GetDIBits 遍历位图 获取像素的颜色值(RGB)
GetDIBits 遍历位图 获取像素的颜色值(RGB)
CBitmap m_bmp;
//根据位图资源导入之后的ID来获得位图
m_bmp.LoadBitmap(IDB_BITMAP_ORIGIN);</pre>
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
1 BITMAP bm; 2 m_bmp.GetBitmap(&bm); 3 4 int nbyte = bm.bmBitsPixel / 8; 5 6 BITMAPINFO bi; 7 bi.bmiHeader.biSize = sizeof(bi.bmiHeader); 8 bi.bmiHeader.biWidth = bm.bmWidth; 9 bi.bmiHeader.biHeight = -bm.bmHeight; 10 bi.bmiHeader.biPlanes = 1; 11 bi.bmiHeader.biBitCount = bm.bmBitsPixel; 12 bi.bmiHeader.biCompression = BI_RGB; 13 bi.bmiHeader.biSizeImage = bm.bmWidth * bm.bmHeight * nbyte; 14 bi.bmiHeader.biClrUsed = 0; 15 bi.bmiHeader.biClrImportant = 0; 16 17 // 获取位图数据 18 HDC hdc = ::GetDC(NULL); 19 BYTE* pBits = (BYTE*)new BYTE[bm.bmWidth * bm.bmHeight * nbyte]; 20 ::ZeroMemory(pBits, bm.bmWidth * bm.bmHeight * nbyte); 21 if (!::GetDIBits(hdc, m_bmp, 0, bm.bmHeight, pBits, &bi, DIB_RGB_COLORS)) 22 { 23 delete pBits; 24 pBits = NULL; 25 } 26 for (int i = 0;i < bm.bmWidth;++i) 27 { 28 for (int j = 0;j < bm.bmHeight;++j) 29 { 30 BYTE r = pBits[i * nbyte + j * bm.bmWidthBytes + 2]; 31 BYTE g = pBits[i * nbyte + j * bm.bmWidthBytes + 1]; 32 BYTE b = pBits[i * nbyte + j * bm.bmWidthBytes+ 0]; 33 //这里就可以做我们处理了 34 } 35 } 36 37 delete pBits; 38 pBits = NULL;
接下来就是通过GetDIBits函数来对位图的像素进行遍历,获取RGB
よろしく,お願いします!