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taofei

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[ÇóÖú] ÔõÑù°ÑÕâ¶Î´úÂë±ä³Ématlab´úÂë ÒÑÓÐ2È˲ÎÓë

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http://www.librow.com/articles/article-7

//   2D ALPHA-TRIMMED MEAN FILTER implementation
//     image - input image
//     result - output image
//     N - width of the image
//     M - height of the image
//     alph - filter alpha parameter
void _alphatrimmedmeanfilter(const element* image, element* result, int N, int M, int alpha)
{
   //   Start of the trimmed ordered set
   const int start = alpha >> 1;
   //   End of the trimmed ordered set
   const int end = 9 - (alpha >> 1);
   //   Move window through all elements of the image
   for (int m = 1; m < M - 1; ++m)
      for (int n = 1; n < N - 1; ++n)
      {
         //   Pick up window elements
         int k = 0;
         element window[9];
         for (int j = m - 1; j < m + 2; ++j)
            for (int i = n - 1; i < n + 2; ++i)
               window[k++] = image[j * N + i];
         //   Order elements (only necessary part of them)
         for (int j = 0; j < end; ++j)
         {
            //   Find position of minimum element
            int min = j;
            for (int l = j + 1; l < 9; ++l)
            if (window[l] < window[min])
               min = l;
            //   Put found minimum element in its place
            const element temp = window[j];
            window[j] = window[min];
            window[min] = temp;
         }
         //   Target index in result image
         const int target = (m - 1) * (N - 2) + n - 1;
         //   Get result - the mean value of the elements in trimmed set
         result[target] = window[start];
         for (int j = start + 1; j < end; ++j)
            result[target] += window[j];
         result[target] /= 9 - alpha;
      }
}
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taofei

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5Â¥: Originally posted by 363418323 at 2013-12-18 16:59:46
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6Â¥2013-12-18 17:56:14
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2Â¥2013-12-18 12:22:06
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taofei

¾èÖú¹ó±ö (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by hppdyx at 2013-12-18 12:22:06
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3Â¥2013-12-18 12:58:09
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hppdyx

ľ³æ (ÖªÃû×÷¼Ò)

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ÒýÓûØÌû:
3Â¥: Originally posted by taofei at 2013-12-18 12:58:09
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