void vcd_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
try
{
if (!processando)
{
processando = true;
bmp = (Bitmap)eventArgs.Frame.Clone();
if (ImgDtWebCam == null)
ImgDtWebCam = new ImageData(bmp);
else ImgDtWebCam.ReadBmp(bmp);
//Filter
if (!frmFilter.IsDisposed) filterWebCam = frmFilter.GetFilters();
CLFilter.ApplyFilter(ImgDtWebCam, filterWebCam, true, WorkDim2);
bmp = ImgDtWebCam.GetStoredBitmap(bmp);
if (!sw.IsRunning) sw.Start();
nFrames++;
fRate = nFrames / sw.Elapsed.TotalSeconds;
this.Invoke(delegRefreshPic);
processando = false;
}
}
catch (Exception ex)
{
this.Text = ex.ToString();
}
}
/// <summary>Applies given filter to the image</summary>
/// <param name="imgDt">Image to be filtered</param>
/// <param name="Filter">Filter. [3*size*size]</param>
public static void ApplyFilter(ImageData imgDt, float[] Filter, bool useOpenCL, bool useWorkDim2)
{
int FilterSize = (int)Math.Sqrt(Filter.Length/3);
if (Filter.Length != 3 * FilterSize * FilterSize)
throw new Exception("Invalid filter");
if (!Initialized && useOpenCL) Init(FilterSize);
//Writes filter to device
if(useOpenCL) varFilter.WriteToDevice(Filter);
if (FilteredVals == null || FilteredVals.Length != imgDt.Height * imgDt.Width * 3)
{
//Filtered values
FilteredVals = new float[imgDt.Height * imgDt.Width * 3];
varFiltered = new CLCalc.Program.Variable(FilteredVals);
}
//Width
if (useOpenCL) varWidth.WriteToDevice(new int[] { imgDt.Width });
//Executes filtering
int mean = (FilterSize - 1) / 2;
if (useOpenCL)
{
CLCalc.Program.Variable[] args = new CLCalc.Program.Variable[] { imgDt.varData, varFilter, varFiltered, varWidth };
if (useWorkDim2)
{
kernelApplyFilterWorkDim2.Execute(args, new int[] { imgDt.Width - FilterSize, imgDt.Height - FilterSize });
}
else
{
kernelApplyFilter.Execute(args, new int[] { imgDt.Height - FilterSize });
}
//Reads data back
varFiltered.ReadFromDeviceTo(FilteredVals);
}
else
{
ApplyFilter(imgDt.Data, Filter, FilteredVals, new int[] { imgDt.Width }, imgDt.Height - FilterSize);
}
//Writes to image data
for (int y = mean; y < imgDt.Height - mean - 1; y++)
{
int wy = imgDt.Width * y;
for (int x = mean; x < imgDt.Width - mean - 1; x++)
{
int ind = 3 * (x + wy);
imgDt.Data[ind] = (byte)FilteredVals[ind];
imgDt.Data[ind + 1] = (byte)FilteredVals[ind + 1];
imgDt.Data[ind + 2] = (byte)FilteredVals[ind + 2];
}
}
//Writes filtered values
//In the future this rewriting can be avoided
//because byte_addressable will be widely available
if (useOpenCL) imgDt.varData.WriteToDevice(imgDt.Data);
}
private void btnOpenFile_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Pictures|*.jpg";
if (ofd.ShowDialog() == DialogResult.OK)
{
try
{
bmp = new Bitmap(ofd.FileName);
imgDt = new ImageData(bmp);
pic.Image = bmp;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
