/// <summary>
/// Process the input image and render into the output image
/// </summary>
/// <param name="imageIn">The input image</param>
/// <param name="imageOut">
/// The output image, can be the same as <paramref name="imageIn"/>, in which case we will render directly into the input image.
/// Note that if no bar codes are detected, <paramref name="imageOut"/> will remain unchanged.
/// If bar codes are detected, we will draw the code and (rectangle) regions on top of the existing pixels of <paramref name="imageOut"/>.
/// If the <paramref name="imageOut"/> is not the same object as <paramref name="imageIn"/>, it is a good idea to copy the pixels over from the input image before passing it to this function.
/// </param>
/// <returns>The messages that we want to display.</returns>
public String ProcessAndRender(IInputArray imageIn, IInputOutputArray imageOut)
{
using (VectorOfMat points = new VectorOfMat())
{
Stopwatch watch = Stopwatch.StartNew();
var barcodesFound = _barcodeDetector.DetectAndDecode(imageIn);
watch.Stop();
for (int i = 0; i < barcodesFound.Length; i++)
{
Point[] contour = Array.ConvertAll(barcodesFound[i].Points, Point.Round);
using (VectorOfVectorOfPoint vpp = new VectorOfVectorOfPoint(new Point[][] { contour }))
{
CvInvoke.DrawContours(imageOut, vpp, -1, RenderColor);
}
CvInvoke.PutText(
imageOut,
barcodesFound[i].DecodedInfo,
Point.Round(barcodesFound[i].Points[0]),
FontFace.HersheySimplex,
1.0,
RenderColor
);
}
if (barcodesFound.Length == 0)
{
return(String.Format("No barcodes found (in {0} milliseconds)", watch.ElapsedMilliseconds));
}
String[] barcodesTexts = Array.ConvertAll(barcodesFound,
delegate(BarcodeDetector.Barcode input) { return(input.DecodedInfo); });
String allBarcodeText = String.Join(";", barcodesTexts);
return(String.Format(
"Barcodes found (in {1} milliseconds): {0}",
allBarcodeText,
watch.ElapsedMilliseconds));
}
}
