沧海一粟…… 通过本文主要向大家介绍了c#均值滤波,图像均值方差,图像均值方差公式,均值方差模型,均值方差等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
本文实例讲述了C#图像处理之图像均值方差计算的方法。分享给大家供大家参考。具体如下：
//本函数均是基于RGB颜色空间计算
//定义图像均值函数（RGB空间）
public double AnBitmap(Bitmap a)
{
double V = 0;
Rectangle rect = new Rectangle(0, 0, a.Width, a.Height);
System.Drawing.Imaging.BitmapData bmpData = a.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte* pIn = (byte*)bmpData.Scan0.ToPointer();
byte* P;
int R, G, B;
double meanvalue = 0, sum = 0;
int stride = bmpData.Stride;
for (int y = 0; y < a.Height; y++)
{
for (int x = 0; x < a.Width; x++)
{
P = pIn;
B = P[0];
G = P[1];
R = P[2];
sum += B * 0.114 + G * 0.587 + R * 0.299;
pIn += 3;
}
pIn += stride - a.Width * 3;
}
meanvalue = sum / (a.Width * a.Height);
V = meanvalue;
}
a.UnlockBits(bmpData);
return V; //返回图像均值V
}
//定义图像统计方差函数（RGB空间）
public double AnCONBitmap(Bitmap a,double meanvalue)
{
double V = 0;
Rectangle rect = new Rectangle(0, 0, a.Width, a.Height);
System.Drawing.Imaging.BitmapData bmpData = a.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte* pIn = (byte*)bmpData.Scan0.ToPointer();
byte* P;
int R, G, B;
double conv = 0, sum = 0;
int stride = bmpData.Stride;
for (int y = 0; y < a.Height; y++)
{
for (int x = 0; x < a.Width; x++)
{
P = pIn;
B = P[0];
G = P[1];
R = P[2];
sum += (B * 0.114 + G * 0.587 + R * 0.299 - meanvalue) * (B * 0.114 + G * 0.587 + R * 0.299 - meanvalue);
pIn += 3;
}
pIn += stride - a.Width * 3;
}
conv = sum / (a.Width * a.Height-1);
V = conv;
}
a.UnlockBits(bmpData);
return V; //返回图像方差V
}
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希望本文所述对大家的C#程序设计有所帮助。
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