Description:
void CDopicDlg::OnBnClickedQuse()
{
// TODO: 在此添加控件通知处理程序代码
CDC* m_dc
CRect m_rect
m_pic.GetClientRect(m_rect)
m_dc = m_pic.GetDC()
int r1,g1,b1,r2,g2,b2
for (int i = 1 i<m_rect.right+1 i++)
for (int j = 1 j< m_rect.bottom+1 j++)
{
COLORREF color = m_dc->GetPixel(i,j)
double m_gray
r1 = GetRValue(color)
g1 = GetGValue(color)
b1 = GetBValue(color)
m_gray = (0.38*r1+0.49*g1+0.1*b1)
color = RGB(m_gray,m_gray,m_gray)
m_dc->SetPixel(i,j,color)
}
}
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