error: ‘CV_WINDOW_FREERATIO’ was not declared in this scope
时间: 2023-10-22 08:08:33 浏览: 49
This error message typically occurs when the code is trying to use the constant "CV_WINDOW_FREERATIO" in a scope where it is not defined.
To resolve this error, you may need to include the appropriate header file that declares the constant. For example, if you are using OpenCV, you may need to include the "opencv2/highgui/highgui.hpp" header file.
Alternatively, you may need to check if the constant is spelled correctly and if it is available in the version of the library you are using.
If you are still having trouble resolving the error, please provide more context and code snippets so that we can better assist you.
相关问题
编译报错error: ‘CV_WINDOW_FREERATIO’ was not declared in this scope
该错误是由于OpenCV版本更新导致的。在旧版本中,常量CV_WINDOW_FREERATIO用于设置窗口大小自由调整,但在新版本中,该常量已被删除。
解决方法是将CV_WINDOW_FREERATIO替换为CV_WINDOW_NORMAL,并使用cv::resizeWindow函数手动调整窗口大小。例如:
```cpp
cv::namedWindow("window", CV_WINDOW_NORMAL);
cv::resizeWindow("window", width, height);
```
其中,width和height分别为窗口的宽度和高度。
error: ‘CV_LOAD_IMAGE_UNCHANGED’ was not declared in this scope
这个错误通常是由于使用了旧版本的OpenCV库导致的。在新版本的OpenCV库中,`CV_LOAD_IMAGE_UNCHANGED`已被替换为`cv::IMREAD_UNCHANGED`。建议使用`cv::imread`函数来读取图像,并将第二个参数设置为`cv::IMREAD_UNCHANGED`。例如:
```
cv::Mat image = cv::imread("image.jpg", cv::IMREAD_UNCHANGED);
```
如果您仍然需要使用旧版本的OpenCV库,请使用以下代码代替`CV_LOAD_IMAGE_UNCHANGED`:
```
#ifdef CV_LOAD_IMAGE_UNCHANGED
#define IMREAD_UNCHANGED CV_LOAD_IMAGE_UNCHANGED
#else
#define IMREAD_UNCHANGED -1
#endif
```
然后使用`IMREAD_UNCHANGED`作为第二个参数。例如:
```
cv::Mat image = cv::imread("image.jpg", IMREAD_UNCHANGED);
```