/// <summary>
/// Draw shapes onto the control
/// </summary>
/// <param name="imageInfo"></param>
private void drawShapes(ActiveFlyCapLib.ImageInfo imageInfo)
{
int iThickness = (int)(0.005 * Math.Max(imageInfo.lRows, imageInfo.lCols));
// Rectangle
axActiveFlyCapControl.DrawRectangle(
(short)(imageInfo.lCols / 3),
(short)(imageInfo.lRows / 3),
(short)((imageInfo.lCols * 2) / 3),
(short)((imageInfo.lRows * 2) / 3),
(short)iThickness,
255,
0,
0);
// Vertical line
axActiveFlyCapControl.DrawLine(
(short)(imageInfo.lCols / 2),
0,
(short)(imageInfo.lCols / 2),
(short)imageInfo.lRows,
(short)iThickness,
0,
255,
0);
// Circle
int iRadius = (int)(0.03 * Math.Max(imageInfo.lRows, imageInfo.lCols));
axActiveFlyCapControl.DrawEllipse(
(short)((imageInfo.lCols / 2) - iRadius),
(short)((imageInfo.lRows / 2) - iRadius),
(short)((imageInfo.lCols / 2) + iRadius),
(short)((imageInfo.lRows / 2) + iRadius),
(short)iThickness,
128,
0,
128);
// Text
// Graphics unit needs to be point
Font newFont = new Font(
FontFamily.GenericSansSerif,
36,
FontStyle.Regular,
GraphicsUnit.Point);
axActiveFlyCapControl.Font = newFont;
axActiveFlyCapControl.DrawText(
10,
10,
"Frames Captured: " + m_lFramesCaptured.ToString(),
255,
0,
0);
}
/// <summary>
/// Calculate the image average
/// </summary>
/// <param name="imageInfo"></param>
/// <returns></returns>
private int calcImageAvg(ActiveFlyCapLib.ImageInfo imageInfo)
{
// Comment this out if you want to calculate the average
return(0);
// This should only be called if the control is not in free
// running mode
if (axActiveFlyCapControl.GetGrabMode() == ActiveFlyCapLib.GrabMode.FreeRunning)
{
return(0);
}
long lAvg = 0;
int iImageSize = imageInfo.lRows * imageInfo.lRowInc;
unsafe
{
// Get the pointer to the data
object obj = axActiveFlyCapControl.GetImagePtr(ActiveFlyCapLib.ImageType.RawImage);
int temp = (int)obj;
byte * pArray = (byte *)temp;
// Iterate over the array and calculate the average
for (int i = 0; i < iImageSize; i++)
{
try
{
lAvg += pArray[i];
}
catch (System.AccessViolationException e_accessViolation)
{
Debug.WriteLine("Exception: " + e_accessViolation.ToString());
}
}
lAvg /= iImageSize;
}
return((int)lAvg);
}
