//кодирование изображения
public void Compress(Bitmap image, IProgress <int> progress = null, CancellationToken?token = null)
{
if (progress == null)
{
progress = new Progress <int>();
}
if (token == null)
{
token = new CancellationToken();
}
Stopwatch sw = new Stopwatch();
sw.Start();
Bitmap[,] parts = SplitImage(image, out numberOfParts);
Bitmap[,,] domainBlocks;
int partOffsetX = image.Width / Data.RankBlockSize / numberOfParts;
int partOffsetY = image.Height / Data.RankBlockSize / numberOfParts;
var bbOriginal = new BufferedBitmap(image);
if (bbOriginal.IsGrey())
{
Data.ColorFlag = 1;
}
else
{
Data.ColorFlag = 3;
}
bbOriginal.Unlock();
double[] contrast = new double[Data.ColorFlag];
double[] brightness = new double[Data.ColorFlag];
double[] metric = new double[Data.ColorFlag];
double[] min = new double[Data.ColorFlag];
double[,,,] compressedData = new double[Data.ColorFlag, bbOriginal.Width / Data.RankBlockSize,
bbOriginal.Height / Data.RankBlockSize, numberOfParameters];
double controlValue = (bbOriginal.Width / Data.RankBlockSize) * (bbOriginal.Height / Data.RankBlockSize) / 100.0;
double count = 0;
int value = 1;
double mse = 0;
for (int partX = 0; partX < numberOfParts; partX++)
{
for (int partY = 0; partY < numberOfParts; partY++)
{
domainBlocks = CreateAllDomainBlocks(parts[partX, partY]);
bbOriginal = new BufferedBitmap(parts[partX, partY]);
for (int i = 0; i *Data.RankBlockSize != bbOriginal.Width; i++)
{
for (int j = 0; j *Data.RankBlockSize != bbOriginal.Height; j++)
{
if ((bool)token?.IsCancellationRequested)
{
progress.Report(0);
MessageBox.Show("Операция прервана");
return;
}
int indexX = i + partX * partOffsetX;
int indexY = j + partY * partOffsetY;
Bitmap rankBlock = SelectBlockFromImage(bbOriginal, i, j, Data.RankBlockSize);
if (min[0] != 0)
{
for (int k = 0; k < Data.ColorFlag; k++)
{
mse += min[k];
}
}
for (int k = 0; k < Data.ColorFlag; k++)
{
min[k] = double.PositiveInfinity;
}
var meanRankBlock = Metric.Mean(rankBlock);
for (int p = 0; p < parts[partX, partY].Width / Data.DomainBlockSize; p++)
{
for (int q = 0; q < parts[partX, partY].Height / Data.DomainBlockSize; q++)
{
var meanDomainBlock = Metric.Mean(domainBlocks[p, q, 0]);
for (int rotation = 0; rotation < numberOfRotations; rotation++)
{
contrast = Metric.GetContrast(rankBlock, domainBlocks[p, q, rotation], meanRankBlock, meanDomainBlock);
brightness = Metric.GetBrightness(contrast, meanRankBlock, meanDomainBlock);
metric = Metric.GetMetric(rankBlock, domainBlocks[p, q, rotation], contrast, brightness);
for (int m = 0; m < Data.ColorFlag; m++)
{
if (metric[m] < min[m])
{
min[m] = metric[m];
double[] mas = new double[] { p + partX * partOffsetX / Data.Factor, q + partY * partOffsetY / Data.Factor, rotation, contrast[m], brightness[m] };
for (int k = 0; k < mas.Length; k++)
{
compressedData[m, indexX, indexY, k] = mas[k];
}
}
}
//if (Data.FastCompression && min[0] <= 100)
//break;
}
//if (Data.FastCompression && min[0] <= 100)
//break;
}
count += 1.0 / domainBlocks.GetLength(1);
if (count >= controlValue)
{
if (value > 100)
{
value = 100;
}
progress.Report(value);
value++;
count -= controlValue;
count = Math.Round(count, 2);
}
//if (Data.FastCompression && min[0] <= 100)
//break;
}
}
}
}
}
mse = mse / ((image.Width / Data.RankBlockSize) * (image.Height / Data.RankBlockSize));
bbOriginal.Unlock();
double psnr = 10 * Math.Log10(image.Width * image.Height * Math.Pow(byte.MaxValue, 2) * Data.ColorFlag / mse);
WriteData(compressedData, image.Width, image.Height);
sw.Stop();
MessageBox.Show("Сжатие завершено\r\nВремя: " + (sw.ElapsedMilliseconds / 1000.0).ToString());
progress.Report(0);
}
