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| #include<stdio.h> #include<stdlib.h> #include<math.h> #include<string.h> #include<time.h> #define WORD unsigned short #define DWORD unsigned int #define BYTE unsigned char int ph,pw,psize,lsize; typedef struct BMP_FILE_HEADER { WORD bfType; DWORD bfSize; WORD bfReserved1; WORD bfReserved2; DWORD bfOffBits; }BMPFILEHEADER;
typedef struct BMP_INFO { DWORD biSize; DWORD biWidth; DWORD biHeight; WORD biPlanes; WORD biBitCount; DWORD biCompression; DWORD biSizeImage; DWORD biXPelsPerMeter; DWORD biYPelsPerMeter; DWORD biClrUsed; DWORD biClrImportant; } BMPINF; BMPFILEHEADER thisBmpFileHeader; BMPINF thisBmpInfo; void readFileHead(FILE *fp); void writeFileHead(FILE *fp); void meanFilter(BYTE *p,BYTE* pOUT,char *name); void medianFilter(BYTE *p,BYTE* pOUT,char *name); void Laplacian(BYTE *p,char *name); void OutPutImg(BYTE *pOUT,char *name); void AddNoise_salt(BYTE* p, BYTE *pNoise); void AddNoise_pepper(BYTE* p, BYTE *pNoise); int cmp_int(const void* _a , const void* _b); int main() { FILE *fp; if((fp=fopen("in.bmp","rb"))==NULL) { printf("Can't open the file\n"); return 0; } printf("open the file\n"); readFileHead(fp); ph=thisBmpInfo.biHeight; pw=thisBmpInfo.biWidth; psize=pw*ph*3; lsize=pw*3; BYTE* p=(BYTE*)malloc(psize); fread(p,psize,1,fp); fclose(fp); BYTE* pOUT=(BYTE*)malloc(psize); meanFilter(p,pOUT,"meanFiler_of_origin"); Laplacian(p,"Laplacian_of_origin"); BYTE* pNoise=(BYTE*)malloc(psize); AddNoise_salt(p,pNoise); meanFilter(pNoise,pOUT,"meanFiler_of_salt"); Laplacian(pOUT,"Laplacian_of_meanFiler_of_salt"); medianFilter(pNoise,pOUT,"medianFiler_of_salt"); Laplacian(pOUT,"Laplacian_of_medianFilter_of_salt"); AddNoise_pepper(p,pNoise); meanFilter(pNoise,pOUT,"meanFiler_of_pepper"); Laplacian(pOUT,"Laplacian_of_meanFiler_of_pepper"); medianFilter(pNoise,pOUT,"medianFiler_of_pepper"); Laplacian(pOUT,"Laplacian_of_medianFilter_of_pepper"); return 0; } void meanFilter(BYTE *p,BYTE* pOUT,char *name) { int i,j,tmp,_,o; int fx[9]={-1,-1,-1,0,0,0,1,1,1},fy[9]={-1,0,1,-1,0,1,-1,0,1}; for(i=0;i<ph;i++) { for(j=0;j<pw;j++) { tmp=i*lsize+j*3; for(_=0;_<3;_++) { int flag=0,value=0; for(o=0;o<9;o++) { int tmpi=i+fx[o],tmpj=j+fy[o]; if(tmpi>=0&&tmpi<ph&&tmpj>=0&&tmpj<pw) { int t=tmpi*lsize+tmpj*3; value+=p[t+_]; } else flag=1; } if(!flag) pOUT[tmp+_]=value/9; else pOUT[tmp+_]=p[tmp+_]; } } } OutPutImg(pOUT,name); } void Laplacian(BYTE *p,char *name) { BYTE* pOUT=(BYTE*)malloc(psize); int i,j,tmp,_,o; int fx[8]={-1,-1,-1,0,0,1,1,1},fy[8]={-1,0,1,-1,1,-1,0,1}; for(i=0;i<ph;i++) { for(j=0;j<pw;j++) { tmp=i*lsize+j*3; for(_=0;_<3;_++) { int flag=0,value=0; for(o=0;o<8;o++) { int tmpi=i+fx[o],tmpj=j+fy[o]; if(tmpi>=0&&tmpi<ph&&tmpj>=0&&tmpj<pw) { int t=tmpi*lsize+tmpj*3; value+=p[t+_]; } else flag=1; } if(!flag) { int nV=p[tmp+_]-(value-8*p[tmp+_]); if(nV<0) nV=0; if(nV>255) nV=255; pOUT[tmp+_]=nV; } else pOUT[tmp+_]=p[tmp+_]; } } } OutPutImg(pOUT,name); } void OutPutImg(BYTE *pOUT,char *name) { char postfix[10]=".bmp",tmp[100]; strcpy(tmp,name); strcat(tmp,postfix); FILE *fp=fopen(tmp,"wb"); writeFileHead(fp); fwrite(pOUT,psize,1,fp); fclose(fp); printf("%s",name); printf(" finised!\n"); } void readFileHead(FILE *fp) { fread(&thisBmpFileHeader.bfType,sizeof(thisBmpFileHeader.bfType),1,fp); fread(&thisBmpFileHeader.bfSize,sizeof(thisBmpFileHeader.bfSize),1,fp); fread(&thisBmpFileHeader.bfReserved1,sizeof(thisBmpFileHeader.bfReserved1),1,fp); fread(&thisBmpFileHeader.bfReserved2,sizeof(thisBmpFileHeader.bfReserved2),1,fp); fread(&thisBmpFileHeader.bfOffBits,sizeof(thisBmpFileHeader.bfOffBits),1,fp); fread(&thisBmpInfo.biSize, sizeof(thisBmpInfo.biSize), 1, fp); fread(&thisBmpInfo.biWidth, sizeof(thisBmpInfo.biWidth), 1, fp); fread(&thisBmpInfo.biHeight, sizeof(thisBmpInfo.biHeight), 1, fp); fread(&thisBmpInfo.biPlanes, sizeof(thisBmpInfo.biPlanes), 1, fp); fread(&thisBmpInfo.biBitCount, sizeof(thisBmpInfo.biBitCount), 1, fp); fread(&thisBmpInfo.biCompression, sizeof(thisBmpInfo.biCompression), 1, fp); fread(&thisBmpInfo.biSizeImage, sizeof(thisBmpInfo.biSizeImage), 1, fp); fread(&thisBmpInfo.biXPelsPerMeter, sizeof(thisBmpInfo.biXPelsPerMeter), 1, fp); fread(&thisBmpInfo.biYPelsPerMeter, sizeof(thisBmpInfo.biYPelsPerMeter), 1, fp); fread(&thisBmpInfo.biClrUsed, sizeof(thisBmpInfo.biClrUsed), 1, fp); fread(&thisBmpInfo.biClrImportant, sizeof(thisBmpInfo.biClrImportant), 1, fp); } void writeFileHead(FILE *fp) { fwrite(&thisBmpFileHeader.bfType,sizeof(thisBmpFileHeader.bfType),1,fp); fwrite(&thisBmpFileHeader.bfSize,sizeof(thisBmpFileHeader.bfSize),1,fp); fwrite(&thisBmpFileHeader.bfReserved1,sizeof(thisBmpFileHeader.bfReserved1),1,fp); fwrite(&thisBmpFileHeader.bfReserved2,sizeof(thisBmpFileHeader.bfReserved2),1,fp); fwrite(&thisBmpFileHeader.bfOffBits,sizeof(thisBmpFileHeader.bfOffBits),1,fp);
