error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'
时间: 2023-05-11 11:06:56 浏览: 2894
这个错误通常是由于尝试将空图像写入文件而导致的。您需要确保在调用cv::imwrite函数之前,图像已经被正确地加载并且不为空。您可以使用cv::imread函数加载图像,然后检查图像是否为空,例如:
cv::Mat img = cv::imread("image.jpg");
if (!img.empty()) {
cv::imwrite("output.jpg", img);
} else {
std::cout << "Failed to load image!" << std::endl;
}
相关问题
error: (-215:Assertion failed) !_img.empty() in function 'imwrite'
根据引用中提到的信息,"error: (-215:Assertion failed) !_img.empty() in function 'imwrite'"是由于在视频分帧保存为图片时出现的问题。这个错误通常发生在没有正确检查帧是否为空的情况下尝试写入图片时。解决这个问题的方法是在写入图片之前添加一个判断条件,确保帧不为空。具体来说,你可以在写入图片之前添加以下代码:
```
if not _img.empty():
cv2.imwrite('path_to_save_image.jpg', _img)
```
这样做可以避免出现"error: (-215:Assertion failed) !_img.empty() in function 'imwrite'"的错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [error: (-215:Assertion failed)的两种解决方案](https://blog.csdn.net/yin20020606/article/details/127235580)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *2* [tensor_proto.raw_data().empty() || !tensor_proto.float_data().empty() || !tensor_proto.double_data()](https://download.csdn.net/download/weixin_38571878/14035634)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *3* [解决python-opencv:(-215:Assertion failed) _img.empty() in function ‘cv::imwrite‘在将视频分成帧图片...](https://blog.csdn.net/qq_54731673/article/details/126891909)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
[ .reference_list ]
cpp:787: error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'
这个错误通常是由于图像为空导致的。在 OpenCV 的 cv::imwrite 函数中,当传入的图像为空时会触发这个断言错误。要解决这个问题,你可以在调用 cv::imwrite 前先检查一下图像是否为空。例如:
```cpp
if (!_img.empty()) {
cv::imwrite("output.jpg", _img);
} else {
// 处理图像为空的情况
}
```