private void openCompressedToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
byte[] fileBytes;
// Set filter options and filter index.
openFileDialog1.InitialDirectory = @"N:\My Documents\My Pictures";
openFileDialog1.Filter = "My compression (*.cmpr|*.cmpr";
openFileDialog1.Multiselect = false;
openFileDialog1.FilterIndex = 1;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
DCT dct = new DCT();
dct.openSavedFile(openFileDialog1.FileName);
Bitmap finalImage = generateRgbBitmapFromYCbCr(dct.YImage, dct.CbImage, dct.CrImage);
finalImage.Save("FinalJPEG.bmp", ImageFormat.Bmp);
pictureBox2.Image = finalImage;
pictureBox2.SizeMode = PictureBoxSizeMode.Zoom;
//uncompressedBitmap = new Bitmap(openFileDialog1.FileName);
}
}
/*Generate motion vectors between the two frames*/
private void generateMotionVectorsToolStripMenuItem_Click(object sender, EventArgs e)
{
int width = uncompressedSecondFrame.Width;
int height = uncompressedSecondFrame.Height;
double[,] Y = new double[width, height];
double[,] Cb = new double[width / 2, height / 2];
double[,] Cr = new double[width / 2, height / 2];
//generate the Y, Cb, Cr values from the second frame
generateYcbcrBitmap(uncompressedSecondFrame, ref Y, ref Cb, ref Cr);
double[,] Y2 = new double[width, height];
double[,] Cb2 = new double[width / 2, height / 2];
double[,] Cr2 = new double[width / 2, height / 2];
generateYcbcrBitmap(uncompressedBitmap, ref Y2, ref Cb2, ref Cr2);
DCT dct = new DCT();
Point[,] vectors = new Point[(int)Math.Ceiling((double)width/8), (int)Math.Ceiling((double)height / 8)];
Block[,] YerrorBlocks = new Block[(int)Math.Ceiling((double)width / 8), (int)Math.Ceiling((double)height / 8)];
Block[,] CberrorBlocks = new Block[(int)Math.Ceiling((double)width / 8), (int)Math.Ceiling((double)height / 8)];
Block[,] CrerrorBlocks = new Block[(int)Math.Ceiling((double)width / 8), (int)Math.Ceiling((double)height / 8)];
VideoCompression vidcom = new VideoCompression();
for (int y=0; y<height; y+=8) {
for (int x = 0; x < width; x += 8) {
Block Yblock = dct.generateBlock(Y, x, y);
Block Cbblock = dct.generateBlock(Cb, x, y);
Block Crblock = dct.generateBlock(Cr, x, y);
vectors[x/8,y/8] = vidcom.getVector(Y2, Yblock, x, y, 15);
vidcom.getErrorForPosition(Cb2, Cbblock, vectors[x / 8, y / 8].X, vectors[x / 8, y / 8].Y, 2);
vidcom.getErrorForPosition(Cr2, Crblock, vectors[x / 8, y / 8].X, vectors[x / 8, y / 8].Y, 3);
YerrorBlocks[x/8,y/8] = vidcom.getCurrentYErrorBlock();
CberrorBlocks[x / 8, y / 8] = vidcom.getCurrentCbErrorBlock();
CrerrorBlocks[x / 8, y / 8] = vidcom.getCurrentCrErrorBlock();
Debug.Write("(" + vectors[x/8,y/8].X + "," + vectors[x/8,y/8].Y+"),");
}
Debug.WriteLine("");
}
dct.compressPframe(YerrorBlocks, CberrorBlocks, CrerrorBlocks, vectors, width, height);
Block[,] finalY = new Block[dct.Yblocks.GetLength(0), dct.Yblocks.GetLength(1)];
Block[,] finalCb = new Block[dct.Yblocks.GetLength(0), dct.Yblocks.GetLength(1)];
Block[,] finalCr = new Block[dct.Yblocks.GetLength(0), dct.Yblocks.GetLength(1)];
for (int y=0; y<dct.Yblocks.GetLength(0); y++) {
for (int x=0; x<dct.Yblocks.GetLength(1); x++) {
vidcom.getOriginalFromError(Y2, dct.Yblocks[x,y], x*8+vectors[x,y].X, y * 8 + vectors[x,y].Y, 1);
finalY[x, y] = vidcom.YpostBlock;
vidcom.getOriginalFromError(Cb2, dct.Cbblocks[x, y], x * 8 + vectors[x, y].X, y * 8 + vectors[x, y].Y, 2);
finalCb[x, y] = vidcom.CbpostBlock;
vidcom.getOriginalFromError(Cr2, dct.Crblocks[x, y], x * 8 + vectors[x, y].X, y * 8 + vectors[x, y].Y, 3);
finalCr[x, y] = vidcom.CrpostBlock;
}
}
double[,] finalYimage = dct.makeDoubleArrayFromBlocks(finalY, width, height);
double[,] finalCbimage = dct.makeDoubleArrayFromBlocks(finalCb, width, height);
double[,] finalCrimage = dct.makeDoubleArrayFromBlocks(finalCr, width, height);
Bitmap pframe = generateRgbBitmapFromYCbCr(finalYimage, finalCbimage, finalCrimage);
pictureBox2.Image = pframe;
pictureBox2.SizeMode = PictureBoxSizeMode.Zoom;
}
/*
Compress an image bitmap using jpeg techniques
---------------------------Starting point of compression.-------------------------------------------------------
*/
public void compressBitmap(Bitmap uncompressed)
{
int width = uncompressed.Width;
int height = uncompressed.Height;
double[,] Y = new double[width,height];
double[,] Cb = new double[width/2,height/2];
double[,] Cr = new double[width / 2, height / 2];
generateYcbcrBitmap(uncompressed, ref Y, ref Cb, ref Cr);
setYImage(Y, Cb, Cr);//Sets the images to display on screen
Bitmap testBitmap = new Bitmap(width, height);
testBitmap = generateRgbBitmapFromYCbCr(Y, Cb, Cr);
testBitmap.Save("SubsampledImage.bmp", ImageFormat.Bmp);
DCT dct = new DCT();
dct.setY(Y);
dct.setCb(Cb);
dct.setCr(Cr);
dct.runDCT();
System.Windows.Forms.MessageBox.Show("Compression complete!");
}
