Exposure_CSharp¶
Exposure_CSharp.cs shows how to set a custom exposure time on a device. It relies on information provided in the Enumeration_CSharp, Acquisition_CSharp, and NodeMapInfo_CSharp examples.
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/**
* @example Exposure_CSharp.cs
*
* @brief Exposure_CSharp.cs shows how to set a custom exposure time on a
* device. It relies on information provided in the Enumeration_CSharp,
* Acquisition_CSharp, and NodeMapInfo_CSharp examples.
*
* This example shows the processes of preparing the camera, setting a custom
* exposure time, and restoring the camera to a normal state (without power
* cycling). Ensuring custom values do not fall out of range is also touched
* on in the configuration.
*
* Following this, we suggest familiarizing yourself with the
* ImageFormatControl_CSharp example if you haven't already.
* ImageFormatControl_CSharp is another example on camera customization that
* is shorter and simpler than many of the others. Once comfortable with
* Exposure_CSharp and ImageFormatControl_CSharp, we suggest checking out any
* of the longer, more complicated examples related to camera configuration:
* ChunkData_CSharp, LookupTable_CSharp, Sequencer_CSharp, or Trigger_CSharp.
*
* Please leave us feedback at: https://www.surveymonkey.com/r/TDYMVAPI
* More source code examples at: https://github.com/Teledyne-MV/Spinnaker-Examples
* Need help? Check out our forum at: https://teledynevisionsolutions.zendesk.com/hc/en-us/community/topics
*/
using System;
using System.IO;
using System.Collections.Generic;
using SpinnakerNET;
using SpinnakerNET.GenApi;
namespace Exposure_CSharp
{
class Program
{
// This function configures a custom exposure time. Automatic exposure
// is turned off in order to allow for the customization, and then the
// custom setting is applied.
int ConfigureExposure(INodeMap nodeMap)
{
int result = 0;
Console.WriteLine("\n\n*** CONFIGURING EXPOSURE ***\n");
try
{
//
// Turn off automatic exposure mode
//
// *** NOTES ***
// Automatic exposure prevents the manual configuration of
// exposure time and needs to be turned off.
//
// *** LATER ***
// Exposure time can be set automatically or manually as needed.
// This example turns automatic exposure off to set it manually
// and back on in order to return the camera to its default
// state.
//
IEnum iExposureAuto = nodeMap.GetNode<IEnum>("ExposureAuto");
if (iExposureAuto == null || !iExposureAuto.IsReadable || !iExposureAuto.IsWritable)
{
Console.WriteLine("Unable to disable automatic exposure (enum retrieval). Aborting...\n");
return -1;
}
IEnumEntry iExposureAutoOff = iExposureAuto.GetEntryByName("Off");
if (iExposureAutoOff == null || !iExposureAutoOff.IsReadable)
{
Console.WriteLine("Unable to disable automatic exposure (entry retrieval). Aborting...\n");
return -1;
}
iExposureAuto.Value = iExposureAutoOff.Value;
Console.WriteLine("Automatic exposure disabled...");
//
// Set exposure time manually; exposure time recorded in microseconds
//
// *** NOTES ***
// The node is checked for availability and writability prior
// to the setting of the node. Further, it is ensured that the
// desired exposure time does not exceed the maximum. Exposure
// time is counted in microseconds. This information can be
// found out either by retrieving the unit with the GetUnit()
// method or by checking SpinView.
//
const double exposureTimeToSet = 500000.0;
IFloat iExposureTime = nodeMap.GetNode<IFloat>("ExposureTime");
if (iExposureTime == null || !iExposureTime.IsReadable || !iExposureTime.IsWritable)
{
Console.WriteLine("Unable to set exposure time. Aborting...\n");
return -1;
}
// Ensure desired exposure time does not exceed the maximum
iExposureTime.Value = (exposureTimeToSet > iExposureTime.Max ? iExposureTime.Max : exposureTimeToSet);
Console.WriteLine("Exposure time set to {0} us...\n", iExposureTime.Value);
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
return result;
}
// This function returns the camera to its default state by re-enabling
// automatic exposure.
int ResetExposure(INodeMap nodeMap)
{
int result = 0;
try
{
//
// Turn automatic exposure back on
//
// *** NOTES ***
// It is recommended to have automatic exposure enabled
// whenever manual exposure settings are not required.
