如何使用 CImage 正确加载灰度 BMP 的字符数组？
我有以下代码：
cout<<"Please enter the name of your BMP image file: "<<endl;
cin>>fname;
nP = fname.c_str();
CImage input = CImage();
input.Load(nP);
// allocate space for host source image
unsigned char *pHI, *pCI;
width = input.GetWidth();
height = input.GetHeight();
pCI = (unsigned char *)input.GetBits();
pHI = (unsigned char *)malloc(sizeof(unsigned char) * width * height);
// fill array with CImage array content
srand (time(NULL));
for (int cnt = 0; cnt < sizeof(unsigned char) * width * height; cnt++){
pHI[cnt] = pCI[cnt];
}
但是当我尝试获取宽度和高度时，程序给了我一个错误。
“调试断言失败！...表达式：m_hBitmap！=0”
如果您对可能导致此问题的原因/我应该更改什么有任何想法，我将不胜感激！
:)
I have the following code:
cout<<"Please enter the name of your BMP image file: "<<endl;
cin>>fname;
nP = fname.c_str();
CImage input = CImage();
input.Load(nP);
// allocate space for host source image
unsigned char *pHI, *pCI;
width = input.GetWidth();
height = input.GetHeight();
pCI = (unsigned char *)input.GetBits();
pHI = (unsigned char *)malloc(sizeof(unsigned char) * width * height);
// fill array with CImage array content
srand (time(NULL));
for (int cnt = 0; cnt < sizeof(unsigned char) * width * height; cnt++){
pHI[cnt] = pCI[cnt];
}
But the program gives me an error when I try to get the width and height.
"Debug Assertion Failed! ... Expression: m_hBitmap !=0"
If you have any ideas as to what could be causing this / what I should change, I'd appreciate the help!
: )
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首先要检查的是
input.Load()是否成功。它返回一个HRESULT，您应该检查它的值。这将是关于正在发生的事情的线索。链接到 CImage::Load()
您可以解释 HRESULT 的含义此处：
有关 HRESULT 的详细信息
祝你好运，但还需要更多信息。
编辑后：此外，您只能对 DIB 部分使用 CImage::Load() 。有关详细信息，请参阅此链接：CImage 类参考
First thing to check is that
input.Load()is successful. It returns anHRESULTand you should check the value of this. It's going to be a clue as to what's going on.Link to CImage::Load()
You can interpret what an HRESULT means here:
Details on HRESULT
Good luck, but more information is needed.
After edit: Further more, you can only use CImage::Load() for DIB sections. See this link for more info: CImage class reference