private void button_AutoWhite_Click(object sender, EventArgs e)
{
if (m_pImageWnd == null)
{
return;
}
if (m_pImageWnd.IsTrackerEmpty)
{
MessageBox.Show("You must select a ROI containing white pixels");
return;
}
if (m_pBayer.Enabled && !m_pBayer.SoftwareConversion)
{
MessageBox.Show("White balance is not available when hardware Bayer conversion is enabled");
return;
}
Rectangle rect = m_pImageWnd.Tracker;
if (rect.Width > 1 && rect.Height > 1)
{
// Compute new white balance factors from region of interest
if (m_pBayer.WhiteBalance(rect.Left, rect.Top, rect.Width, rect.Height))
{
// Update user interface
UpdateInterface();
// Redraw the image
UpdateView();
}
}
}
static bool AutoWhiteBalanceOperations(SapAcqDevice Camera, SapBuffer Buffers, SapTransfer Transfer)
{
Console.WriteLine("\nCalibration in progress ...........\n\n");
double coefBlueGain = MAX_COEF + 1;
double coefGreenGain = MAX_COEF + 1;
double coefRedGain = MAX_COEF + 1;
int calibrationIteration = 0;
// Create a new Bayer object
SapBayer Bayer = new SapBayer(Buffers);
SapFeature FeatureInfo = new SapFeature(Camera.Location);
if (!FeatureInfo.Create())
{
DestroysFeaturesAndBayer(FeatureInfo, Bayer);
return(false);
}
// Create Bayer object
if (!Bayer.Create())
{
DestroysFeaturesAndBayer(FeatureInfo, Bayer);
return(false);
}
// Initialize all Gain colors to 0
Camera.SetFeatureValue("GainBlue", 0);
Camera.SetFeatureValue("GainGreen", 0);
Camera.SetFeatureValue("GainRed", 0);
// Choose alignment used
Bayer.Align = SapBayer.AlignMode.RGGB;
// Definition of ROI used for calibration
int fixSelectedRoiLeft = 0;
int fixSelectedRoiTop = 0;
// Half buffer width
int fixSelectedRoiWidth = Buffers.Width / 2;
// Half buffer height
int fixSelectedRoiHeight = Buffers.Height / 2;
// Start loop for calibration until each coefficient is under 1.05
while (coefBlueGain > MAX_COEF || coefGreenGain > MAX_COEF || coefRedGain > MAX_COEF)
{
if (!Transfer.Snap())
{
Console.WriteLine("Unable to acquire an image");
return(false);
}
Thread.Sleep(500);
// Call WhiteBalance function
if (!Bayer.WhiteBalance(Buffers, fixSelectedRoiLeft, fixSelectedRoiTop, fixSelectedRoiWidth, fixSelectedRoiHeight))
{
break;
}
// New coefficients values are reused.
coefBlueGain = Bayer.WBGain.Blue;
coefGreenGain = Bayer.WBGain.Green;
coefRedGain = Bayer.WBGain.Red;
if (coefRedGain > MAX_COEF)
{
if (!ComputeGain("GainRed", Camera, FeatureInfo, coefRedGain))
{
break;
}
}
if (coefGreenGain > MAX_COEF)
{
if (!ComputeGain("GainGreen", Camera, FeatureInfo, coefGreenGain))
{
break;
}
}
if (coefBlueGain > MAX_COEF)
{
if (!ComputeGain("GainBlue", Camera, FeatureInfo, coefBlueGain))
{
break;
}
}
if (calibrationIteration >= MAX_CALIBRATION_ITERATION)
{
Console.WriteLine("Iterations for calibration are at the maximum.\n");
break;
}
calibrationIteration++;
}
// Uncomment this part if you want to get new values after calibration.
/*
* int gainBlue=0, gainRed=0, gainGreen=0;
* Camera.GetFeatureValue("GainBlue", out gainBlue);
* Camera.GetFeatureValue("GainRed", out gainRed);
* Camera.GetFeatureValue("GainGreen", out gainGreen);
*/
DestroysFeaturesAndBayer(FeatureInfo, Bayer);
Console.WriteLine("\nCalibration finished ...........\n\n");
return(true);
}