public int[] GetAOI(ShapePolygon[] geometrys, Envelope dstEnvelope, Size size)
{
if (dstEnvelope == null || size.IsEmpty)
{
return(null);
}
double resX = dstEnvelope.Width / size.Width;
double resY = dstEnvelope.Height / size.Height;
Envelope aoiEnvelope = GetSrcEnvelope(geometrys);
aoiEnvelope = aoiEnvelope.IntersectWith(dstEnvelope);
if (aoiEnvelope == null)
{
return(null);
}
Size aoiSize = new Size((int)GetInteger((aoiEnvelope.Width / resX), resX), (int)GetInteger((aoiEnvelope.Height / resY), resY));
if (aoiSize.IsEmpty)
{
return(null);
}
// by chennan 修正当AOI区域因精度问题计算出现偏差时，导致索引超出界限问题
if (aoiSize.Width > size.Width)
{
aoiSize.Width = size.Width;
}
if (aoiSize.Height > size.Height)
{
aoiSize.Height = size.Height;
}
//
int offsetX = (int)((aoiEnvelope.MinX - dstEnvelope.MinX) / resX);
int offsetY = (int)((dstEnvelope.MaxY - aoiEnvelope.MaxY) / resY);
using (Bitmap buffer = GetBitmap(geometrys, aoiEnvelope, aoiSize))
{
//buffer.Save(@"D:\bmp\" + (bmptext++.ToString()) + ".bmp");
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
int[] aoi = c.ToRaster(buffer, Color.Red);
if (aoi == null)
{
return(null);
}
int count = aoi.Length;
int newWidth = aoiSize.Width;
int oldWidth = size.Width;
int row = 0, col = 0;
for (int i = 0; i < count; i++)
{
row = aoi[i] / newWidth;
col = aoi[i] % newWidth;
row += offsetY;
col += offsetX;
aoi[i] = row * oldWidth + col;
}
return(aoi);
}
}
}
public int[] GetAOIByFeature(Bitmap bitmap, Color color)
{
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
return(c.ToRaster(bitmap, color));
}
}
/// <summary>
/// 解决了大图像AOI栅格化内存溢出的问题
/// 解决方法：
/// 1、按照AOI的最小外包矩形栅格化计算AOI索引
/// 2、将计算完成的AOI索引平移到大图
/// </summary>
/// <param name="rasterPoints"></param>
/// <param name="types"></param>
/// <param name="size"></param>
/// <returns></returns>
public int[] GetAOI(PointF[] rasterPoints, byte[] types, Size size)
{
Envelope evp = new Envelope(0, 0, size.Width, size.Height);
using (IVector2BitmapConverter c = new Vector2BitmapConverter())
{
int offsetX, offsetY;
Size newSize;
Bitmap buffer = GetBitmapUseRasterII(rasterPoints, types, evp, size, out offsetX, out offsetY, out newSize);
if (newSize.IsEmpty || buffer == null)
{
return(null);
}
using (IBitmap2RasterConverter rstc = new Bitmap2RasterConverter())
{
int[] aoi = rstc.ToRaster(buffer, Color.Red);
if (aoi == null || aoi.Length == 0)
{
return(null);
}
if (aoi != null)
{
Array.Sort <int>(aoi);
}
int count = aoi.Length;
int newWidth = newSize.Width;
int oldWidth = size.Width;
int oldHeight = size.Height;
int row = 0, col = 0;
List <int> newAio = new List <int>();
for (int i = 0; i < count; i++)
{
row = aoi[i] / newWidth;
col = aoi[i] % newWidth;
row += offsetY;
col += offsetX;
if (col < 0 || col >= oldWidth || row < 0 || row >= oldHeight)
{
continue;
}
else
{
newAio.Add(row * oldWidth + col);
}
}
return(newAio.ToArray());
}
}
}
public int[] GetAOI_OLD(ShapePolygon[] geometrys, Envelope dstEnvelope, Size size)
{
if (dstEnvelope == null || size.IsEmpty)
{
return(null);
}
using (Bitmap buffer = GetBitmap(geometrys, dstEnvelope, size))
{
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
return(c.ToRaster(buffer, Color.Red));
}
}
}
public int[] GetAOI(PointF[] coordPoints, byte[] types, Envelope dstEnvelope, Size size)
{
if (dstEnvelope == null || size.IsEmpty)
{
return(null);
}
using (IVector2BitmapConverter c = new Vector2BitmapConverter())
{
Bitmap buffer = GetBitmap(coordPoints, types, dstEnvelope, size);
using (IBitmap2RasterConverter rstc = new Bitmap2RasterConverter())
{
return(rstc.ToRaster(buffer, Color.Red));
}
}
}
public byte[] GetRaster(ShapePolygon[] geometrys, Envelope dstEnvelope, Size size)
{
if (dstEnvelope == null || size.IsEmpty)
{
return(null);
}
Color[] colors = GetColors(geometrys.Length);
using (Bitmap buffer = GetBitmap(geometrys, colors, dstEnvelope, size))
{
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
return(c.ToRaster(buffer, colors));
}
}
}
public int[] GetAOI_OLD(PointF[] rasterPoints, byte[] types, Size size)
{
Envelope evp = new Envelope(0, 0, size.Width, size.Height);
using (IVector2BitmapConverter c = new Vector2BitmapConverter())
{
Bitmap buffer = GetBitmapUseRaster(rasterPoints, types, evp, size);
using (IBitmap2RasterConverter rstc = new Bitmap2RasterConverter())
{
int[] aoi = rstc.ToRaster(buffer, Color.Red);
if (aoi != null)
{
Array.Sort <int>(aoi);
}
return(aoi);
}
}
}
public static int[] Reverse(int[] aoi, Size size)
{
if (aoi == null || aoi.Length == 0 || size.Width == 0 || size.Height == 0)
{
return(null);
}
using (IBinaryBitmapBuilder b = new BinaryBitmapBuilder())
{
Bitmap bm = b.CreateBinaryBitmap(size, Color.Red, Color.Black);
try
{
b.Fill(aoi, size, ref bm);
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
return(c.ToRaster(bm, Color.Black));
}
}
finally
{
bm.Dispose();
}
}
}
public int GetAOICount(ShapePolygon[] geometrys, Envelope dstEnvelope, Size size)
{
if (dstEnvelope == null || size.IsEmpty)
{
return(0);
}
double resX = dstEnvelope.Width / size.Width;
double resY = dstEnvelope.Height / size.Height;
Envelope aoiEnvelope = GetSrcEnvelope(geometrys);
aoiEnvelope = aoiEnvelope.IntersectWith(dstEnvelope);
if (aoiEnvelope == null)
{
return(0);
}
Size aoiSize = new Size((int)GetInteger((aoiEnvelope.Width / resX), resX), (int)GetInteger((aoiEnvelope.Height / resY), resX));
if (aoiSize.IsEmpty)
{
return(0);
}
int offsetX = (int)((aoiEnvelope.MinX - dstEnvelope.MinX) / resX);
int offsetY = (int)((dstEnvelope.MaxY - aoiEnvelope.MaxY) / resY);
using (Bitmap buffer = GetBitmap(geometrys, aoiEnvelope, aoiSize))
{
using (IBitmap2RasterConverter c = new Bitmap2RasterConverter())
{
int[] aoi = c.ToRaster(buffer, Color.Red);
if (aoi == null)
{
return(0);
}
return(aoi.Length);
}
}
}
