您好,登錄后才能下訂單哦!
這篇文章主要講解了“怎么用C語言實現(xiàn)BMP圖像邊緣檢測處理”,文中的講解內(nèi)容簡單清晰,易于學(xué)習(xí)與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學(xué)習(xí)“怎么用C語言實現(xiàn)BMP圖像邊緣檢測處理”吧!
具體內(nèi)容如下
以Sobel算子為例,其余模板算子卷積代碼部分同Sobel算子。如:高斯算子、拉普拉斯算子等
#include <stdio.h> #include <stdlib.h> #include <Windows.h> #include <math.h> int main(int* argc, char** argv) { FILE* fp = fopen("./01.bmp", "rb"); if (fp == 0) return 0; BITMAPFILEHEADER fileHead; fread(&fileHead, sizeof(BITMAPFILEHEADER), 1, fp); BITMAPINFOHEADER infoHead; fread(&infoHead, sizeof(BITMAPINFOHEADER), 1, fp); int width = infoHead.biWidth; int height = infoHead.biHeight; int biCount = infoHead.biBitCount; int lineByte = (biCount*width / 8 + 3) / 4 * 4; RGBQUAD* pColorTable; pColorTable = new RGBQUAD[256]; fread(pColorTable, sizeof(RGBQUAD), 256, fp); unsigned char* pBmpBuf; pBmpBuf = new unsigned char[lineByte*height]; fread(pBmpBuf, lineByte*height, 1, fp); fclose(fp); // 新圖 FILE* fop = fopen("sobel.bmp", "wb"); if (fop == 0) return 0; unsigned char *pBmpBuf2; // 初始化 pBmpBuf2 = new unsigned char[lineByte*height]; for (int i = 0; i < height; ++i){ for (int j = 0; j < width; ++j){ *(pBmpBuf2 + i*lineByte + j) = *(pBmpBuf + i*lineByte + j); } } int ul, uc, ur, dl, dc, dr; int lu, lc, ld, ru, rc, rd; double hir, vec; for (int i = 1; i < height - 1; ++i){ for (int j = 1; j < width - 1; ++j){ // 垂直梯度算子:檢測水平邊緣 vec = 0; ul = *(pBmpBuf + (i + 1)*lineByte + (j - 1))*(-1); uc = *(pBmpBuf + (i + 1)*lineByte + j)*(-2); ur = *(pBmpBuf + (i + 1)*lineByte + j)*(-1); dl = *(pBmpBuf + (i - 1)*lineByte + (j - 1)) * 1; dc = *(pBmpBuf + (i - 1)*lineByte + j) * 2; dr = *(pBmpBuf + (i - 1)*lineByte + j) * 1; vec = ul + uc + ur + dl + dc + dr; // 水平梯度算子:檢測垂直邊緣 hir = 0; lu = *(pBmpBuf + (i + 1)*lineByte + (j - 1))*(-1); lc = *(pBmpBuf + (i - 0)*lineByte + (j - 1))*(-2); ld = *(pBmpBuf + (i - 1)*lineByte + (j - 1))*(-1); ru = *(pBmpBuf + (i + 1)*lineByte + (j + 1)) * 1; rc = *(pBmpBuf + (i - 0)*lineByte + (j + 1)) * 2; rd = *(pBmpBuf + (i - 1)*lineByte + (j + 1)) * 1; hir = lu + lc + ld + ru + rc + rd; *(pBmpBuf2+i*lineByte+j) = round(sqrt(hir*hir + vec*vec)); } } fwrite(&fileHead, sizeof(BITMAPFILEHEADER), 1, fop); fwrite(&infoHead, sizeof(BITMAPINFOHEADER), 1, fop); fwrite(pColorTable, sizeof(RGBQUAD), 256, fop); fwrite(pBmpBuf2, lineByte*height, 1, fop); fclose(fop); system("pause"); return 0; }
實驗結(jié)果:
感謝各位的閱讀,以上就是“怎么用C語言實現(xiàn)BMP圖像邊緣檢測處理”的內(nèi)容了,經(jīng)過本文的學(xué)習(xí)后,相信大家對怎么用C語言實現(xiàn)BMP圖像邊緣檢測處理這一問題有了更深刻的體會,具體使用情況還需要大家實踐驗證。這里是億速云,小編將為大家推送更多相關(guān)知識點的文章,歡迎關(guān)注!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。