[問題] 加入中央加權中值濾波

看板C_and_CPP (C/C++)作者mayday1210 (阿台)時間13年前 (2012/08/30 10:12)推噓0(0推 0噓 3→)

留言3則, 2人參與討論串1/1

開發平台(Platform): (Ex: VC++, GCC, Linux, ...) VC6.0 額外使用到的函數庫(Library Used): (Ex: OpenGL, ...) 問題(Question)：已經完成開圖開檔灰階等動作但是想要寫入中央加權中值法卻無法使用 argc與argv 所以想要使用陣列方式讀取圖片並以中央加權中值法寫入變化餵入的資料(Input)：預期的正確結果(Expected Output)：錯誤結果(Wrong Output)：程式碼(Code)：(請善用置底文網頁, 記得排版) #include <stdio.h> #include <stdlib.h> int bmp_read(unsigned char *image, int xsize, int ysize, const char *filename) { char fname_bmp[128]; FILE *fp; unsigned char header[54]; sprintf(fname_bmp, "%s.bmp", filename); if (!(fp = fopen(fname_bmp, "rb"))) return -1; fread(header, sizeof(unsigned char), 54, fp); fread(image, sizeof(unsigned char), (size_t)(long)xsize * ysize * 3, fp); fclose(fp); return 0; } int bmp_write(unsigned char *image, int xsize, int ysize, char *filename) { unsigned char header[54] = { 0x42, 0x4d, 0, 0, 0, 0, 0, 0, 0, 0, 54, 0, 0, 0, 40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; long file_size = (long)xsize * (long)ysize * 3 + 54; long width, height; char fname_bmp[128]; FILE *fp; header[2] = (unsigned char)(file_size &0x000000ff); header[3] = (file_size >> 8) & 0x000000ff; header[4] = (file_size >> 16) & 0x000000ff; header[5] = (file_size >> 24) & 0x000000ff; width = xsize; header[18] = width & 0x000000ff; header[19] = (width >> 8) &0x000000ff; header[20] = (width >> 16) &0x000000ff; header[21] = (width >> 24) &0x000000ff; height = ysize; header[22] = height &0x000000ff; header[23] = (height >> 8) &0x000000ff; header[24] = (height >> 16) &0x000000ff; header[25] = (height >> 24) &0x000000ff; sprintf(fname_bmp, "%s.bmp", filename); if (!(fp = fopen(fname_bmp, "wb"))) return -1; fwrite(header, sizeof(unsigned char), 54, fp); fwrite(image, sizeof(unsigned char), (size_t)(long)xsize * ysize * 3, fp); fclose(fp); return 0; } int main(void) { unsigned char *image, gray; int xsize = 256; int ysize = 256; int row, col; image = (unsigned char *)malloc((size_t)xsize * ysize * 3); if (image == NULL) return -1; bmp_read(image, xsize, ysize, "trees"); //real image file //-------------color --> gray level----------------------- for (row=0; row < xsize; row++) { //ptr=(Byte *) TempBitmap->ScanLine[row]; //real 1 row pixels //index=0; for (col=0; col< ysize; col++) // RGB -> GrayLevel for a pixel { gray=(unsigned char) ( 0.2126* (*(image + 3 * (row*xsize+col) )) + 0.7152* (*(image + 3 * (row*xsize+col)+1 )) + 0.0722* (*(image + 3 * (row*xsize+col)+2 ) ) ); *(image + 3 * (row*xsize+col) +2)=gray; *(image + 3 * (row*xsize+col) +1)=gray; *(image + 3 * (row*xsize+col) ) =gray; //index +=3; //img[row][col]=gray; } } //---------------------image processing algorithm ---------------- //-------------------------------------------------------------------- bmp_write(image, xsize, ysize, "clena_clone_C"); //write image file free(image); } 補充說明(Supplement)： -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.121.137.228