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在使用OpenCV4Android的应用程序中，如何确定相机是在拍摄8位图像还是32位图像？

[英]In an app using OpenCV4Android, how to find out if the camera is taking 8-bit image or 32-bit image?

原文 2015-12-04 14:52:58 2 1 android/ opencv/ hsv/ color-space/ opencv4android

In OpenCV HSV images, the scale of Hue depends on the type of image. 在OpenCV HSV图像中，Hue的比例取决于图像的类型。 From this answer , 从这个答案，

For HSV images it depends on the image type (see OpenCV doc): 对于HSV图像，它取决于图像类型（请参阅OpenCV文档）：

8 bit images: H in [0, 180], S,V in [0, 255] 8位图像：[0，180]中为H，[0，255]中为S，V

32bit images: H in [0, 360] ,S,V in [0,1] 32位图像：[0，360]中为H，[0,1]中为S，V

I have two questions: 我有两个问题：

How do I know which type of image or frame (whether 8-bit or 32-bit) is the camera detecting, eg how would I know in this class in the Color Blob Detection sample application? 我如何知道相机正在检测哪种类型的图像或帧（无论是8位还是32位），例如我如何在“色斑检测”示例应用程序的此类中知道？
Is there a way to force the camera to take 32 bit image (because I really want the second scale, and if there is no way, I will have to find a way to convert the first scale to the second one, because Android's Color.HSVToColor method follows the second scale)? 有没有一种方法可以强迫相机拍摄32位图像（因为我真的想要第二个比例尺，如果没有办法，我将不得不找到一种方法将第一个比例尺转换为第二个比例尺，因为Android的是Color.HSVToColor方法遵循第二个标度）？

1 个解决方案

1) It uses CvType.CV_8U so that means 8 bit unsigned. 1）它使用CvType.CV_8U表示8位无符号。

2) Probably not, you have to dive in the part of code that actually controls the camera and grabs a frame to find this out. 2）可能不是，您必须深入研究实际控制摄像机的代码部分，并抓住一个框架来找出答案。 However, you can simply convert a 8 bit image to 32 bit by using convertTo functions. 但是，您可以使用convertTo函数将8位图像简单地转换为32位。