public void Bitwise_method(float[,] pixel_matrix, BinaryWriter bWriter, bool oneframe)
{
UInt32 evt;
UInt32 timestamp;
ASCIIEncoding asen = new ASCIIEncoding();
//AEDAT HEADER FOR JAER
if (oneframe)
{
bWriter.Write(asen.GetBytes("#!AER-DAT2.0\r\n"));
bWriter.Write(asen.GetBytes("# This is a raw AE data file created by saveaerdat.m\r\n"));
bWriter.Write(asen.GetBytes("# Data format is int32 address, int32 timestamp (8 bytes total), repeated for each event\r\n"));
bWriter.Write(asen.GetBytes("# Timestamps tick is 1 us\r\n"));
bWriter.Write(asen.GetBytes("# End of ASCII Header\r\n"));
}
UInt32 addr = 0;
UInt32 ts = 0;
for (Int32 i = 0; i < Math.Pow(2, 22); i++)
{
//Reverse counter value
UInt32 reversed_count = Frame_Utils.Reverse32((UInt32)i);
//Decoder inverted counter value
int b_xpos = (int)(reversed_count >> 8) & 0x7f;
int b_ypos = (int)(reversed_count >> 15) & 0x7f;
int bitwise_greyscale = (int)reversed_count & 0xff;
int matrix_value = (int)Math.Round((1 - pixel_matrix[b_xpos, b_ypos]) * 256);
//Compare grayscale, if condition is true generate and event and write in the output file
if (bitwise_greyscale >= matrix_value)
{
addr = (UInt32)((127 - b_ypos) << 8 | (127 - b_xpos) << 1 | 1);
ts = ts + (UInt32)this.GetLatency();
evt = (UInt32)((BitConverter.GetBytes(addr)[0] << 24) | BitConverter.GetBytes(addr)[1] << 16 | BitConverter.GetBytes(addr)[2] << 8 | BitConverter.GetBytes(addr)[3]);
timestamp = (UInt32)((BitConverter.GetBytes(ts)[0] << 24) | BitConverter.GetBytes(ts)[1] << 16 | BitConverter.GetBytes(ts)[2] << 8 | BitConverter.GetBytes(ts)[3]);
bWriter.Write(evt);
bWriter.Write(timestamp);
}
}
}
private void ApplyFilter_Click(object sender, EventArgs e)
{
//No image loaded
if (current_image == null)
{
MessageBox.Show("Please Select an Image");
}
else
{
//Apply filter to image
Image <Gray, float> Convolved_Image = new Image <Gray, float>(current_image);
string filter_text = filter_list.Text;
switch (filter_text)
{
case "Sobel Vertical":
Convolved_Image = ImageFrame.Convert <Gray, Byte>().Sobel(0, 1, 3).AbsDiff(new Gray(0.0));
break;
case "Sobel Horizontal":
Convolved_Image = ImageFrame.Convert <Gray, Byte>().Sobel(1, 0, 3).AbsDiff(new Gray(0.0));
break;
case "Laplacian":
Convolved_Image = ImageFrame.Convert <Gray, Byte>().Laplace(3).AbsDiff(new Gray(5.0));
break;
case "Gaussian":
Convolved_Image = ImageFrame.Convert <Gray, float>().SmoothGaussian(3);
break;
}
//Update current Image
current_image = Convolved_Image.Bitmap;
//Get Pixel brightness of new image
Frame_Utils.Get_pixel_bright(current_image, pixel_matrix);
//Update Picturebox with New Image
Image_box.Image = current_image;
}
}
//Browse for an image and get pixel brightness for future conversion/modification and update picture box
private void BrowseImage_Click(object sender, EventArgs e)
{
//Open File explorer
Stream myStream = null;
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.InitialDirectory = "c:\\";
openFileDialog.Filter = "png files (*.png)|*.png|jpg files (*.jpg)|*.jpg|All files (*.*)|*.*";
openFileDialog.FilterIndex = 2;
openFileDialog.RestoreDirectory = true;
conversion_algorithms = new Algorithms((UInt32)eventlatency.Value);
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
try
{
if ((myStream = openFileDialog.OpenFile()) != null)
{
using (myStream)
{
//Get Image and rescale its size to 128x128
ImageFrame = new Image <Bgr, Byte>((Bitmap)Bitmap.FromFile(openFileDialog.FileName)).Resize(128, 128, 0);
Image <Gray, Byte> grayImage = ImageFrame.Convert <Gray, Byte>();
current_image = grayImage.Bitmap;
//Get brightness of pixels
pixel_matrix = new float[current_image.Width, current_image.Height];
Frame_Utils.Get_pixel_bright(current_image, pixel_matrix);
Image_box.Image = grayImage.Bitmap;
Image_box.SizeMode = PictureBoxSizeMode.StretchImage;
Image_box.Refresh();
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
}
}
}
