public List <PixInfor> getNoiseInfor(WriteableBitmap b, float driftPercent)//得到符合标准，也就是超过阀值的噪点的数量
//阀值是一个浮点数，实际是rgb偏移的允许比例
//bm是单一色块，driftPercent是阀值
{
List <PixInfor> pl = new List <PixInfor>();
Color AveC = this.getAverageColor(b);
var components = b.PixelBuffer.ToArray();
for (int i = 0; i < b.PixelHeight; i++)
{
for (int j = 0; j < b.PixelWidth; j++)
{
var index = i * b.PixelWidth * 4 + (j * 4);
Color c = new Color();
c.B = components[index];
c.G = components[index + 1];
c.R = components[index + 2];
if (IsNoise(c, AveC, driftPercent))//偏离平均值过大被认为是噪点
{
PixInfor pi = new PixInfor();
pi.colorValue = c;
pi.XPosition = j;
pi.YPosition = i;
pl.Add(pi);
}
}
}
return(pl);
}
public List <PixInfor> getEqualPix(WriteableBitmap SourceBitmap, WriteableBitmap TargetBitmap)
{
if (SourceBitmap.PixelHeight != TargetBitmap.PixelHeight)
{
return(null);
}
if (SourceBitmap.PixelWidth != TargetBitmap.PixelWidth)
{
return(null);
}
List <PixInfor> pl = new List <PixInfor>();
for (int i = 0; i < SourceBitmap.PixelHeight; i++)
{
for (int j = 0; j < SourceBitmap.PixelWidth; j++)
{
if (IsEpualPix(SourceBitmap, TargetBitmap, j, i))
{
PixInfor pi = new PixInfor();
pi.colorValue = GetPixel(SourceBitmap, j, i);
pi.XPosition = i % SourceBitmap.PixelWidth;
pi.YPosition = i / SourceBitmap.PixelWidth;
pi.PhotoH = SourceBitmap.PixelHeight;
pi.PhotoW = SourceBitmap.PixelWidth;
pl.Add(pi);
}
}
}
SourceBitmap = null;
TargetBitmap = null;
return(pl);
}
public bool IsSame(PixInfor a, PixInfor b, int ph, int bh)
{
if ((Math.Abs(a.XPosition - b.XPosition) < ph) && (Math.Abs(a.YPosition - b.YPosition) < ph))
{
if ((Math.Abs(a.colorValue.R - b.colorValue.R) < bh) && (Math.Abs(a.colorValue.G - b.colorValue.G) < bh) && (Math.Abs(a.colorValue.B - b.colorValue.B) < bh))
{
return(true);
}
}
return(false);
}
public bool IsBadPix(WriteableBitmap b, PixInfor p, int minStep, int maxStep, double h)//默认min是1，max是4,h是阀值
{
WriteableBitmap minB = getImageArea(b, p.XPosition - minStep, p.YPosition - minStep, minStep * 2 + 1, minStep * 2 + 1);
WriteableBitmap maxB = getImageArea(b, p.XPosition - maxStep, p.YPosition - maxStep, maxStep * 2 + 1, maxStep * 2 + 1);
double minL = getAverageColorL(minB);
double maxL = getAverageColorL(maxB);
if (Math.Abs(minL - maxL) >= h)
{
return(true);
}
return(false);
}
bool IsEpualPix(WriteableBitmap b, PixInfor pi)//判断一个图像和特定的PixInfor是否一致
{
List <int> il = getStepIndex(b.PixelWidth, b.PixelHeight, pi.XPosition, pi.YPosition);
foreach (int i in il)
{
if (IsEpualPix(b, pi))
{
return(true);
}
}
return(false);
}
public bool IsSameBright(PixInfor pi, WriteableBitmap b, int h)//判断在某个阀值下该点的亮度是否和图片对应位置的点的亮度一致
{
byte[] components = new byte[4];
components = BitConverter.GetBytes(b.PixelBuffer.ToArray()[pi.XPosition + pi.YPosition * b.PixelWidth]);
Color c = new Color();
c.B = components[0];
c.G = components[1];
c.R = components[2];
if ((Math.Abs(pi.colorValue.R - c.R) < h) && (Math.Abs(pi.colorValue.G - c.G) < h) && (Math.Abs(pi.colorValue.B - c.B) < h))
{
return(true);
}
return(false);
}
bool IsEpualPix(WriteableBitmap photo, int X, int Y, PixInfor pi) //判断一个像素整型是否和特定的PixInfor一致
{ //RGB任何的分量小于阀值都算是相等
Color c = GetPixel(photo, X, Y);
if (Math.Abs(c.R - pi.colorValue.R) < h)
{
return(true);
}
if (Math.Abs(c.G - pi.colorValue.G) < h)
{
return(true);
}
if (Math.Abs(c.B - pi.colorValue.B) < h)
{
return(true);
}
return(false);
}
public List <PixInfor> getGBExceptionPix(WriteableBitmap b, double h)//依据国标获得异常点
{
List <double> dl = getImageLList(b);
double d = 0;
foreach (double x in dl)
{
d = d + x;
}
d = d / dl.Count;
List <PixInfor> pl = new List <PixInfor>();
for (int i = 0; i < dl.Count; i++)
{
if (Math.Abs(dl[i] - d) >= h)
{
PixInfor p = new PixInfor();
p.YPosition = i / b.PixelWidth;
p.XPosition = i % b.PixelWidth;
p.colorValue = GetPixel(b, p.XPosition, p.YPosition);
}
}
return(pl);
}
