将CV_16SC2 Mat保存到文件OpenCV

问题描述：

我想将CV_16SC2矩阵保存到文件中.这是initUndistortRectifyMap的结果.我需要它以二进制形式，后来我想从文件中读取它.最好的方法是什么(YAML，XML由于所需的空间而不好)?

I want to save the CV_16SC2 matrix to a file. It is a result of initUndistortRectifyMap. I need it in a binary form, and later i want to read it from a file. What is the best method for that (YAML, XML is bad because of required space)?

答

如果您不想使用提供的方式

If you don't want to use the provided ways XML/YMAL Input and Output. You have to write your own.

首先请确保您输入的类型正确.在您的计算机上使用cout << mat.type()并检查下表.

First make sure you have the correct type. Use cout << mat.type() on your and check in the table below.

        C1  C2  C3  C4
CV_8U   0   8   16  24
CV_8S   1   9   17  25
CV_16U  2   10  18  26
CV_16S  3   11  19  27
CV_32S  4   12  20  28
CV_32F  5   13  21  29
CV_64F  6   14  22  30

现在，您知道Matrixelements的通道数和正确的类型(位计数). 例如，数字mat.type() == 11表示您的类型是:CV_16SC2，因此16位(带符号短)和2个通道.

Now you know the Number of channels and the correct type (bitcount) of your Matrixelements. For example Number mat.type() == 11 would mean your type is: CV_16SC2, so 16 bit (signed short) and 2 channel.

如果您现在不了解位计数和变量名之间的关系，请检查以下内容:

If you don't now the relation between bitcount and variablename check the following:

Unsigned 8bits uchar 0~255
Mat: CV_8UC1, CV_8UC2, CV_8UC3, CV_8UC4

Signed 8bits char -128~127
Mat: CV_8SC1，CV_8SC2，CV_8SC3，CV_8SC4

Unsigned 16bits ushort 0~65535
Mat: CV_16UC1，CV_16UC2，CV_16UC3，CV_16UC4

Signed 16bits short -32768~32767
Mat: CV_16SC1，CV_16SC2，CV_16SC3，CV_16SC4

Signed 32bits int -2147483648~2147483647
Mat: CV_32SC1，CV_32SC2，CV_32SC3，CV_32SC4

Float 32bits float -1.18*10-38~3.40*10-38 
Mat: CV_32FC1，CV_32FC2，CV_32FC3，CV_32FC4

Double 64bits double 
Mat: CV_64FC1，CV_64FC2，CV_64FC3，CV_64FC4

要访问它们，您需要使用 at 正确的类型！

To access them you need to use at with the correct type!

在我们的CV_16SC2(带符号的短和2通道)示例中，这表示:Vec2s.

In our CV_16SC2 (signed short and 2 channel) example that would mean: Vec2s.

Vec因为我们想要一个向量2因为有2个通道s因为我们想要一个带符号的短路.

Vec because we want a vector, 2 because there are 2 channel, s, because we want a signed short.

因此，要获取位置(5,7)处第二个通道的值到变量's'中，可以这样写:

So to get the value of the second channel at position (5,7) into variable 's', you could write:

Vec2s v = mat.at<Vec2s>(5, 7);
short s = v[1];

由于您要保存矩阵，因此您可能需要先写入矩阵的大小(行，列，通道)，然后再写入所有值.

Since you want to save your Matrix you probably want to do first write the size (rows, cols, channels) of your matrix and afterwards all the values.

感谢 http://ninghang. blogspot.de/2012/11/list-of-mat-type-in-opencv.html 为我提供了最终了解一切的信息！

Thanks to http://ninghang.blogspot.de/2012/11/list-of-mat-type-in-opencv.html for providing me the information to finally understand everything!

将CV_16SC2 Mat保存到文件OpenCV

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