//
IEnum iExposureAuto = nodeMap.GetNode<IEnum>("ExposureAuto");
if (iExposureAuto == null || !iExposureAuto.IsReadable || !iExposureAuto.IsWritable)
{
Console.WriteLine("Unable to enable automatic exposure (enum retrieval). Aborting...\n");
return -1;
}
IEnumEntry iExposureAutoContinuous = iExposureAuto.GetEntryByName("Continuous");
if (iExposureAutoContinuous == null || !iExposureAutoContinuous.IsReadable)
{
Console.WriteLine("Unable to enable automatic exposure (entry retrieval). Aborting...\n");
return -1;
}
iExposureAuto.Value = iExposureAutoContinuous.Value;
Console.WriteLine("Automatic exposure enabled...\n");
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
return result;
}
// This function prints the device information of the camera from the
// transport layer; please see NodeMapInfo_CSharp example for more
// in-depth comments on printing device information from the nodemap.
static int PrintDeviceInfo(INodeMap nodeMap)
{
int result = 0;
try
{
Console.WriteLine("\n*** DEVICE INFORMATION ***\n");
ICategory category = nodeMap.GetNode<ICategory>("DeviceInformation");
if (category != null && category.IsReadable)
{
for (int i = 0; i < category.Children.Length; i++)
{
Console.WriteLine(
"{0}: {1}",
category.Children[i].Name,
(category.Children[i].IsReadable ? category.Children[i].ToString()
: "Node not available"));
}
Console.WriteLine();
}
else
{
Console.WriteLine("Device control information not available.");
}
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
return result;
}
// This function acquires and saves 10 images from a device; please see
// Acquisition_CSharp example for additional information on the steps
// in this function.
static int AcquireImages(IManagedCamera cam, INodeMap nodeMap, INodeMap nodeMapTLDevice)
{
int result = 0;
Console.WriteLine("\n*** IMAGE ACQUISITION ***\n");
try
{
// Set acquisition mode to continuous
IEnum iAcquisitionMode = nodeMap.GetNode<IEnum>("AcquisitionMode");
if (iAcquisitionMode == null || !iAcquisitionMode.IsReadable || !iAcquisitionMode.IsWritable)
{
Console.WriteLine("Unable to set acquisition mode to continuous (node retrieval). Aborting...\n");
return -1;
}
IEnumEntry iAcquisitionModeContinuous = iAcquisitionMode.GetEntryByName("Continuous");
if (iAcquisitionModeContinuous == null || !iAcquisitionModeContinuous.IsReadable)
{
Console.WriteLine(
"Unable to get acquisition mode to continuous (enum entry retrieval). Aborting...\n");
return -1;
}
iAcquisitionMode.Value = iAcquisitionModeContinuous.Symbolic;
Console.WriteLine("Acquisition mode set to continuous...");
// Begin acquiring images
cam.BeginAcquisition();
Console.WriteLine("Acquiring images...");
// Retrieve device serial number for filename
String deviceSerialNumber = "";
IString iDeviceSerialNumber = nodeMapTLDevice.GetNode<IString>("DeviceSerialNumber");
if (iDeviceSerialNumber != null && iDeviceSerialNumber.IsReadable)
{
deviceSerialNumber = iDeviceSerialNumber.Value;
Console.WriteLine("Device serial number retrieved as {0}...", deviceSerialNumber);
}
Console.WriteLine();
// Get the value of exposure time to set an appropriate timeout for GetNextImage
IFloat iExposureTime = nodeMap.GetNode<IFloat>("ExposureTime");
if (iExposureTime == null || !iExposureTime.IsReadable)
{
Console.WriteLine("Unable to read exposure time. Aborting...\n");
return -1;
}
// The exposure time is retrieved in µs so it needs to be converted to ms to keep consistency with the
// unit being used in GetNextImage
double timeout = iExposureTime.Value / 1000 + 1000;
// Retrieve, convert, and save images
const int NumImages = 5;
//
// Create ImageProcessor instance for post processing images
//
IManagedImageProcessor processor = new ManagedImageProcessor();
//
// Set default image processor color processing method
//
// *** NOTES ***
// By default, if no specific color processing algorithm is set, the image
// processor will default to NEAREST_NEIGHBOR method.
