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Description: 將openCV中之影像格式轉換成BCB可用之bmp格式,詳盡說明.-will openCV which is a video format conversion BCB is available bmp format described in detail.
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Size: 1024 |
Author: 李寧 |
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Description: Otsu算法步骤如下：
设图象包含L个灰度级(0,1…,L-1)，灰度值为i的的象素点数为Ni ，图象总的象素点数为N=N0+N1+...+N(L-1)。灰度值为i的点的概率为：
P(i) = N(i)/N.
门限t将整幅图象分为暗区c1和亮区c2两类，则类间方差σ是t的函数：
σ=a1*a2(u1-u2)^2 (2)
式中，aj 为类cj的面积与图象总面积之比，a1 = sum(P(i)) i->t, a2 = 1-a1 uj为类cj的均值，u1 = sum(i*P(i))/a1 0->t,
u2 = sum(i*P(i))/a2, t+1->L-1
该法选择最佳门限t^ 使类间方差最大，即：
令Δu=u1-u2，σb = max{a1(t)*a2(t)Δu^2}-int otsu (IplImage*image, int rows, int cols, int x0, int y0, int dx, int dy, int vvv)
{
unsigned char*np // 图像指针
int thresholdValue=1 // 阈值
int ihist[256] // 图像直方图，256个点
int i, j, k // various counters
int n, n1, n2, gmin, gmax
double m1, m2, sum, csum, fmax, sb
·····
Platform: |
Size: 1549312 |
Author: 燕子一舞 |
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