Width, pictureBox1->Height);
graphics2->DrawImage(b2, rect2);
}
}
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