OpenCV（C ++）：如何保存16位图像？ [英] OpenCV (C++): how to save a 16bit image?

问题描述

我使用kinect，我需要保存RAW深度图像。这意味着我不应该保存它与转换为8位（这是什么imwrite是做！），但保存为16位，没有任何位深度减少。我希望这个问题不会太微不足道，但我是新来的OpenCV编程。我试过下面的，但它不工作：

I'm working with kinect, and I need to save RAW depth image. This means that I shouldn't save it with a conversion to 8 bit (that is what imwrite is doing!) but save it as 16 bit, without have any bit-depth reducing. I hope that this question will not be too trivial, but I'm new to OpenCV programming. I tried the following, but it doesn't work:

[...]

Mat imageDepth ( 480, 640, CV_16UC1 );
Mat imageRGB;

// Video stream settings
VideoCapture capture;
capture.open( CAP_OPENNI );

if ( !capture.isOpened() ) {
  cerr << "Cannot get video stream!" << endl;
  exit ( EXIT_WITH_ERROR );
}

if ( !capture.grab() ) {
  cerr << "Cannot grab images!" << endl;
  exit ( EXIT_WITH_ERROR );
}

// Getting frames
if ( capture.retrieve( imageDepth, CAP_OPENNI_DISPARITY_MAP ) ) {
  imwrite( fileDepth, imageDepth );
}
if( capture.retrieve( imageRGB, CAP_OPENNI_BGR_IMAGE ) ) {
  imwrite( fileRGB, imageRGB );
}

return EXIT_WITH_SUCCESS;

提前感谢。

推荐答案

问题不是以图像被保存的方式，这是正确的（如果有人会有同样的问题，一定要保存为PNG / TIFF格式，并指定CV_16UC1时）。
它不保存为16bit，因为VideoCapture;实际上我做了以下：

The problem wasn't in the way the image was saved, that was all right (if someone will have the same problem, be sure to save in PNG/TIFF format and specify CV_16UC1 when reading). It wasn't saved as 16bit because of VideoCapture; in fact I did the following:

if ( capture.retrieve( imageDepth, CAP_OPENNI_DISPARITY_MAP ) ) {
   imwrite( fileDepth, imageDepth );
}

但正确的做法是：

if ( capture.retrieve( imageDepth, CAP_OPENNI_DEPTH_MAP ) ) {
  imwrite( fileDepth, imageDepth );
}

这是一个愚蠢的问题。

所有尝试帮助我的人。

So it was a silly problem.
Thanks to all the people who tried to help me.

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