public static SortedList <int, ColRangeOfRow> ComputeColRanges(int[] aoi, Size size)
{
SortedList <int, ColRangeOfRow> rowRanges = new SortedList <int, ColRangeOfRow>();
ColRangeOfRow range = null;
int nCount = aoi.Length;
int row = 0, col = 0, width = size.Width;
for (int i = 0; i < nCount; i++)
{
row = aoi[i] / width;
col = aoi[i] % width;
if (rowRanges.ContainsKey(row))
{
range = rowRanges[row];
range.BeginCol = Math.Min(range.BeginCol, col);
range.EndCol = Math.Max(range.EndCol, col);
}
else
{
range = new ColRangeOfRow(row, col, col);
rowRanges.Add(row, range);
}
}
return(rowRanges);
}
public static int[] Scale(int[] aoi, Size size, Size newSize)
{
if (aoi == null || aoi.Length == 1 || size.IsEmpty || newSize.IsEmpty)
{
return(null);
}
int nCount = aoi.Length;
int row = 0;
int col = 0;
int width = size.Width;
float scaleX = newSize.Width / (float)size.Width;
float scaleY = newSize.Height / (float)size.Height;
SortedList <int, ColRangeOfRow> rowRanges = new SortedList <int, ColRangeOfRow>();
ColRangeOfRow range = null;
for (int i = 0; i < nCount; i++)
{
row = (int)(scaleY * (aoi[i] / width));
col = (int)(scaleX * (aoi[i] % width));
if (rowRanges.ContainsKey(row))
{
range = rowRanges[row];
range.BeginCol = Math.Min(range.BeginCol, col);
range.EndCol = Math.Max(range.EndCol, col);
}
else
{
range = new ColRangeOfRow(row, col, col);
rowRanges.Add(row, range);
}
}
//插值
ColRangeOfRow[] rows = rowRanges.Values.ToArray();
if (rows.Length == 0)
{
return(null);
}
ColRangeOfRow crtRow = null;
ColRangeOfRow nxtRow = null;
int bColOffsetSpan = 0;
int eColOffsetSpan = 0;
List <int> retAOIs = new List <int>();
int newWidth = newSize.Width;
int bCol = 0;
int eCol = 0;
for (int i = 0; i < rows.Length - 1; i++)
{
crtRow = rows[i];
nxtRow = rows[i + 1];
bColOffsetSpan = (nxtRow.BeginCol - crtRow.BeginCol) / (nxtRow.Row - crtRow.Row);
eColOffsetSpan = (nxtRow.EndCol - crtRow.EndCol) / (nxtRow.Row - crtRow.Row);
bCol = crtRow.BeginCol;
eCol = crtRow.EndCol;
for (int r = crtRow.Row; r < nxtRow.Row; r++, bCol += bColOffsetSpan, eCol += eColOffsetSpan)
{
for (int c = bCol; c < eCol; c++)
{
retAOIs.Add(r * newWidth + c);
}
}
}
//最后一行
crtRow = rows[rows.Length - 1];
int lastRow = crtRow.Row;
bCol = crtRow.BeginCol;
eCol = crtRow.EndCol;
for (int c = bCol; c <= eCol; c++)
{
retAOIs.Add(lastRow * newWidth + c);
}
//
return(retAOIs.Count > 0 ? retAOIs.ToArray() : null);
}
