75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
#include<iostream>
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#include<cmath>
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#include<cstdio>
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#define H 265
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#define W 272
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using namespace std;
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int main()
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{
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unsigned char *grey;
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grey = new unsigned char[H * W];
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FILE *f;
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fopen_s(&f, "./数据/blood.raw", "rb");
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if (!f)
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{
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cout << "无法打开文件" << endl;
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return 0;
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}
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fread(grey, sizeof(unsigned char), H * W, f);
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fclose(f);
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// 模板
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int tw = 3;
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int th = 3;
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int template1[9]={-1,0,1,-1,0,1,-1,0,1};
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int template2[9]={-1,-1,-1,0,0,0,1,1,1};
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int i,j,k,l;
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unsigned char *result_grey;
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result_grey = new unsigned char[H * W];
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for (i = 0; i < H * W; i++)
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{
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result_grey[i] = 255;
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}
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for (i = th / 2; i < H - th / 2; i++)
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{
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for (j = tw / 2; j < W - tw / 2; j++)
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{
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// 应用prewitt模板
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int sum1 = 0;
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int sum2 = 0;
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int sum=0;
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for (k = -th / 2; k <= th / 2; k++)
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{
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for (l = -tw / 2; l <= tw / 2; l++)
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{
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sum1 += grey[(i + k) * W + (j + l)] * template1[(k + th / 2) * tw + (l + tw / 2)];
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sum2 += grey[(i + k) * W + (j + l)] * template2[(k + th / 2) * tw + (l + tw / 2)];
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}
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}
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sum=abs(sum1)+abs(sum2);
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if(sum>100)
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{
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result_grey[i * W + j] = 0;
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}
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else
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{
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result_grey[i * W + j] = 255;
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}
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}
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}
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FILE *fnew;
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fopen_s(&fnew, "./数据/prewitt.raw", "wb");
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if (fnew)
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{
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fwrite(result_grey, sizeof(unsigned char), H * W, fnew);
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}
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else
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{
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cout << "创建文件失败" << endl;
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return 0;
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}
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} |