Question

This is the code:

if (Form1.ExtractAutomatic == true)
            {
                using (var bitmap = new Bitmap(_width, _height, _width * 3, PixelFormat.Format24bppRgb, pBuffer))
                {
                    if (!this.Secondpass)
                    {
                        long[] HistogramValues = Form1.GetHistogram(bitmap);
                        Form1.Histograms.Add(HistogramValues);
                        long t = Form1.GetTopLumAmount(HistogramValues, 1000);
                        Form1.averagesTest.Add(t);

                    }
                    else
                    {

                        if (_frameId > 0)
                        {
                            double t = Form1.averagesTest[_frameId] / 1000.0 - Form1.averagesTest[_frameId - 1] / 1000.0;
                            w.WriteLine("averagesTest >>>  " + t);
                            double tt = framesCounts();
                            if (_frameId == framesCounts())
                            {
                                w.Close();
                            }
                            if (Form1.averagesTest[_frameId] / 1000.0 - Form1.averagesTest[_frameId - 1] / 1000.0 > 0.0) 
                            {
                                count = 6;
                            }

                            if (count > 0)
                            {
                                ResizeBitmap(bitmap, 10, 10);
                                bitmap.RotateFlip(RotateFlipType.Rotate180FlipX);
                                bitmap.Save(Path.Combine(_outFolder, _frameId.ToString("D6") + ".bmp"),ImageFormat.Bmp);
                                count --;
                            }

And ResizeBitmap is:

public static Bitmap ResizeBitmap(Bitmap b, int nWidth, int nHeight)
        {
            Bitmap result = new Bitmap(nWidth, nHeight);
            using (Graphics g = Graphics.FromImage((Image)result))
                g.DrawImage(b, 0, 0, nWidth, nHeight);
            return result;
        }

Why the files on the hard disk are 1920X1080 and not 10X10 ?
And why the saving is so slow ? I thought saving files to the hard disk in this case about 2600 frames should be fast no ?

Can someone show me how ot fix it according to my code ?

Thanks.

Answer 1

It should be

bitmap = ResizeBitmap(bitmap, 10, 10);

You aren’t assigning the resized bitmap to anything.