fwrite(&thisBmpInfo.biSize, sizeof(thisBmpInfo.biSize), 1, fp); fwrite(&thisBmpInfo.biWidth, sizeof(thisBmpInfo.biWidth), 1, fp); fwrite(&thisBmpInfo.biHeight, sizeof(thisBmpInfo.biHeight), 1, fp); fwrite(&thisBmpInfo.biPlanes, sizeof(thisBmpInfo.biPlanes), 1, fp); fwrite(&thisBmpInfo.biBitCount, sizeof(thisBmpInfo.biBitCount), 1, fp); fwrite(&thisBmpInfo.biCompression, sizeof(thisBmpInfo.biCompression), 1, fp); fwrite(&thisBmpInfo.biSizeImage, sizeof(thisBmpInfo.biSizeImage), 1, fp); fwrite(&thisBmpInfo.biXPelsPerMeter, sizeof(thisBmpInfo.biXPelsPerMeter), 1, fp); fwrite(&thisBmpInfo.biYPelsPerMeter, sizeof(thisBmpInfo.biYPelsPerMeter), 1, fp); fwrite(&thisBmpInfo.biClrUsed, sizeof(thisBmpInfo.biClrUsed), 1, fp); fwrite(&thisBmpInfo.biClrImportant, sizeof(thisBmpInfo.biClrImportant), 1, fp); } void AddNoise_salt(BYTE* p, BYTE *pNoise) { srand(time(0)); int *flag=(int *)malloc(ph*pw*sizeof(int)); memset(flag,0,sizeof(int)*ph*pw); int num=ph*pw*0.01; int i,j,tmp,_; for(i=0;i<ph;i++) for(j=0;j<pw;j++) { tmp=i*lsize+j*3; for(_=0;_<3;_++) pNoise[tmp+_]=p[tmp+_]; } for(i=0;i<num;i++) { int tmpi=rand()%ph, tmpj=rand()%pw; while(flag[tmpi*pw+tmpj]) { tmpi=rand()%ph; tmpj=rand()%pw; } flag[tmpi*pw+tmpj]=1; for(_=0;_<3;_++) { pNoise[tmpi*lsize+tmpj*3+_]=255; } } OutPutImg(pNoise,"Salt_Noise"); } void AddNoise_pepper(BYTE* p, BYTE *pNoise) { srand(time(0)); int *flag=(int *)malloc(ph*pw*sizeof(int)); memset(flag,0,sizeof(int)*ph*pw); int num=ph*pw*0.01; int i,j,tmp,_; for(i=0;i<ph;i++) for(j=0;j<pw;j++) { tmp=i*lsize+j*3; for(_=0;_<3;_++) pNoise[tmp+_]=p[tmp+_]; } for(i=0;i<num;i++) { int tmpi=rand()%ph, tmpj=rand()%pw; while(flag[tmpi*pw+tmpj]) { tmpi=rand()%ph; tmpj=rand()%pw; } flag[tmpi*pw+tmpj]=1; for(_=0;_<3;_++) { pNoise[tmpi*lsize+tmpj*3+_]=0; } } OutPutImg(pNoise,"Pepper_Noise"); } int cmp_int(const void* _a , const void* _b) { int* a = (int*)_a; int* b = (int*)_b; return *a - *b; } void medianFilter(BYTE *p,BYTE* pOUT,char *name) { int i,j,tmp,_,o; int fx[9]={-1,-1,-1,0,0,0,1,1,1},fy[9]={-1,0,1,-1,0,1,-1,0,1},value[9]; for(i=0;i<ph;i++) { for(j=0;j<pw;j++) { tmp=i*lsize+j*3; for(_=0;_<3;_++) { int flag=0; for(o=0;o<9;o++) { int tmpi=i+fx[o],tmpj=j+fy[o]; if(tmpi>=0&&tmpi<ph&&tmpj>=0&&tmpj<pw) { int t=tmpi*lsize+tmpj*3; value[o]=p[t+_]; } else { flag=1; break; } } if(!flag) { qsort(value,9,sizeof(int),cmp_int); pOUT[tmp+_]=value[4]; } else pOUT[tmp+_]=p[tmp+_]; } } } OutPutImg(pOUT,name); }
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