//
processor.SetColorProcessing(ColorProcessingAlgorithm.HQ_LINEAR);
for (int imageCnt = 0; imageCnt < NumImages; imageCnt++)
{
try
{
// Retrieve next received image and ensure image completion
// By default, GetNextImage will block indefinitely until an image arrives.
// In this example, the timeout value is set to [exposure time + 1000]ms to ensure that an image
// has enough time to arrive under normal conditions
using(IManagedImage rawImage = cam.GetNextImage((ulong) timeout))
{
if (rawImage.IsIncomplete)
{
Console.WriteLine("Image incomplete with image status {0}...", rawImage.ImageStatus);
}
else
{
// Print image information
Console.WriteLine(
"Grabbed image {0}, width = {1}, height = {1}",
imageCnt,
rawImage.Width,
rawImage.Height);
// Convert image to mono 8
using(
IManagedImage convertedImage = processor.Convert(rawImage, PixelFormatEnums.Mono8))
{
// Create unique file name
String filename = "Exposure-CSharp-";
if (deviceSerialNumber != "")
{
filename = filename + deviceSerialNumber + "-";
}
filename = filename + imageCnt + ".jpg";
// Save image
convertedImage.Save(filename);
Console.WriteLine("Image saved at {0}\n", filename);
}
}
}
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
}
// End acquisition
cam.EndAcquisition();
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
return result;
}
// This function acts as the body of the example; please see
// NodeMapInfo_CSharp example for more in-depth comments on setting up
// cameras.
int RunSingleCamera(IManagedCamera cam)
{
int result = 0;
int err = 0;
try
{
// Retrieve TL device nodemap and print device information
INodeMap nodeMapTLDevice = cam.GetTLDeviceNodeMap();
result = PrintDeviceInfo(nodeMapTLDevice);
// Initialize camera
cam.Init();
// Retrieve GenICam nodemap
INodeMap nodeMap = cam.GetNodeMap();
// Configure exposure
err = ConfigureExposure(nodeMap);
if (err < 0)
{
return err;
}
// Acquire images
result = result | AcquireImages(cam, nodeMap, nodeMapTLDevice);
// Reset exposure
result = result | ResetExposure(nodeMap);
// Deinitialize camera
cam.DeInit();
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
return result;
}
// Example entry point; please see Enumeration_CSharp example for more
// in-depth comments on preparing and cleaning up the system.
static int Main(string[] args)
{
int result = 0;
Program program = new Program();
// Since this application saves images in the current folder
// we must ensure that we have permission to write to this folder.
// If we do not have permission, fail right away.
FileStream fileStream;
try
{
fileStream = new FileStream(@"test.txt", FileMode.Create);
fileStream.Close();
File.Delete("test.txt");
}
catch
{
Console.WriteLine("Failed to create file in current folder. Please check permissions.");
Console.WriteLine("Press enter to exit...");
Console.ReadLine();
return -1;
}
// Retrieve singleton reference to system object
ManagedSystem system = new ManagedSystem();
// Print out current library version
LibraryVersion spinVersion = system.GetLibraryVersion();
Console.WriteLine(
"Spinnaker library version: {0}.{1}.{2}.{3}\n\n",
spinVersion.major,
spinVersion.minor,
spinVersion.type,
spinVersion.build);
// Retrieve list of cameras from the system
ManagedCameraList camList = system.GetCameras();
Console.WriteLine("Number of cameras detected: {0}\n\n", camList.Count);
// Finish if there are no cameras
if (camList.Count == 0)
{
// Clear camera list before releasing system
camList.Clear();
// Release system
system.Dispose();
Console.WriteLine("Not enough cameras!");
Console.WriteLine("Done! Press Enter to exit...");
Console.ReadLine();
return -1;
}
// Run example on each camera
int index = 0;
foreach(IManagedCamera managedCamera in camList) using(managedCamera)
{
Console.WriteLine("Running example for camera {0}...", index);
try
{
// Run example
result = result | program.RunSingleCamera(managedCamera);
}
catch (SpinnakerException ex)
{
Console.WriteLine("Error: {0}", ex.Message);
result = -1;
}
Console.WriteLine("Camera {0} example complete...\n", index++);
}
// Clear camera list before releasing system
camList.Clear();
// Release system
system.Dispose();
Console.WriteLine("\nDone! Press Enter to exit...");
Console.ReadLine();
return result;
}
}
}