public void Dispose()
{
_visitedPixels.Dispose();
_visitedPixels = null;
_seeds.Clear();
_seeds = null;
}
public ContourLine[] Generate(IRasterBand raster, double[] contourValues, int[] aoi, Action <int, string> tracker)
{
Size oSize = new Size(raster.Width, raster.Height);
bool isNewRaster = false;
int offsetRow = 0, offsetCol = 0;
if (aoi != null && aoi.Length > 0)
{
//感兴趣区域不采样
_sample = 1;
Rectangle rect = AOIHelper.ComputeAOIRect(aoi, oSize);
offsetRow = rect.Top;
offsetCol = rect.Left;
raster = GetAOIRaster(raster, aoi, rect, oSize);
isNewRaster = true;
}
_raster = raster;
_width = raster.Width / _sample;
_height = raster.Height / _sample;
_gridWidth = _width - 1;
_gridHeight = _height - 1;
_triWidth = _gridWidth * 2;
_contourValues = contourValues;
_triangleCount = 2 * _gridWidth * _gridHeight;
_triangleIsUsed = new StatusRecorder(_triangleCount);
_edgeCount = _gridWidth * _height + _gridHeight * _width + _gridWidth * _gridHeight;
_edgeIsUsed = new StatusRecorder(_edgeCount);
try
{
if (tracker != null)
{
tracker(0, "正在准备数据...");
}
ReadBandValues();
if (tracker != null)
{
tracker(10, "正在提取边界三角形...");
}
GetBorderTriangles();
if (tracker != null)
{
tracker(12, "正在生成等值线...");
}
_contourLines = new List <ContourLine>();
GenerateContours(tracker);
if (tracker != null)
{
tracker(100, "等值线生成完毕!");
}
}
finally
{
if (isNewRaster)
{
OffsetToFull(_contourLines, offsetRow, offsetCol);
raster.Dispose();
}
}
return(_contourLines != null && _contourLines.Count > 0 ? _contourLines.ToArray() : null);
}
public ContourLine[] Generate(int width, int height, double[] contourValues, Action <int, string> tracker)
{
bool isNewRaster = false;
int offsetRow = 0, offsetCol = 0;
_width = width;
_height = height;
_gridWidth = _width - 1;
_gridHeight = _height - 1;
_triWidth = _gridWidth * 2;
_contourValues = contourValues;
_triangleCount = 2 * _gridWidth * _gridHeight;
_triangleIsUsed = new StatusRecorder(_triangleCount);
_edgeCount = _gridWidth * _height + _gridHeight * _width + _gridWidth * _gridHeight;
_edgeIsUsed = new StatusRecorder(_edgeCount);
try
{
if (tracker != null)
{
tracker(10, "正在提取边界三角形...");
}
GetBorderTriangles();
if (tracker != null)
{
tracker(12, "正在生成等值线...");
}
_contourLines = new List <ContourLine>();
GenerateContours(tracker);
if (tracker != null)
{
tracker(100, "等值线生成完毕!");
}
}
finally
{
if (isNewRaster)
{
OffsetToFull(_contourLines, offsetRow, offsetCol);
}
}
return(_contourLines != null && _contourLines.Count > 0 ? _contourLines.ToArray() : null);
}
private unsafe void DoMagicWand(BitmapData pdata, Point startPoint, byte tolerance, bool isContinued,
Action <int, int, int> segmentAction, Action regionAction)
{
CheckArgBandFillFields(pdata, tolerance, startPoint);
_visitedPixels = new StatusRecorder(_width * pdata.Height);
if (isContinued)
{
_seeds.Enqueue(startPoint.Y * _width + startPoint.X);
FloodFill(segmentAction);
if (regionAction != null)
{
regionAction();
}
}
else
{
int count = _width * _height;
byte *ptr;
for (int i = 0; i < count; i++)
{
if (_visitedPixels.IsTrue(i))
{
continue;
}
ptr = (byte *)_scan0 + (i / _width) * _stride + (i % _width) * _pixelWidth;
if (ColorIsMatched(ptr))
{
_seeds.Enqueue(i);
FloodFill(segmentAction);
if (regionAction != null)
{
regionAction();
}
}
else
{
_visitedPixels.SetStatus(i, true);
}
}
}
}
public static int[] Reversal(int[] aoi, Size size)
{
int count = size.Width * size.Height;
StatusRecorder status = new StatusRecorder(count);
int aoiCount = aoi.Length;
for (int i = 0; i < aoiCount; i++)
{
status.SetStatus(aoi[i], true);
}
List <int> retAOI = new List <int>(count - aoiCount);
for (int i = 0; i < count; i++)
{
if (!status.IsTrue(i))
{
retAOI.Add(i);
}
}
return(retAOI.Count > 0 ? retAOI.ToArray() : null);
}
