iPhone编程将IplImage坐标转换为UIImage坐标
我正在制作一个实时显示视频源的应用程序，并使用 OpenCV 处理帧以检测其中存在的人脸。为此，我需要将帧转换为 UIImage，然后转换为 IplImage。然后我运行面部检测，到目前为止一切都很好，除了检测到面部时捕获的坐标是 IplImage 的坐标并且原点从右下角开始......并且我需要具有左上角原点的坐标。
换句话说，我需要将具有右下原点的坐标点转换为具有左上角原点的坐标。有谁知道 Xcode 中是否有一个函数可以做到这一点？或者我可以从哪里开始寻找创建一个？
我需要坐标点，但无法直接在 IplImage 上绘制并转换回 UIImage 进行显示，因为我正在使用从面部检测获得的坐标点进行进一步处理。
任何帮助将不胜感激:) 谢谢！
I am making an application that shows the video feed in real time and I am processing the frames using OpenCV to detect faces present in them. To do this, I need to convert the frames into UIImage and then IplImage. Then I run the face detection and everything so far works great except that the coordinates captured when a face is detected are those for an IplImage and the origin starts at the bottom right corner... and I need coordinates with a top left origin.
In other words, I need to convert the coordinate points I have with a bottom right origin to coordinates with a top left origin. Does anyone know if there is a function to do this in Xcode? or where I can start to look to create one?
I need the coordinate points and cannot draw directly over the IplImage and convert back to UIImage to display because I am using the coordinate points I get from the face detection to do further processing.
Any help will be greatly appreciated :)
Thanks!
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如果 UIImage 和 IPLImage 的高度相同，您不能只从图像的高度中减去 y 坐标吗？
If the UIImage and IPLImage are the same height can't you just subtract the y coordinate from the image's height?