Baumer工业相机堡盟相机如何使用JPEG图像压缩功能（LXT.JP系列相机图像压缩功能的使用和优点以及行业应用）（C++）

std::cout << "DEVICE PARAMETER SETUP" << std::endl;
std::cout << "######################" << std::endl << std::endl;
try {
    // SET TRIGGER MODE OFF (FreeRun)
    pDevice->GetRemoteNode("TriggerMode")->SetString("Off");
    std::cout << "         TriggerMode:             "
        << pDevice->GetRemoteNode("TriggerMode")->GetValue() << std::endl;
    // JPEGTAG01 (see description on top)
    // check for JPEG capable camera
    if (pDevice->GetRemoteNodeList()->GetNodePresent(kImageCompressionMode.c_str())) {
        BGAPI2::NodeMap* image_compression_map =
            pDevice->GetRemoteNode(kImageCompressionMode.c_str())->GetEnumNodeList();
        if (image_compression_map->GetNodePresent(kImageCompressionModeJPEG.c_str())) {
            jpeg_streaming_capable = true;
            std::cout << "         JPEG Supported:          Yes" << std::endl;
        } else {
            std::cout << "         JPEG Supported:          No, Feature '" <<
                kImageCompressionMode << "' has no element " <<
                kImageCompressionModeJPEG <<
                std::endl;
        }
    } else {
        std::cout << "         JPEG Supported:          No Feature '" <<
            kImageCompressionMode << "' not found." <<
            std::endl;
    }
    if (jpeg_streaming_capable) {
        // JPEGTAG02 (see description on top)
        // AND SET PIXELFORMAT (Mono8, YCbCr) IF AVAILABLE
        BGAPI2::NodeMap * pixel_format_enum_map = pDevice->GetRemoteNode("PixelFormat")->GetEnumNodeList();
        std::string pixel_format = "YCbCr422_8";
        if (!pixel_format_enum_map->GetNodePresent(pixel_format.c_str()) || 
            (pixel_format_enum_map->GetNodePresent(pixel_format.c_str()) && !pixel_format_enum_map->GetNode(pixel_format.c_str())->IsReadable())) {
            pixel_format = "Mono8";
            if (!pixel_format_enum_map->GetNodePresent(pixel_format.c_str()) ||
                (pixel_format_enum_map->GetNodePresent(pixel_format.c_str()) && !pixel_format_enum_map->GetNode(pixel_format.c_str())->IsReadable())) {
                pixel_format = "";
            }
        }
        if(!pixel_format.empty() && pDevice->GetRemoteNode("PixelFormat")->IsWriteable()) {
            pDevice->GetRemoteNode("PixelFormat")->SetString(pixel_format.c_str());
            std::cout << "         PixelFormat:             "
                << pDevice->GetRemoteNode("PixelFormat")->GetValue() << std::endl;
            // JPEGTAG03 (see description on top)
            // set the compression mode to JPEG
            pDevice->GetRemoteNode(kImageCompressionMode.c_str())->SetValue("JPEG");
        } else {
            std::cout << "         PixelFormat:             "
                << pDevice->GetRemoteNode("PixelFormat")->GetValue() << " (set to Mono8/YCbCr failed, not supported or no write accees)" << std::endl;
        }
    }
    std::cout << std::endl;
}
catch (BGAPI2::Exceptions::IException& ex) {
    returncode = (returncode == 0) ? 1 : returncode;
    std::cout << "ExceptionType:    " << ex.GetType() << std::endl;
    std::cout << "ErrorDescription: " << ex.GetErrorDescription() << std::endl;
    std::cout << "in function:      " << ex.GetFunctionName() << std::endl;
}

// CAPTURE 12 IMAGES
std::cout << " " << std::endl;
std::cout << "CAPTURE " << num_to_capture << " IMAGES BY IMAGE POLLING" << std::endl;
std::cout << "##################################" << std::endl << std::endl;
BGAPI2::Buffer * pBufferFilled = NULL;
try {
    // capture num_to_capture images
    for (unsigned int i = 0; i < num_to_capture; i++) {
        pBufferFilled = pDataStream->GetFilledBuffer(1000);  // timeout 1000 msec
        if (pBufferFilled == NULL) {
            std::cout << "Error: Buffer Timeout after 1000 msec" << std::endl;
        } else if (pBufferFilled->GetIsIncomplete() == true) {
            std::cout << "Error: Image is incomplete" << std::endl;
            pBufferFilled->QueueBuffer();
        } else {
            std::cout << " Image " << std::setw(5) << pBufferFilled->GetFrameID()
                << " received in memory address "
                << std::hex << pBufferFilled->GetMemPtr() << std::dec << std::endl;
            // JPEGTAG05 (see description on top)
            // save the compressed images to disk if supported
            if (jpeg_streaming_capable) {
                std::string jpeg_file = "022_JPEGCapture_";
                std::stringstream jpeg_filename;
                size_t jpeg_start_offset = pBufferFilled->GetImageOffset();
                size_t jpeg_end_offset = jpeg_start_offset + pBufferFilled->GetImageLength();
                if (jpeg_end_offset != 0) {
                    jpeg_filename.str("");
                    jpeg_filename << jpeg_file << std::setw(6) << std::setfill('0')
                        << pBufferFilled->GetFrameID() << ".jpg";
                    std::ofstream outfile;
                    outfile.open(jpeg_filename.str().c_str(), std::ios_base::binary);
                    outfile.write(
                        reinterpret_cast<const char*>(pBufferFilled->GetMemPtr()) + jpeg_start_offset,
                        jpeg_end_offset - jpeg_start_offset);
                    std::cout << "JPEG Data found. Image saved as JPEG file." << std::endl;
                } else {
                    std::cout << "JPEG Data not found in image buffer. No JPEG Saved." << std::endl;
                }
            }
            pBufferFilled->QueueBuffer();
        }
    }
}
catch (BGAPI2::Exceptions::IException& ex) {
    returncode = (returncode == 0) ? 1 : returncode;
    std::cout << "ExceptionType:    " << ex.GetType() << std::endl;
    std::cout << "ErrorDescription: " << ex.GetErrorDescription() << std::endl;
    std::cout << "in function:      " << ex.GetFunctionName() << std::endl;
}
std::cout << " " << std::endl;
std::cout << "CAMERA STOP" << std::endl;
std::cout << "###########" << std::endl << std::endl;