float[] load_image_in_channels_first_format(string path, int width, int height)
{
var src = OpenCvSharp.Cv2.ImRead(path);
OpenCvSharp.Cv2.Resize(src, src, new OpenCvSharp.Size(width, height));
var dst_bgr = new OpenCvSharp.MatOfPoint3f();
src.ConvertTo(dst_bgr, OpenCvSharp.MatType.CV_32FC3);
int numPixels = width * height;
var result = new float[3 * numPixels];
var buffer = dst_bgr.ToArray();
var pos = 0;
for (int row = 0; row < height; row++)
{
for (int column = 0; column < width; column++, pos++)
{
result[pos] = buffer[pos].X;
result[pos + numPixels] = buffer[pos].Y;
result[pos + 2 * numPixels] = buffer[pos].Z;
}
}
return(result);
}
void testing()
{
var app = new System.Windows.Application();
var p1 = new PlotWindow(cat_filename);
var p2 = new PlotWindow(cat_filename);
p1.Show();
Console.WriteLine("step 1");
p2.Show();
Console.WriteLine("step 2");
// read, and resize an OpenCV matrix
var src = OpenCvSharp.Cv2.ImRead(cat_filename);
OpenCvSharp.Cv2.Resize(src, src, new OpenCvSharp.Size(150, 150));
// Convert to 3 32-bit (float) channels format
var dst_bgr = new OpenCvSharp.MatOfPoint3f();
src.ConvertTo(dst_bgr, OpenCvSharp.MatType.CV_32FC3);
// let's remove all the blue, green
var buffer = dst_bgr.ToArray();
for (int i = 0; i < buffer.Length; i++)
{
buffer[i].X = 0;
buffer[i].Y = 0;
}
dst_bgr = new OpenCvSharp.MatOfPoint3f(150, 150, buffer);
// let's convert it back to 3 8-bit channels
var recovered_src = new OpenCvSharp.Mat();
dst_bgr.ConvertTo(recovered_src, OpenCvSharp.MatType.CV_8UC3);
// display an OpenCV matrix -- works as long as the underlying format is OpenCvSharp.MatType.CV_8UC3
new PlotWindow(recovered_src, "from opencv").Show();
app.Run();
}
